Function TestReadFileAnyPrefersPreferred

pkg/platform/yaml/codec_test.go:502–542

TestReadFileAnyPrefersPreferred verifies ReadFileAny picks the preferred format when both files exist.

(t *testing.T)

// TestReadFileAnyPrefersPreferred verifies ReadFileAny picks the preferred
// format when both files exist.
func TestReadFileAnyPrefersPreferred(t *testing.T) {
	ctx := context.Background()
	logger := testLogger()

	tempDir, err := os.MkdirTemp("", "readfile_any_prefer_test")
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(tempDir)

	if err := os.WriteFile(filepath.Join(tempDir, "f.yaml"), []byte("y: 1"), 0644); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(tempDir, "f.json"), []byte(`{"j":1}`), 0644); err != nil {
		t.Fatal(err)
	}

	// Prefer JSON -> should return .json contents
	data, detected, err := ReadFileAny(ctx, logger, tempDir, "f", FormatJSON)
	if err != nil {
		t.Fatal(err)
	}
	if detected != FormatJSON {
		t.Errorf("detected = %v, want FormatJSON", detected)
	}
	if string(data) != `{"j":1}` {
		t.Errorf("data = %q", data)
	}

	// Prefer YAML -> should return .yaml contents
	data, detected, err = ReadFileAny(ctx, logger, tempDir, "f", FormatYAML)
	if err != nil {
		t.Fatal(err)
	}
	if detected != FormatYAML {
		t.Errorf("detected = %v, want FormatYAML", detected)
	}
	if string(data) != "y: 1" {
		t.Errorf("data = %q", data)
	}
}

// TestReadFileAnyFallsBack verifies ReadFileAny falls back to the other
// format when the preferred one is missing — this is the backward-compat