STORM-1051: merge daggy fix to tip

1 files changed, 1324 insertions, 0 deletions

diff --git a/indra/llcommon/tests/lleventdispatcher_test.cpp b/indra/llcommon/tests/lleventdispatcher_test.cpp
new file mode 100644
index 0000000000..263c9b171f
--- /dev/null
+++ b/indra/llcommon/tests/lleventdispatcher_test.cpp
@@ -0,0 +1,1324 @@
+/**
+ * @file   lleventdispatcher_test.cpp
+ * @author Nat Goodspeed
+ * @date   2011-01-20
+ * @brief  Test for lleventdispatcher.
+ * 
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Copyright (c) 2011, Linden Research, Inc.
+ * $/LicenseInfo$
+ */
+
+// Precompiled header
+#include "linden_common.h"
+// associated header
+#include "lleventdispatcher.h"
+// STL headers
+// std headers
+// external library headers
+// other Linden headers
+#include "../test/lltut.h"
+#include "llsd.h"
+#include "llsdutil.h"
+#include "stringize.h"
+#include "tests/wrapllerrs.h"
+
+#include <map>
+#include <string>
+#include <stdexcept>
+
+#include <boost/bind.hpp>
+#include <boost/function.hpp>
+#include <boost/range.hpp>
+#include <boost/foreach.hpp>
+#define foreach BOOST_FOREACH
+
+#include <boost/lambda/lambda.hpp>
+
+#include <iostream>
+#include <iomanip>
+
+using boost::lambda::constant;
+using boost::lambda::constant_ref;
+using boost::lambda::var;
+
+using namespace llsd;
+
+/*****************************************************************************
+*   Output control
+*****************************************************************************/
+#ifdef DEBUG_ON
+using std::cout;
+#else
+static std::ostringstream cout;
+#endif
+
+/*****************************************************************************
+*   Example data, functions, classes
+*****************************************************************************/
+// We don't need a whole lot of different arbitrary-params methods, just (no |
+// (const LLSD&) | arbitrary) args (function | static method | non-static
+// method), where 'arbitrary' is (every LLSD datatype + (const char*)).
+// But we need to register each one under different names for the different
+// registration styles. Don't forget LLEventDispatcher subclass methods(const
+// LLSD&).
+
+// However, the number of target parameter conversions we want to try exceeds
+// boost::fusion::invoke()'s supported parameter-list size. Break out two
+// different lists.
+#define NPARAMSa bool b, int i, float f, double d, const char* cp
+#define NPARAMSb const std::string& s, const LLUUID& uuid, const LLDate& date, \
+                 const LLURI& uri, const std::vector<U8>& bin
+#define NARGSa   b, i, f, d, cp
+#define NARGSb   s, uuid, date, uri, bin
+
+// For some registration methods we need methods on a subclass of
+// LLEventDispatcher. To simplify things, we'll use this Dispatcher subclass
+// for all our testing, including testing its own methods.
+class Dispatcher: public LLEventDispatcher
+{
+public:
+    Dispatcher(const std::string& name, const std::string& key):
+        LLEventDispatcher(name, key)
+    {}
+
+    // sensing member, mutable because we want to know when we've reached our
+    // const method too
+    mutable LLSD llsd;
+
+    void method1(const LLSD& obj) { llsd = obj; }
+    void cmethod1(const LLSD& obj) const { llsd = obj; }
+};
+
+// sensing vars, captured in a struct to make it convenient to clear them
+struct Vars
+{
+    LLSD llsd;
+    bool b;
+    int i;
+    float f;
+    double d;
+    // Capture param passed as char*. But merely storing a char* received from
+    // our caller, possibly the .c_str() from a concatenation expression,
+    // would be Bad: the pointer will be invalidated long before we can query
+    // it. We could allocate a new chunk of memory, copy the string data and
+    // point to that instead -- but hey, guess what, we already have a class
+    // that does that!
+    std::string cp;
+    std::string s;
+    LLUUID uuid;
+    LLDate date;
+    LLURI uri;
+    std::vector<U8> bin;
+
+    Vars():
+        // Only need to initialize the POD types, the rest should take care of
+        // default-constructing themselves.
+        b(false),
+        i(0),
+        f(0),
+        d(0)
+    {}
+
+    // Detect any non-default values for convenient testing
+    LLSD inspect() const
+    {
+        LLSD result;
+
+        if (llsd.isDefined())
+            result["llsd"] = llsd;
+        if (b)
+            result["b"] = b;
+        if (i)
+            result["i"] = i;
+        if (f)
+            result["f"] = f;
+        if (d)
+            result["d"] = d;
+        if (! cp.empty())
+            result["cp"] = cp;
+        if (! s.empty())
+            result["s"] = s;
+        if (uuid != LLUUID())
+            result["uuid"] = uuid;
+        if (date != LLDate())
+            result["date"] = date;
+        if (uri != LLURI())
+            result["uri"] = uri;
+        if (! bin.empty())
+            result["bin"] = bin;
+
+        return result;
+    }
+
+    /*------------- no-args (non-const, const, static) methods -------------*/
+    void method0()
+    {
+        cout << "method0()\n";
+        i = 17;
+    }
+
+    void cmethod0() const
+    {
+        cout << 'c';
+        const_cast<Vars*>(this)->method0();
+    }
+
+    static void smethod0();
+
+    /*------------ Callable (non-const, const, static) methods -------------*/
+    void method1(const LLSD& obj)
+    {
+        cout << "method1(" << obj << ")\n";
+        llsd = obj;
+    }
+
+    void cmethod1(const LLSD& obj) const
+    {
+        cout << 'c';
+        const_cast<Vars*>(this)->method1(obj);
+    }
+
+    static void smethod1(const LLSD& obj);
+
+    /*-------- Arbitrary-params (non-const, const, static) methods ---------*/
+    void methodna(NPARAMSa)
+    {
+        // Because our const char* param cp might be NULL, and because we
+        // intend to capture the value in a std::string, have to distinguish
+        // between the NULL value and any non-NULL value. Use a convention
+        // easy for a human reader: enclose any non-NULL value in single
+        // quotes, reserving the unquoted string "NULL" to represent a NULL ptr.
