Custom During Filters

Top Previous Next

Custom During Lambda Filter

Use custom lambda for conditions not covered by built-ins.

The lambda sends a DuringContext argument that you can use.

DuringContext contains the following:

1.	PCSTR GetCallingModule(): Returns the current module.

2.	TID GetThreadId(): Returns the current thread.

3.	void IgnoreHigherLevels(): Precedence: Call > Instance > Suite, use IgnoreHigherLevels() to stop broader filters from applying.

4.	std::vector<CallStackFrame> GetCallStack(): Returns a vector with retrieved call stack.

Here is an example for using GetThreadId:

TEST(DuringTests, FilterByThreadIdWithCustomLambda)

{

auto id = GetCurrentThreadId();

auto a = Isolator(During([=](DuringContext& context)

{

return context.GetThreadId() == id;

}));

auto fake = a.Fake.Instance<Person>();

// This is restricted to getName called within current thread

a.CallTo(fake->GetName()).WillReturn("John");

auto res = fake->GetName();

ASSERT_TRUE(strcmp(res, "John") == 0);

}

Note: It's possible to put any condition within the lambda.