Method filenames

cli/command/image/build_test.go:207–216

(t *testing.T)

}

func (f *fakeBuild) filenames(t *testing.T) []string {
	t.Helper()
	h := f.headers(t)
	names := make([]string, 0, len(h))
	for _, header := range h {
		names = append(names, header.Name)
	}
	sort.Strings(names)
	return names
}