+        std::string vcp;
+        if (cp == NULL)
+            vcp = "NULL";
+        else
+            vcp = std::string("'") + cp + "'";
+
+        cout << "methodna(" << b
+             << ", " << i
+             << ", " << f
+             << ", " << d
+             << ", " << vcp
+             << ")\n";
+
+        this->b = b;
+        this->i = i;
+        this->f = f;
+        this->d = d;
+        this->cp = vcp;
+    }
+
+    void methodnb(NPARAMSb)
+    {
+        std::ostringstream vbin;
+        foreach(U8 byte, bin)
+        {
+            vbin << std::hex << std::setfill('0') << std::setw(2) << unsigned(byte);
+        }
+
+        cout << "methodnb(" << "'" << s << "'"
+             << ", " << uuid
+             << ", " << date
+             << ", '" << uri << "'"
+             << ", " << vbin.str()
+             << ")\n";
+
+        this->s = s;
+        this->uuid = uuid;
+        this->date = date;
+        this->uri = uri;
+        this->bin = bin;
+    }
+
+    void cmethodna(NPARAMSa) const
+    {
+        cout << 'c';
+        const_cast<Vars*>(this)->methodna(NARGSa);
+    }
+
+    void cmethodnb(NPARAMSb) const
+    {
+        cout << 'c';
+        const_cast<Vars*>(this)->methodnb(NARGSb);
+    }
+
+    static void smethodna(NPARAMSa);
+    static void smethodnb(NPARAMSb);
+};
+/*------- Global Vars instance for free functions and static methods -------*/
+static Vars g;
+
+/*------------ Static Vars method implementations reference 'g' ------------*/
+void Vars::smethod0()
+{
+    cout << "smethod0() -> ";
+    g.method0();
+}
+
+void Vars::smethod1(const LLSD& obj)
+{
+    cout << "smethod1(" << obj << ") -> ";
+    g.method1(obj);
+}
+
+void Vars::smethodna(NPARAMSa)
+{
+    cout << "smethodna(...) -> ";
+    g.methodna(NARGSa);
+}
+
+void Vars::smethodnb(NPARAMSb)
+{
+    cout << "smethodnb(...) -> ";
+    g.methodnb(NARGSb);
+}
+
+/*--------------------------- Reset global Vars ----------------------------*/
+void clear()
+{
+    g = Vars();
+}
+
+/*------------------- Free functions also reference 'g' --------------------*/
+void free0()
+{
+    cout << "free0() -> ";
+    g.method0();
+}
+
+void free1(const LLSD& obj)
+{
+    cout << "free1(" << obj << ") -> ";
+    g.method1(obj);
+}
+
+void freena(NPARAMSa)
+{
+    cout << "freena(...) -> ";
+    g.methodna(NARGSa);
+}
+
+void freenb(NPARAMSb)
+{
+    cout << "freenb(...) -> ";
+    g.methodnb(NARGSb);
+}
+
+/*****************************************************************************
+*   TUT
+*****************************************************************************/
+namespace tut
+{
+    struct lleventdispatcher_data
+    {
+        WrapLL_ERRS redirect;
+        Dispatcher work;
+        Vars v;
+        std::string name, desc;
+        // Capture our own copy of all registered functions' descriptions
+        typedef std::map<std::string, std::string> DescMap;
+        DescMap descs;
+        // Capture the Vars instance on which we expect each function to operate
+        typedef std::map<std::string, Vars*> VarsMap;
+        VarsMap funcvars;
+        // Required structure for Callables with requirements
+        LLSD required;
+        // Parameter names for freena(), freenb()
+        LLSD params;
+        // Full, partial defaults arrays for params for freena(), freenb()
+        LLSD dft_array_full, dft_array_partial;
+        // Start index of partial defaults arrays
+        const LLSD::Integer partial_offset;
+        // Full, partial defaults maps for params for freena(), freenb()
+        LLSD dft_map_full, dft_map_partial;
+        // Most of the above are indexed by "a" or "b". Useful to have an
+        // array containing those strings for iterating.
+        std::vector<LLSD::String> ab;
+
+        lleventdispatcher_data():
+            work("test dispatcher", "op"),
+            // map {d=double, array=[3 elements]}
+            required(LLSDMap("d", LLSD::Real(0))("array", LLSDArray(LLSD())(LLSD())(LLSD()))),
+            // first several params are required, last couple optional
+            partial_offset(3)
+        {
+            // This object is reconstructed for every test<n> method. But
+            // clear global variables every time too.
+            ::clear();
+
+            const char* abs[] = { "a", "b" };
+            ab.assign(boost::begin(abs), boost::end(abs));
+
+            // Registration cases:
+            // - (Callable | subclass const method | subclass non-const method |
+            //   non-subclass method) (with | without) required
+            // - (Free function | static method | non-static method), (no | arbitrary) params,
+            //   array style
+            // - (Free function | static method | non-static method), (no | arbitrary) params,
+            //   map style, (empty | partial | full) (array | map) defaults
+            // - Map-style errors:
+            //   - (scalar | map) param names
+            //   - defaults scalar
+            //   - defaults array longer than params array
+            //   - defaults map with plural unknown param names
+
+            // I hate to have to write things twice, because of having to keep
+            // them consistent. If we had variadic functions, addf() would be
+            // a variadic method, capturing the name and desc and passing them
+            // plus "everything else" to work.add(). If I could return a pair
+            // and use that pair as the first two args to work.add(), I'd do
+            // that. But the best I can do with present C++ is to set two
+            // instance variables as a side effect of addf(), and pass those
+            // variables to each work.add() call. :-P
+
+            /*------------------------- Callables --------------------------*/
+
+            // Arbitrary Callable with/out required params
+            addf("free1", "free1", &g);
+            work.add(name, desc, free1);
+            addf("free1_req", "free1", &g);
+            work.add(name, desc, free1, required);
+            // Subclass non-const method with/out required params
+            addf("Dmethod1", "method1", NULL);
+            work.add(name, desc, &Dispatcher::method1);
+            addf("Dmethod1_req", "method1", NULL);
+            work.add(name, desc, &Dispatcher::method1, required);
+            // Subclass const method with/out required params
+            addf("Dcmethod1", "cmethod1", NULL);
+            work.add(name, desc, &Dispatcher::cmethod1);
+            addf("Dcmethod1_req", "cmethod1", NULL);
+            work.add(name, desc, &Dispatcher::cmethod1, required);
+            // Non-subclass method with/out required params
+            addf("method1", "method1", &v);
+            work.add(name, desc, boost::bind(&Vars::method1, boost::ref(v), _1));
+            addf("method1_req", "method1", &v);
+            work.add(name, desc, boost::bind(&Vars::method1, boost::ref(v), _1), required);
+
+            /*--------------- Arbitrary params, array style ----------------*/
+
+            // (Free function | static method) with (no | arbitrary) params, array style
+            addf("free0_array", "free0", &g);
+            work.add(name, desc, free0);
+            addf("freena_array", "freena", &g);
+            work.add(name, desc, freena);
+            addf("freenb_array", "freenb", &g);
+            work.add(name, desc, freenb);
+            addf("smethod0_array", "smethod0", &g);
+            work.add(name, desc, &Vars::smethod0);
+            addf("smethodna_array", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna);
+            addf("smethodnb_array", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb);
+            // Non-static method with (no | arbitrary) params, array style
+            addf("method0_array", "method0", &v);
+            work.add(name, desc, &Vars::method0, boost::lambda::var(v));
+            addf("methodna_array", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, boost::lambda::var(v));
+            addf("methodnb_array", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, boost::lambda::var(v));
+
+            /*---------------- Arbitrary params, map style -----------------*/
+
+            // We lay out each params list as an array, also each array of
+            // default values we'll register. We'll zip these into
+            // (param=value) maps. Why not define them as maps and just
+            // extract the keys and values to arrays? Because that wouldn't
+            // give us the right params-list order.
