gotools/gopls/internal/test/integration/misc/failures_test.go

// This is a slight variant of TestHoverOnError in definition_test.go
// that includes a line directive, which makes no difference since
// gopls ignores line directives.
func TestHoverFailure(t *testing.T) { … }

// This test demonstrates a case where gopls is not at all confused by
// line directives, because it completely ignores them.
func TestFailingDiagnosticClearingOnEdit(t *testing.T) { … }