!oldObjFile.file
        newObjFile.file

        and:
        try {
            assert staticLibrary("build/libs/hello/static/hello").listObjectFiles().contains(newObjFile.name)
            assert !staticLibrary("build/libs/hello/static/hello").listObjectFiles().contains(oldObjFile.name)
        } catch (UnsupportedOperationException ignored) {
            // Toolchain doesn't support this.
        }
    }