+
+            // freena(), methodna(), cmethodna(), smethodna() all take same param list.
+            // Same for freenb() et al.
+            params = LLSDMap("a", LLSDArray("b")("i")("f")("d")("cp"))
+                            ("b", LLSDArray("s")("uuid")("date")("uri")("bin"));
+            cout << "params:\n" << params << "\nparams[\"a\"]:\n" << params["a"] << "\nparams[\"b\"]:\n" << params["b"] << std::endl;
+            // default LLSD::Binary value   
+            std::vector<U8> binary;
+            for (size_t ix = 0, h = 0xaa; ix < 6; ++ix, h += 0x11)
+            {
+                binary.push_back(h);
+            }
+            // Full defaults arrays. We actually don't care what the LLUUID or
+            // LLDate values are, as long as they're different from the
+            // LLUUID() and LLDate() default values so inspect() will report
+            // them.
+            dft_array_full = LLSDMap("a", LLSDArray(true)(17)(3.14)(123456.78)("classic"))
+                                    ("b", LLSDArray("string")
+                                                   (LLUUID::generateNewID())
+                                                   (LLDate::now())
+                                                   (LLURI("http://www.ietf.org/rfc/rfc3986.txt"))
+                                                   (binary));
+            cout << "dft_array_full:\n" << dft_array_full << std::endl;
+            // Partial defaults arrays.
+            foreach(LLSD::String a, ab)
+            {
+                LLSD::Integer partition(std::min(partial_offset, dft_array_full[a].size()));
+                dft_array_partial[a] =
+                    llsd_copy_array(dft_array_full[a].beginArray() + partition,
+                                    dft_array_full[a].endArray());
+            }
+            cout << "dft_array_partial:\n" << dft_array_partial << std::endl;
+
+            foreach(LLSD::String a, ab)
+            {
+                // Generate full defaults maps by zipping (params, dft_array_full).
+                dft_map_full[a] = zipmap(params[a], dft_array_full[a]);
+
+                // Generate partial defaults map by zipping alternate entries from
+                // (params, dft_array_full). Part of the point of using map-style
+                // defaults is to allow any subset of the target function's
+                // parameters to be optional, not just the rightmost.
+                for (LLSD::Integer ix = 0, ixend = params[a].size(); ix < ixend; ix += 2)
+                {
+                    dft_map_partial[a][params[a][ix].asString()] = dft_array_full[a][ix];
+                }
+            }
+            cout << "dft_map_full:\n" << dft_map_full << "\ndft_map_partial:\n" << dft_map_partial << '\n';
+
+            // (Free function | static method) with (no | arbitrary) params,
+            // map style, no (empty array) defaults
+            addf("free0_map", "free0", &g);
+            work.add(name, desc, free0, LLSD::emptyArray());
+            addf("smethod0_map", "smethod0", &g);
+            work.add(name, desc, &Vars::smethod0, LLSD::emptyArray());
+            addf("freena_map_allreq", "freena", &g);
+            work.add(name, desc, freena, params["a"]);
+            addf("freenb_map_allreq", "freenb", &g);
+            work.add(name, desc, freenb, params["b"]);
+            addf("smethodna_map_allreq", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna, params["a"]);
+            addf("smethodnb_map_allreq", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb, params["b"]);
+            // Non-static method with (no | arbitrary) params, map style, no
+            // (empty array) defaults
+            addf("method0_map", "method0", &v);
+            work.add(name, desc, &Vars::method0, var(v), LLSD::emptyArray());
+            addf("methodna_map_allreq", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, var(v), params["a"]);
+            addf("methodnb_map_allreq", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, var(v), params["b"]);
+
+            // Except for the "more (array | map) defaults than params" error
+            // cases, tested separately below, the (partial | full)(array |
+            // map) defaults cases don't apply to no-params functions/methods.
+            // So eliminate free0, smethod0, method0 from the cases below.
+
+            // (Free function | static method) with arbitrary params, map
+            // style, partial (array | map) defaults
+            addf("freena_map_leftreq", "freena", &g);
+            work.add(name, desc, freena, params["a"], dft_array_partial["a"]);
+            addf("freenb_map_leftreq", "freenb", &g);
+            work.add(name, desc, freenb, params["b"], dft_array_partial["b"]);
+            addf("smethodna_map_leftreq", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna, params["a"], dft_array_partial["a"]);
+            addf("smethodnb_map_leftreq", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb, params["b"], dft_array_partial["b"]);
+            addf("freena_map_skipreq", "freena", &g);
+            work.add(name, desc, freena, params["a"], dft_map_partial["a"]);
+            addf("freenb_map_skipreq", "freenb", &g);
+            work.add(name, desc, freenb, params["b"], dft_map_partial["b"]);
+            addf("smethodna_map_skipreq", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna, params["a"], dft_map_partial["a"]);
+            addf("smethodnb_map_skipreq", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb, params["b"], dft_map_partial["b"]);
+            // Non-static method with arbitrary params, map style, partial
+            // (array | map) defaults
+            addf("methodna_map_leftreq", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, var(v), params["a"], dft_array_partial["a"]);
+            addf("methodnb_map_leftreq", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, var(v), params["b"], dft_array_partial["b"]);
+            addf("methodna_map_skipreq", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, var(v), params["a"], dft_map_partial["a"]);
+            addf("methodnb_map_skipreq", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, var(v), params["b"], dft_map_partial["b"]);
+
+            // (Free function | static method) with arbitrary params, map
+            // style, full (array | map) defaults
+            addf("freena_map_adft", "freena", &g);
+            work.add(name, desc, freena, params["a"], dft_array_full["a"]);
+            addf("freenb_map_adft", "freenb", &g);
+            work.add(name, desc, freenb, params["b"], dft_array_full["b"]);
+            addf("smethodna_map_adft", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna, params["a"], dft_array_full["a"]);
+            addf("smethodnb_map_adft", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb, params["b"], dft_array_full["b"]);
+            addf("freena_map_mdft", "freena", &g);
+            work.add(name, desc, freena, params["a"], dft_map_full["a"]);
+            addf("freenb_map_mdft", "freenb", &g);
+            work.add(name, desc, freenb, params["b"], dft_map_full["b"]);
+            addf("smethodna_map_mdft", "smethodna", &g);
+            work.add(name, desc, &Vars::smethodna, params["a"], dft_map_full["a"]);
+            addf("smethodnb_map_mdft", "smethodnb", &g);
+            work.add(name, desc, &Vars::smethodnb, params["b"], dft_map_full["b"]);
+            // Non-static method with arbitrary params, map style, full
+            // (array | map) defaults
+            addf("methodna_map_adft", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, var(v), params["a"], dft_array_full["a"]);
+            addf("methodnb_map_adft", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, var(v), params["b"], dft_array_full["b"]);
+            addf("methodna_map_mdft", "methodna", &v);
+            work.add(name, desc, &Vars::methodna, var(v), params["a"], dft_map_full["a"]);
+            addf("methodnb_map_mdft", "methodnb", &v);
+            work.add(name, desc, &Vars::methodnb, var(v), params["b"], dft_map_full["b"]);
+
+            // All the above are expected to succeed, and are setup for the
+            // tests to follow. Registration error cases are exercised as
+            // tests rather than as test setup.
