public String[] baz(String bar) { return new String[] {bar}; }
                }
            """
        ) {
            assertHasNoError()
            assertHasWarnings(
                "Method com.example.Source.foo(java.lang.String): Return nullability changed from null-unmarked to non-nullable",

        }

        fun assertHasErrors(vararg errors: String) {
            assertThat("Has errors", richReport.errors.map { it.message }, inAnyOrder(errors))
        }

        fun assertHasWarnings(vararg warnings: String) {
            assertThat("Has warnings", richReport.warnings.map { it.message }, inAnyOrder(warnings))
        }

        fun assertHasInformation(vararg information: String) {