1 files changed, 136 insertions, 0 deletions
diff --git a/indra/llcommon/tests/lazyeventapi_test.cpp b/indra/llcommon/tests/lazyeventapi_test.cpp
new file mode 100644
index 0000000000..31b2d6d17f
--- /dev/null
+++ b/indra/llcommon/tests/lazyeventapi_test.cpp
@@ -0,0 +1,136 @@
+/**
+ * @file   lazyeventapi_test.cpp
+ * @author Nat Goodspeed
+ * @date   2022-06-18
+ * @brief  Test for lazyeventapi.
+ * 
+ * $LicenseInfo:firstyear=2022&license=viewerlgpl$
+ * Copyright (c) 2022, Linden Research, Inc.
+ * $/LicenseInfo$
+ */
+
+// Precompiled header
+#include "linden_common.h"
+// associated header
+#include "lazyeventapi.h"
+// STL headers
+// std headers
+// external library headers
+// other Linden headers
+#include "../test/lltut.h"
+#include "llevents.h"
+#include "llsdutil.h"
+
+// observable side effect, solely for testing
+static LLSD data;
+
+// LLEventAPI listener subclass
+class MyListener: public LLEventAPI
+{
+public:
+    // need this trivial forwarding constructor
+    // (of course do any other initialization your subclass requires)
+    MyListener(const LL::LazyEventAPIParams& params):
+        LLEventAPI(params)
+    {}
+
+    // example operation, registered by LazyEventAPI subclass below
+    void set_data(const LLSD& event)
+    {
+        data = event["data"];
+    }
+};
+
+// LazyEventAPI registrar subclass
+class MyRegistrar: public LL::LazyEventAPI<MyListener>
+{
+    using super = LL::LazyEventAPI<MyListener>;
+    using super::listener;
+public:
+    // LazyEventAPI subclass initializes like a classic LLEventAPI subclass
+    // constructor, with API name and desc plus add() calls for the defined
+    // operations
+    MyRegistrar():
+        super("Test", "This is a test LLEventAPI")
+    {
+        add("set", "This is a set operation", &listener::set_data);
+    }
+};
+// Normally we'd declare a static instance of MyRegistrar -- but because we
+// want to test both with and without, defer declaration to individual test
+// methods.
+
+/*****************************************************************************
+*   TUT
+*****************************************************************************/
+namespace tut
+{
+    struct lazyeventapi_data
+    {
+        lazyeventapi_data()
+        {
+            // before every test, reset 'data'
+            data.clear();
+        }
+        ~lazyeventapi_data()
+        {
+            // after every test, reset LLEventPumps
+            LLEventPumps::deleteSingleton();
+        }
+    };
+    typedef test_group<lazyeventapi_data> lazyeventapi_group;
+    typedef lazyeventapi_group::object object;
+    lazyeventapi_group lazyeventapigrp("lazyeventapi");
+
+    template<> template<>
+    void object::test<1>()
+    {
+        set_test_name("LazyEventAPI");
+        // this is where the magic (should) happen
+        // 'register' still a keyword until C++17
+        MyRegistrar regster;
+        LLEventPumps::instance().obtain("Test").post(llsd::map("op", "set", "data", "hey"));
+        ensure_equals("failed to set data", data.asString(), "hey");
+    }
+
+    template<> template<>
+    void object::test<2>()
+    {
+        set_test_name("No LazyEventAPI");
+        // Because the MyRegistrar declaration in test<1>() is local, because
+        // it has been destroyed, we fully expect NOT to reach a MyListener
+        // instance with this post.
+        LLEventPumps::instance().obtain("Test").post(llsd::map("op", "set", "data", "moot"));
+        ensure("accidentally set data", ! data.isDefined());
+    }
+
+    template<> template<>
+    void object::test<3>()
+    {
+        set_test_name("LazyEventAPI metadata");
+        MyRegistrar regster;
+        // Of course we have 'regster' in hand; we don't need to search for
+        // it. But this next test verifies that we can find (all) LazyEventAPI
+        // instances using LazyEventAPIBase::instance_snapshot. Normally we
+        // wouldn't search; normally we'd just look at each instance in the
+        // loop body.
+        const MyRegistrar* found = nullptr;
+        for (const auto& registrar : LL::LazyEventAPIBase::instance_snapshot())
+            if ((found = dynamic_cast<const MyRegistrar*>(&registrar)))
+                break;
+        ensure("Failed to find MyRegistrar via LLInstanceTracker", found);
+
+        ensure_equals("wrong API name", found->getName(), "Test");
+        ensure_contains("wrong API desc", found->getDesc(), "test LLEventAPI");
+        ensure_equals("wrong API field", found->getDispatchKey(), "op");
+        // Normally we'd just iterate over *found. But for test purposes,
+        // actually capture the range of NameDesc pairs in a vector.
+        std::vector<LL::LazyEventAPIBase::NameDesc> ops{ found->begin(), found->end() };
+        ensure_equals("failed to find operations", ops.size(), 1);
+        ensure_equals("wrong operation name", ops[0].first, "set");
+        ensure_contains("wrong operation desc", ops[0].second, "set operation");
+        LLSD metadata{ found->getMetadata(ops[0].first) };
+        ensure_equals("bad metadata name", metadata["name"].asString(), ops[0].first);
+        ensure_equals("bad metadata desc", metadata["desc"].asString(), ops[0].second);
+    }
+} // namespace tut