+        }
+
+        void addf(const std::string& n, const std::string& d, Vars* v)
+        {
+            // This method is to capture in our own DescMap the name and
+            // description of every registered function, for metadata query
+            // testing.
+            descs[n] = d;
+            // Also capture the Vars instance on which each function should operate.
+            funcvars[n] = v;
+            // See constructor for rationale for setting these instance vars.
+            this->name = n;
+            this->desc = d;
+        }
+
+        void verify_descs()
+        {
+            // Copy descs to a temp map of same type.
+            DescMap forgotten(descs.begin(), descs.end());
+            // LLEventDispatcher intentionally provides only const_iterator:
+            // since dereferencing that iterator generates values on the fly,
+            // it's meaningless to have a modifiable iterator. But since our
+            // 'work' object isn't const, by default BOOST_FOREACH() wants to
+            // use non-const iterators. Persuade it to use the const_iterator.
+            foreach(LLEventDispatcher::NameDesc nd, const_cast<const Dispatcher&>(work))
+            {
+                DescMap::iterator found = forgotten.find(nd.first);
+                ensure(STRINGIZE("LLEventDispatcher records function '" << nd.first
+                                 << "' we didn't enter"),
+                       found != forgotten.end());
+                ensure_equals(STRINGIZE("LLEventDispatcher desc '" << nd.second <<
+                                        "' doesn't match what we entered: '" << found->second << "'"),
+                              nd.second, found->second);
+                // found in our map the name from LLEventDispatcher, good, erase
+                // our map entry
+                forgotten.erase(found);
+            }
+            if (! forgotten.empty())
+            {
+                std::ostringstream out;
+                out << "LLEventDispatcher failed to report";
+                const char* delim = ": ";
+                foreach(const DescMap::value_type& fme, forgotten)
+                {
+                    out << delim << fme.first;
+                    delim = ", ";
+                }
+                ensure(out.str(), false);
+            }
+        }
+
+        Vars* varsfor(const std::string& name)
+        {
+            VarsMap::const_iterator found = funcvars.find(name);
+            ensure(STRINGIZE("No Vars* for " << name), found != funcvars.end());
+            ensure(STRINGIZE("NULL Vars* for " << name), found->second);
+            return found->second;
+        }
+
+        void ensure_has(const std::string& outer, const std::string& inner)
+        {
+            ensure(STRINGIZE("'" << outer << "' does not contain '" << inner << "'").c_str(),
+                   outer.find(inner) != std::string::npos);
+        }
+
+        void call_exc(const std::string& func, const LLSD& args, const std::string& exc_frag)
+        {
+            std::string threw;
+            try
+            {
+                work(func, args);
+            }
+            catch (const std::runtime_error& e)
+            {
+                cout << "*** " << e.what() << '\n';
+                threw = e.what();
+            }
+            ensure_has(threw, exc_frag);
+        }
+
+        LLSD getMetadata(const std::string& name)
+        {
+            LLSD meta(work.getMetadata(name));
+            ensure(STRINGIZE("No metadata for " << name), meta.isDefined());
+            return meta;
+        }
+
+        // From two related LLSD arrays, e.g. a param-names array and a values
+        // array, zip them together into an LLSD map.
+        LLSD zipmap(const LLSD& keys, const LLSD& values)
+        {
+            LLSD map;
+            for (LLSD::Integer i = 0, iend = keys.size(); i < iend; ++i)
+            {
+                // Have to select asString() since you can index an LLSD
+                // object with either String or Integer.
+                map[keys[i].asString()] = values[i];
+            }
+            return map;
+        }
+
+        // If I call this ensure_equals(), it blocks visibility of all other
+        // ensure_equals() overloads. Normally I could say 'using
+        // baseclass::ensure_equals;' and fix that, but I don't know what the
+        // base class is!
+        void ensure_llsd(const std::string& msg, const LLSD& actual, const LLSD& expected, U32 bits)
+        {
+            std::ostringstream out;
+            if (! msg.empty())
+            {
+                out << msg << ": ";
+            }
+            out << "expected " << expected << ", actual " << actual;
+            ensure(out.str(), llsd_equals(actual, expected, bits));
+        }
+
+        void ensure_llsd(const LLSD& actual, const LLSD& expected, U32 bits)
+        {
+            ensure_llsd("", actual, expected, bits);
+        }
+    };
+    typedef test_group<lleventdispatcher_data> lleventdispatcher_group;
+    typedef lleventdispatcher_group::object object;
+    lleventdispatcher_group lleventdispatchergrp("lleventdispatcher");
+
+    // Call cases:
+    // - (try_call | call) (explicit name | event key) (real | bogus) name
+    // - Callable with args that (do | do not) match required
+    // - (Free function | non-static method), no args, (array | map) style
+    // - (Free function | non-static method), arbitrary args,
+    //   (array style with (scalar | map) | map style with scalar)
+    // - (Free function | non-static method), arbitrary args, array style with
+    //   array (too short | too long | just right)
+    //   [trap LL_WARNS for too-long case?]
