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Copy pathEventsTests.cpp
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136 lines (112 loc) 路 3.33 KB
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/// @file
/// @brief Unit tests for the Python-free event registry (scripting/Events.h).
// Unit tests for the Python-free event registry (scripting/Events.h). The
// pybind11 bridge (modules/Events.h) and the game-side dispatch (ProcessEvent)
// need the game and are not unit tested; the registry logic is.
#include <gtest/gtest.h>
#include <stdexcept>
#include "Events.h"
namespace
{
using Events::Type;
/// Fixture that clears the global event registry around every test for isolation.
class EventsTest : public ::testing::Test
{
protected:
void SetUp() override { Events::Clear(); }
void TearDown() override { Events::Clear(); }
};
TEST_F(EventsTest, DispatchCallsRegisteredHandler)
{
int count = 0;
Events::Register(Type::Render, [&]
{ count++; });
Events::Dispatch(Type::Render);
EXPECT_EQ(1, count);
}
TEST_F(EventsTest, DispatchCallsEveryHandlerForTheEvent)
{
int a = 0, b = 0;
Events::Register(Type::Render, [&]
{ a++; });
Events::Register(Type::Render, [&]
{ b++; });
Events::Dispatch(Type::Render);
EXPECT_EQ(1, a);
EXPECT_EQ(1, b);
}
TEST_F(EventsTest, HandlersAreScopedToTheirEvent)
{
int render = 0, shutdown = 0;
Events::Register(Type::Render, [&]
{ render++; });
Events::Register(Type::Shutdown, [&]
{ shutdown++; });
Events::Dispatch(Type::Render);
EXPECT_EQ(1, render);
EXPECT_EQ(0, shutdown);
}
TEST_F(EventsTest, DispatchEventWithNoHandlersIsNoop)
{
EXPECT_NO_THROW(Events::Dispatch(Type::LoadIntoMap));
}
TEST_F(EventsTest, HasHandlersAndEmpty)
{
EXPECT_TRUE(Events::Empty());
EXPECT_FALSE(Events::HasHandlers(Type::Render));
Events::Register(Type::Render, [] {});
EXPECT_FALSE(Events::Empty());
EXPECT_TRUE(Events::HasHandlers(Type::Render));
EXPECT_FALSE(Events::HasHandlers(Type::Shutdown));
}
TEST_F(EventsTest, ThrowingHandlerIsContainedAndOthersStillRun)
{
int after = 0;
Events::Register(Type::Render, []
{ throw std::runtime_error("boom"); });
Events::Register(Type::Render, [&]
{ after++; });
EXPECT_NO_THROW(Events::Dispatch(Type::Render));
EXPECT_EQ(1, after);
}
TEST_F(EventsTest, ClearRemovesHandlers)
{
Events::Register(Type::Render, [] {});
Events::Clear();
EXPECT_TRUE(Events::Empty());
}
TEST_F(EventsTest, UnregisterRemovesOnlyThatHandler)
{
int keptCalls = 0;
int removedCalls = 0;
const int keptId = Events::Register(Type::Render, [&]
{ keptCalls++; });
const int removedId = Events::Register(Type::Render, [&]
{ removedCalls++; });
EXPECT_NE(keptId, removedId);
Events::Dispatch(Type::Render);
EXPECT_EQ(1, keptCalls);
EXPECT_EQ(1, removedCalls);
Events::Unregister(removedId);
Events::Dispatch(Type::Render);
EXPECT_EQ(2, keptCalls); // still fires
EXPECT_EQ(1, removedCalls); // no longer fires
EXPECT_NO_THROW(Events::Unregister(removedId)); // removing again is a no-op
}
TEST_F(EventsTest, DispatchPassesPayloadToHandlers)
{
void* gotSource = nullptr;
float gotValue = 0.f;
int marker = 42;
Events::Register(Type::Render, [&](const Events::Payload& p)
{
gotSource = p.source;
gotValue = p.value; });
Events::Payload payload;
payload.source = ▮
payload.value = 1.5f;
Events::Dispatch(Type::Render, payload);
EXPECT_EQ(&marker, gotSource);
EXPECT_FLOAT_EQ(1.5f, gotValue);
}
} // namespace