func TestMyFunction(t *testing.T) { mockDB := &MyDatabaseMock{} ctx := Context{"DB": mockDB} result := MyFunction(ctx) // Verify that the correct result was returned if result != expected { t.Errorf("Expected %v, but got %v", expected, result) } // Verify that the database mock was used correctly // ... }In this example, `MyFunction` takes a `Context` object as a parameter, and uses it to access a `MyDatabase` instance. In the test, we create a mock `MyDatabase` instance (`MyDatabaseMock`) and inject it into the `Context` as the value for the `"DB"` key. We also set up expectations for the mock object, and then call `MyFunction` with the `Context`. Finally, we verify that the result is what we expect, and that the mock object was used correctly. Overall, `Context` provides a powerful tool for testing code that relies on external dependencies, and helps to ensure that code behaves as expected in a variety of scenarios.