+    // - (Free function | non-static method), arbitrary args, map style with
+    //   (array | map) (all | too many | holes (with | without) defaults)
+    // - const char* param gets ("" | NULL)
+
+    // Query cases:
+    // - Iterate over all (with | without) remove()
+    // - getDispatchKey()
+    // - Callable style (with | without) required
+    // - (Free function | non-static method), array style, (no | arbitrary) params
+    // - (Free function | non-static method), map style, (no | arbitrary) params,
+    //   (empty | full | partial (array | map)) defaults
+
+    template<> template<>
+    void object::test<1>()
+    {
+        set_test_name("map-style registration with non-array params");
+        // Pass "param names" as scalar or as map
+        LLSD attempts(LLSDArray(17)(LLSDMap("pi", 3.14)("two", 2)));
+        foreach(LLSD ae, inArray(attempts))
+        {
+            std::string threw;
+            try
+            {
+                work.add("freena_err", "freena", freena, ae);
+            }
+            catch (const std::exception& e)
+            {
+                threw = e.what();
+            }
+            ensure_has(threw, "must be an array");
+        }
+    }
+
+    template<> template<>
+    void object::test<2>()
+    {
+        set_test_name("map-style registration with badly-formed defaults");
+        std::string threw;
+        try
+        {
+            work.add("freena_err", "freena", freena, LLSDArray("a")("b"), 17);
+        }
+        catch (const std::exception& e)
+        {
+            threw = e.what();
+        }
+        ensure_has(threw, "must be a map or an array");
+    }
+
+    template<> template<>
+    void object::test<3>()
+    {
+        set_test_name("map-style registration with too many array defaults");
+        std::string threw;
+        try
+        {
+            work.add("freena_err", "freena", freena,
+                     LLSDArray("a")("b"),
+                     LLSDArray(17)(0.9)("gack"));
+        }
+        catch (const std::exception& e)
+        {
+            threw = e.what();
+        }
+        ensure_has(threw, "shorter than");
+    }
+
+    template<> template<>
+    void object::test<4>()
+    {
+        set_test_name("map-style registration with too many map defaults");
+        std::string threw;
+        try
+        {
+            work.add("freena_err", "freena", freena,
+                     LLSDArray("a")("b"),
+                     LLSDMap("b", 17)("foo", 3.14)("bar", "sinister"));
+        }
+        catch (const std::exception& e)
+        {
+            threw = e.what();
+        }
+        ensure_has(threw, "nonexistent params");
+        ensure_has(threw, "foo");
+        ensure_has(threw, "bar");
+    }
+
+    template<> template<>
+    void object::test<5>()
+    {
+        set_test_name("query all");
+        verify_descs();
+    }
+
+    template<> template<>
+    void object::test<6>()
+    {
+        set_test_name("query all with remove()");
+        ensure("remove('bogus') returned true", ! work.remove("bogus"));
+        ensure("remove('real') returned false", work.remove("free1"));
+        // Of course, remove that from 'descs' too...
+        descs.erase("free1");
+        verify_descs();
+    }
+
+    template<> template<>
+    void object::test<7>()
+    {
+        set_test_name("getDispatchKey()");
+        ensure_equals(work.getDispatchKey(), "op");
+    }
+
+    template<> template<>
+    void object::test<8>()
+    {
+        set_test_name("query Callables with/out required params");
+        LLSD names(LLSDArray("free1")("Dmethod1")("Dcmethod1")("method1"));
+        foreach(LLSD nm, inArray(names))
+        {
+            LLSD metadata(getMetadata(nm));
+            ensure_equals("name mismatch", metadata["name"], nm);
+            ensure_equals(metadata["desc"].asString(), descs[nm]);
+            ensure("should not have required structure", metadata["required"].isUndefined());
+            ensure("should not have optional", metadata["optional"].isUndefined());
+
+            std::string name_req(nm.asString() + "_req");
+            metadata = getMetadata(name_req);
+            ensure_equals(metadata["name"].asString(), name_req);
+            ensure_equals(metadata["desc"].asString(), descs[name_req]);
+            ensure_equals("required mismatch", required, metadata["required"]);
+            ensure("should not have optional", metadata["optional"].isUndefined());
+        }
+    }
+
+    template<> template<>
+    void object::test<9>()
+    {
+        set_test_name("query array-style functions/methods");
+        // Associate each registered name with expected arity.
+        LLSD expected(LLSDArray
+                      (LLSDArray
+                       (0)(LLSDArray("free0_array")("smethod0_array")("method0_array")))
+                      (LLSDArray
+                       (5)(LLSDArray("freena_array")("smethodna_array")("methodna_array")))
+                      (LLSDArray
+                       (5)(LLSDArray("freenb_array")("smethodnb_array")("methodnb_array"))));
+        foreach(LLSD ae, inArray(expected))
+        {
+            LLSD::Integer arity(ae[0].asInteger());
+            LLSD names(ae[1]);
+            LLSD req(LLSD::emptyArray());
+            if (arity)
+                req[arity - 1] = LLSD();
+            foreach(LLSD nm, inArray(names))
+            {
+                LLSD metadata(getMetadata(nm));
+                ensure_equals("name mismatch", metadata["name"], nm);
+                ensure_equals(metadata["desc"].asString(), descs[nm]);
+                ensure_equals(STRINGIZE("mismatched required for " << nm.asString()),
+                              metadata["required"], req);
+                ensure("should not have optional", metadata["optional"].isUndefined());
+            }
+        }
+    }
+
+    template<> template<>
+    void object::test<10>()
+    {
+        set_test_name("query map-style no-params functions/methods");
+        // - (Free function | non-static method), map style, no params (ergo
+        //   no defaults)
+        LLSD names(LLSDArray("free0_map")("smethod0_map")("method0_map"));
+        foreach(LLSD nm, inArray(names))
+        {
+            LLSD metadata(getMetadata(nm));
+            ensure_equals("name mismatch", metadata["name"], nm);
+            ensure_equals(metadata["desc"].asString(), descs[nm]);
+            ensure("should not have required",
+                   (metadata["required"].isUndefined() || metadata["required"].size() == 0));
+            ensure("should not have optional", metadata["optional"].isUndefined());
+        }
+    }
+
+    template<> template<>
+    void object::test<11>()
+    {
+        set_test_name("query map-style arbitrary-params functions/methods: "
+                      "full array defaults vs. full map defaults");
+        // With functions registered with no defaults ("_allreq" suffixes),
+        // there is of course no difference between array defaults and map
+        // defaults. (We don't even bother registering with LLSD::emptyArray()
+        // vs. LLSD::emptyMap().) With functions registered with all defaults,
+        // there should (!) be no difference beween array defaults and map
+        // defaults. Verify, so we can ignore the distinction for all other
+        // tests.
