"Method com.example.Source.getSomeVar(): From non-null returning to null returning breaking change."
            )
            assertHasWarnings(
                "Method com.example.Source.setSomeVar(java.lang.String): Parameter 0 nullability changed from non-nullable to nullable"
            )
            assertHasNoInformation()
        }
    }

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

                    public String foo(String bar) { return bar; }
                }
            """
        ) {
            assertHasNoError()
            assertHasWarnings(
                "Field finalField: Nullability changed from nullable to non-nullable",
                "Method com.example.Source.foo(java.lang.String): Return nullability changed from nullable to non-nullable"
            )

                    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) {