+        LLSD equivalences(LLSDArray
+                          (LLSDArray("freena_map_adft")("freena_map_mdft"))
+                          (LLSDArray("freenb_map_adft")("freenb_map_mdft"))
+                          (LLSDArray("smethodna_map_adft")("smethodna_map_mdft"))
+                          (LLSDArray("smethodnb_map_adft")("smethodnb_map_mdft"))
+                          (LLSDArray("methodna_map_adft")("methodna_map_mdft"))
+                          (LLSDArray("methodnb_map_adft")("methodnb_map_mdft")));
+        foreach(LLSD eq, inArray(equivalences))
+        {
+            LLSD adft(eq[0]);
+            LLSD mdft(eq[1]);
+            // We can't just compare the results of the two getMetadata()
+            // calls, because they contain ["name"], which are different. So
+            // capture them, verify that each ["name"] is as expected, then
+            // remove for comparing the rest.
+            LLSD ameta(getMetadata(adft));
+            LLSD mmeta(getMetadata(mdft));
+            ensure_equals("adft name", adft, ameta["name"]);
+            ensure_equals("mdft name", mdft, mmeta["name"]);
+            ameta.erase("name");
+            mmeta.erase("name");
+            ensure_equals(STRINGIZE("metadata for " << adft.asString()
+                                    << " vs. " << mdft.asString()),
+                          ameta, mmeta);
+        }
+    }
+
+    template<> template<>
+    void object::test<12>()
+    {
+        set_test_name("query map-style arbitrary-params functions/methods");
+        // - (Free function | non-static method), map style, arbitrary params,
+        //   (empty | full | partial (array | map)) defaults
+
+        // Generate maps containing all parameter names for cases in which all
+        // params are required. Also maps containing left requirements for
+        // partial defaults arrays. Also defaults maps from defaults arrays.
+        LLSD allreq, leftreq, rightdft;
+        foreach(LLSD::String a, ab)
+        {
+            // The map in which all params are required uses params[a] as
+            // keys, with all isUndefined() as values. We can accomplish that
+            // by passing zipmap() an empty values array.
+            allreq[a] = zipmap(params[a], LLSD::emptyArray());
+            // Same for leftreq, save that we use the subset of the params not
+            // supplied by dft_array_partial[a].
+            LLSD::Integer partition(params[a].size() - dft_array_partial[a].size());
+            leftreq[a] = zipmap(llsd_copy_array(params[a].beginArray(),
+                                                params[a].beginArray() + partition),
+                                LLSD::emptyArray());
+            // Generate map pairing dft_array_partial[a] values with their
+            // param names.
+            rightdft[a] = zipmap(llsd_copy_array(params[a].beginArray() + partition,
+                                                 params[a].endArray()),
+                                 dft_array_partial[a]);
+        }
+        cout << "allreq:\n" << allreq << "\nleftreq:\n" << leftreq << "\nrightdft:\n" << rightdft << std::endl;
+
+        // Generate maps containing parameter names not provided by the
+        // dft_map_partial maps.
+        LLSD skipreq(allreq);
+        foreach(LLSD::String a, ab)
+        {
+            foreach(const MapEntry& me, inMap(dft_map_partial[a]))
+            {
+                skipreq[a].erase(me.first);
+            }
+        }
+        cout << "skipreq:\n" << skipreq << std::endl;
+
+        LLSD groups(LLSDArray       // array of groups
+
+                    (LLSDArray      // group
+                     (LLSDArray("freena_map_allreq")("smethodna_map_allreq")("methodna_map_allreq"))
+                     (LLSDArray(allreq["a"])(LLSD()))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freenb_map_allreq")("smethodnb_map_allreq")("methodnb_map_allreq"))
+                     (LLSDArray(allreq["b"])(LLSD()))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freena_map_leftreq")("smethodna_map_leftreq")("methodna_map_leftreq"))
+                     (LLSDArray(leftreq["a"])(rightdft["a"]))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freenb_map_leftreq")("smethodnb_map_leftreq")("methodnb_map_leftreq"))
+                     (LLSDArray(leftreq["b"])(rightdft["b"]))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freena_map_skipreq")("smethodna_map_skipreq")("methodna_map_skipreq"))
+                     (LLSDArray(skipreq["a"])(dft_map_partial["a"]))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freenb_map_skipreq")("smethodnb_map_skipreq")("methodnb_map_skipreq"))
+                     (LLSDArray(skipreq["b"])(dft_map_partial["b"]))) // required, optional
+
+                    // We only need mention the full-map-defaults ("_mdft" suffix)
+                    // registrations, having established their equivalence with the
+                    // full-array-defaults ("_adft" suffix) registrations in another test.
+                    (LLSDArray        // group
+                     (LLSDArray("freena_map_mdft")("smethodna_map_mdft")("methodna_map_mdft"))
+                     (LLSDArray(LLSD::emptyMap())(dft_map_full["a"]))) // required, optional
+
+                    (LLSDArray        // group
+                     (LLSDArray("freenb_map_mdft")("smethodnb_map_mdft")("methodnb_map_mdft"))
+                     (LLSDArray(LLSD::emptyMap())(dft_map_full["b"])))); // required, optional
+
+        foreach(LLSD grp, inArray(groups))
+        {
+            // Internal structure of each group in 'groups':
+            LLSD names(grp[0]);
+            LLSD required(grp[1][0]);
+            LLSD optional(grp[1][1]);
+            cout << "For " << names << ",\n" << "required:\n" << required << "\noptional:\n" << optional << std::endl;
+
+            // Loop through 'names'
+            foreach(LLSD nm, inArray(names))
+            {
+                LLSD metadata(getMetadata(nm));
+                ensure_equals("name mismatch", metadata["name"], nm);
+                ensure_equals(nm.asString(), metadata["desc"].asString(), descs[nm]);
+                ensure_equals(STRINGIZE(nm << " required mismatch"),
+                              metadata["required"], required);
+                ensure_equals(STRINGIZE(nm << " optional mismatch"),
+                              metadata["optional"], optional);
+            }
+        }
+    }
+
+    template<> template<>
+    void object::test<13>()
+    {
+        set_test_name("try_call()");
+        ensure("try_call(bogus name, LLSD()) returned true", ! work.try_call("freek", LLSD()));
+        ensure("try_call(bogus name) returned true", ! work.try_call(LLSDMap("op", "freek")));
+        ensure("try_call(real name, LLSD()) returned false", work.try_call("free0_array", LLSD()));
+        ensure("try_call(real name) returned false", work.try_call(LLSDMap("op", "free0_map")));
+    }
+
+    template<> template<>
+    void object::test<14>()
+    {
+        set_test_name("call with bad name");
+        call_exc("freek", LLSD(), "not found");
+        // We don't have a comparable helper function for the one-arg
+        // operator() method, and it's not worth building one just for this
+        // case. Write it out.
+        std::string threw;
+        try
+        {
+            work(LLSDMap("op", "freek"));
+        }
+        catch (const std::runtime_error& e)
+        {
+            cout << "*** " << e.what() << "\n";
+            threw = e.what();
+        }
+        ensure_has(threw, "bad");
+        ensure_has(threw, "op");
+        ensure_has(threw, "freek");
+    }
+
+    template<> template<>
+    void object::test<15>()
+    {
+        set_test_name("call with event key");
+        // We don't need a separate test for operator()(string, LLSD) with
+        // valid name, because all the rest of the tests exercise that case.
+        // The one we don't exercise elsewhere is operator()(LLSD) with valid
+        // name, so here it is.
+        work(LLSDMap("op", "free0_map"));
+        ensure_equals(g.i, 17);
+    }
+
+    // Cannot be defined inside function body... remind me again why we use C++...  :-P
+    struct CallablesTriple
+    {
+        std::string name, name_req;
+        LLSD& llsd;
+    };
+
+    template<> template<>
+    void object::test<16>()
+    {
+        set_test_name("call Callables");
+        CallablesTriple tests[] =
+        {
+            { "free1",     "free1_req",     g.llsd },
+            { "Dmethod1",  "Dmethod1_req",  work.llsd },
+            { "Dcmethod1", "Dcmethod1_req", work.llsd },
+            { "method1",   "method1_req",   v.llsd }
+        };
+        // Arbitrary LLSD value that we should be able to pass to Callables
+        // without 'required', but should not be able to pass to Callables
+        // with 'required'.
+        LLSD answer(42);
+        // LLSD value matching 'required' according to llsd_matches() rules.
+        LLSD matching(LLSDMap("d", 3.14)("array", LLSDArray("answer")(true)(answer)));
+        // Okay, walk through 'tests'.
+        foreach(const CallablesTriple& tr, tests)
+        {
+            // Should be able to pass 'answer' to Callables registered
+            // without 'required'.
+            work(tr.name, answer);
+            ensure_equals("answer mismatch", tr.llsd, answer);
+            // Should NOT be able to pass 'answer' to Callables registered
+            // with 'required'.
+            call_exc(tr.name_req, answer, "bad request");
+            // But SHOULD be able to pass 'matching' to Callables registered
+            // with 'required'.
+            work(tr.name_req, matching);
+            ensure_equals("matching mismatch", tr.llsd, matching);
+        }
+    }
+
+    template<> template<>
+    void object::test<17>()
+    {
+        set_test_name("passing wrong args to (map | array)-style registrations");
+
+        // Pass scalar/map to array-style functions, scalar/array to map-style
+        // functions. As that validation happens well before we engage the
+        // argument magic, it seems pointless to repeat this with every
+        // variation: (free function | non-static method), (no | arbitrary)
+        // args. We should only need to engage it for one map-style
+        // registration and one array-style registration.
+        std::string array_exc("needs an args array");
+        call_exc("free0_array", 17, array_exc);
+        call_exc("free0_array", LLSDMap("pi", 3.14), array_exc);
+
+        std::string map_exc("needs a map");
+        call_exc("free0_map", 17, map_exc);
+        // Passing an array to a map-style function works now! No longer an
+        // error case!
+//      call_exc("free0_map", LLSDArray("a")("b"), map_exc);
+    }
+
+    template<> template<>
+    void object::test<18>()
+    {
+        set_test_name("call no-args functions");
+        LLSD names(LLSDArray
+                   ("free0_array")("free0_map")
+                   ("smethod0_array")("smethod0_map")
+                   ("method0_array")("method0_map"));
+        foreach(LLSD name, inArray(names))
+        {
+            // Look up the Vars instance for this function.
+            Vars* vars(varsfor(name));
+            // Both the global and stack Vars instances are automatically
+            // cleared at the start of each test<n> method. But since we're
+            // calling these things several different times in the same
+            // test<n> method, manually reset the Vars between each.
+            *vars = Vars();
+            ensure_equals(vars->i, 0);
+            // call function with empty array (or LLSD(), should be equivalent)
+            work(name, LLSD());
+            ensure_equals(vars->i, 17);
+        }
+    }
+
+    // Break out this data because we use it in a couple different tests.
+    LLSD array_funcs(LLSDArray
+                     (LLSDMap("a", "freena_array")   ("b", "freenb_array"))
+                     (LLSDMap("a", "smethodna_array")("b", "smethodnb_array"))
+                     (LLSDMap("a", "methodna_array") ("b", "methodnb_array")));
+
+    template<> template<>
+    void object::test<19>()
+    {
+        set_test_name("call array-style functions with too-short arrays");
+        // Could have two different too-short arrays, one for *na and one for
+        // *nb, but since they both take 5 params...
+        LLSD tooshort(LLSDArray("this")("array")("too")("short"));
+        foreach(const LLSD& funcsab, inArray(array_funcs))
+        {
+            foreach(const llsd::MapEntry& e, inMap(funcsab))
+            {
+                call_exc(e.second, tooshort, "requires more arguments");
+            }
+        }
+    }
+
+    template<> template<>
+    void object::test<20>()
+    {
+        set_test_name("call array-style functions with (just right | too long) arrays");
+        std::vector<U8> binary;
+        for (size_t h(0x01), i(0); i < 5; h+= 0x22, ++i)
+        {
+            binary.push_back(h);
+        }
+        LLSD args(LLSDMap("a", LLSDArray(true)(17)(3.14)(123.456)("char*"))
+                         ("b", LLSDArray("string")
+                                        (LLUUID("01234567-89ab-cdef-0123-456789abcdef"))
+                                        (LLDate("2011-02-03T15:07:00Z"))
+                                        (LLURI("http://secondlife.com"))
+                                        (binary)));
+        LLSD argsplus(args);
+        argsplus["a"].append("bogus");
+        argsplus["b"].append("bogus");
+        LLSD expect;
+        foreach(LLSD::String a, ab)
+        {
+            expect[a] = zipmap(params[a], args[a]);
+        }
+        // Adjust expect["a"]["cp"] for special Vars::cp treatment.
+        expect["a"]["cp"] = std::string("'") + expect["a"]["cp"].asString() + "'";
+        cout << "expect: " << expect << '\n';
+
+        // Use substantially the same logic for args and argsplus
+        LLSD argsarrays(LLSDArray(args)(argsplus));
+        // So i==0 selects 'args', i==1 selects argsplus
+        for (LLSD::Integer i(0), iend(argsarrays.size()); i < iend; ++i)
+        {
+            foreach(const LLSD& funcsab, inArray(array_funcs))
+            {
+                foreach(LLSD::String a, ab)
+                {
+                    // Reset the Vars instance before each call
+                    Vars* vars(varsfor(funcsab[a]));
+                    *vars = Vars();
+                    work(funcsab[a], argsarrays[i][a]);
+                    ensure_llsd(STRINGIZE(funcsab[a].asString() <<
+                                          ": expect[\"" << a << "\"] mismatch"),
+                                vars->inspect(), expect[a], 7); // 7 bits ~= 2 decimal digits
+
+                    // TODO: in the i==1 or argsplus case, intercept LL_WARNS
+                    // output? Even without that, using argsplus verifies that
+                    // passing too many args isn't fatal; it works -- but
+                    // would be nice to notice the warning too.
+                }
+            }
+        }
+    }
+
+    template<> template<>
+    void object::test<21>()
+    {
+        set_test_name("verify that passing LLSD() to const char* sends NULL");
+
+        ensure_equals("Vars::cp init", v.cp, "");
+        work("methodna_map_mdft", LLSDMap("cp", LLSD()));
+        ensure_equals("passing LLSD()", v.cp, "NULL");
+        work("methodna_map_mdft", LLSDMap("cp", ""));
+        ensure_equals("passing \"\"", v.cp, "''");
+        work("methodna_map_mdft", LLSDMap("cp", "non-NULL"));
+        ensure_equals("passing \"non-NULL\"", v.cp, "'non-NULL'");
+    }
+
+    template<> template<>
+    void object::test<22>()
+    {
+        set_test_name("call map-style functions with (full | oversized) (arrays | maps)");
+        const char binary[] = "\x99\x88\x77\x66\x55";
+        LLSD array_full(LLSDMap
+                        ("a", LLSDArray(false)(255)(98.6)(1024.5)("pointer"))
+                        ("b", LLSDArray("object")(LLUUID::generateNewID())(LLDate::now())(LLURI("http://wiki.lindenlab.com/wiki"))(LLSD::Binary(boost::begin(binary), boost::end(binary)))));
+        LLSD array_overfull(array_full);
+        foreach(LLSD::String a, ab)
+        {
+            array_overfull[a].append("bogus");
+        }
+        cout << "array_full: " << array_full << "\narray_overfull: " << array_overfull << std::endl;
+        // We rather hope that LLDate::now() will generate a timestamp
+        // distinct from the one it generated in the constructor, moments ago.
+        ensure_not_equals("Timestamps too close",
+                          array_full["b"][2].asDate(), dft_array_full["b"][2].asDate());
+        // We /insist/ that LLUUID::generateNewID() do so.
+        ensure_not_equals("UUID collision",
+                          array_full["b"][1].asUUID(), dft_array_full["b"][1].asUUID());
+        LLSD map_full, map_overfull;
+        foreach(LLSD::String a, ab)
+        {
+            map_full[a] = zipmap(params[a], array_full[a]);
+            map_overfull[a] = map_full[a];
+            map_overfull[a]["extra"] = "ignore";
+        }
+        cout << "map_full: " << map_full << "\nmap_overfull: " << map_overfull << std::endl;
+        LLSD expect(map_full);
+        // Twiddle the const char* param.
+        expect["a"]["cp"] = std::string("'") + expect["a"]["cp"].asString() + "'";
+        // Another adjustment. For each data type, we're trying to distinguish
+        // three values: the Vars member's initial value (member wasn't
+        // stored; control never reached the set function), the registered
+        // default param value from dft_array_full, and the array_full value
+        // in this test. But bool can only distinguish two values. In this
+        // case, we want to differentiate the local array_full value from the
+        // dft_array_full value, so we use 'false'. However, that means
+        // Vars::inspect() doesn't differentiate it from the initial value,
+        // so won't bother returning it. Predict that behavior to match the
+        // LLSD values.
+        expect["a"].erase("b");
+        cout << "expect: " << expect << std::endl;
+        // For this test, calling functions registered with different sets of
+        // parameter defaults should make NO DIFFERENCE WHATSOEVER. Every call
+        // should pass all params.
+        LLSD names(LLSDMap
+                   ("a", LLSDArray
+                         ("freena_map_allreq") ("smethodna_map_allreq") ("methodna_map_allreq")
+                         ("freena_map_leftreq")("smethodna_map_leftreq")("methodna_map_leftreq")
+                         ("freena_map_skipreq")("smethodna_map_skipreq")("methodna_map_skipreq")
+                         ("freena_map_adft")   ("smethodna_map_adft")   ("methodna_map_adft")
+                         ("freena_map_mdft")   ("smethodna_map_mdft")   ("methodna_map_mdft"))
+                   ("b", LLSDArray
+                         ("freenb_map_allreq") ("smethodnb_map_allreq") ("methodnb_map_allreq")
+                         ("freenb_map_leftreq")("smethodnb_map_leftreq")("methodnb_map_leftreq")
+                         ("freenb_map_skipreq")("smethodnb_map_skipreq")("methodnb_map_skipreq")
+                         ("freenb_map_adft")   ("smethodnb_map_adft")   ("methodnb_map_adft")
+                         ("freenb_map_mdft")   ("smethodnb_map_mdft")   ("methodnb_map_mdft")));
+        // Treat (full | overfull) (array | map) the same.
+        LLSD argssets(LLSDArray(array_full)(array_overfull)(map_full)(map_overfull));
+        foreach(const LLSD& args, inArray(argssets))
+        {
+            foreach(LLSD::String a, ab)
+            {
+                foreach(LLSD::String name, inArray(names[a]))
+                {
+                    // Reset the Vars instance
+                    Vars* vars(varsfor(name));
+                    *vars = Vars();
+                    work(name, args[a]);
+                    ensure_llsd(STRINGIZE(name << ": expect[\"" << a << "\"] mismatch"),
+                                vars->inspect(), expect[a], 7); // 7 bits, 2 decimal digits
+                    // intercept LL_WARNS for the two overfull cases?
+                }
+            }
+        }
+    }
+} // namespace tut