sneak
0c9eb35bd2
TDD: This test expects WebP encoding to succeed. It currently fails because WebP encoding is not implemented (returns ErrUnsupportedOutputFormat). The test will pass once we add the gen2brain/webp library.
381 lines
8.7 KiB
Go
381 lines
8.7 KiB
Go
package imgcache
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import (
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"bytes"
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"context"
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"errors"
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"image"
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"image/color"
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"image/jpeg"
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"image/png"
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"io"
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"testing"
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)
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// createTestJPEG creates a simple test JPEG image.
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func createTestJPEG(t *testing.T, width, height int) []byte {
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t.Helper()
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img := image.NewRGBA(image.Rect(0, 0, width, height))
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// Fill with a gradient
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for y := 0; y < height; y++ {
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for x := 0; x < width; x++ {
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img.Set(x, y, color.RGBA{
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R: uint8(x * 255 / width),
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G: uint8(y * 255 / height),
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B: 128,
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A: 255,
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})
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}
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}
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var buf bytes.Buffer
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if err := jpeg.Encode(&buf, img, &jpeg.Options{Quality: 90}); err != nil {
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t.Fatalf("failed to encode test JPEG: %v", err)
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}
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return buf.Bytes()
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}
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// createTestPNG creates a simple test PNG image.
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func createTestPNG(t *testing.T, width, height int) []byte {
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t.Helper()
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img := image.NewRGBA(image.Rect(0, 0, width, height))
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for y := 0; y < height; y++ {
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for x := 0; x < width; x++ {
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img.Set(x, y, color.RGBA{
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R: uint8(x * 255 / width),
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G: uint8(y * 255 / height),
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B: 128,
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A: 255,
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})
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}
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}
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var buf bytes.Buffer
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if err := png.Encode(&buf, img); err != nil {
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t.Fatalf("failed to encode test PNG: %v", err)
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}
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return buf.Bytes()
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}
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func TestImageProcessor_ResizeJPEG(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestJPEG(t, 800, 600)
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req := &ImageRequest{
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Size: Size{Width: 400, Height: 300},
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v", err)
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}
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defer result.Content.Close()
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if result.Width != 400 {
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t.Errorf("Process() width = %d, want 400", result.Width)
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}
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if result.Height != 300 {
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t.Errorf("Process() height = %d, want 300", result.Height)
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}
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if result.ContentLength == 0 {
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t.Error("Process() returned zero content length")
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}
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// Verify it's valid JPEG by reading the content
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data, err := io.ReadAll(result.Content)
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if err != nil {
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t.Fatalf("failed to read result: %v", err)
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}
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mime, err := DetectFormat(data)
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if err != nil {
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t.Fatalf("DetectFormat() error = %v", err)
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}
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if mime != MIMETypeJPEG {
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t.Errorf("Output format = %v, want %v", mime, MIMETypeJPEG)
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}
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}
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func TestImageProcessor_ConvertToPNG(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestJPEG(t, 200, 150)
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req := &ImageRequest{
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Size: Size{Width: 200, Height: 150},
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Format: FormatPNG,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v", err)
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}
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defer result.Content.Close()
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data, err := io.ReadAll(result.Content)
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if err != nil {
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t.Fatalf("failed to read result: %v", err)
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}
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mime, err := DetectFormat(data)
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if err != nil {
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t.Fatalf("DetectFormat() error = %v", err)
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}
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if mime != MIMETypePNG {
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t.Errorf("Output format = %v, want %v", mime, MIMETypePNG)
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}
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}
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func TestImageProcessor_OriginalSize(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestJPEG(t, 640, 480)
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req := &ImageRequest{
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Size: Size{Width: 0, Height: 0}, // Original size
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v", err)
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}
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defer result.Content.Close()
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if result.Width != 640 {
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t.Errorf("Process() width = %d, want 640", result.Width)
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}
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if result.Height != 480 {
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t.Errorf("Process() height = %d, want 480", result.Height)
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}
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}
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func TestImageProcessor_FitContain(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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// 800x400 image (2:1 aspect) into 400x400 box with contain
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// Should result in 400x200 (maintaining aspect ratio)
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input := createTestJPEG(t, 800, 400)
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req := &ImageRequest{
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Size: Size{Width: 400, Height: 400},
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitContain,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v", err)
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}
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defer result.Content.Close()
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// With contain, the image should fit within the box
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if result.Width > 400 || result.Height > 400 {
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t.Errorf("Process() size %dx%d exceeds 400x400 box", result.Width, result.Height)
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}
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}
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func TestImageProcessor_ProcessPNG(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestPNG(t, 400, 300)
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req := &ImageRequest{
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Size: Size{Width: 200, Height: 150},
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Format: FormatPNG,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v", err)
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}
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defer result.Content.Close()
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if result.Width != 200 {
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t.Errorf("Process() width = %d, want 200", result.Width)
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}
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if result.Height != 150 {
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t.Errorf("Process() height = %d, want 150", result.Height)
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}
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}
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func TestImageProcessor_ImplementsInterface(t *testing.T) {
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// Verify ImageProcessor implements Processor interface
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var _ Processor = (*ImageProcessor)(nil)
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}
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func TestImageProcessor_SupportedFormats(t *testing.T) {
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proc := NewImageProcessor()
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inputFormats := proc.SupportedInputFormats()
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if len(inputFormats) == 0 {
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t.Error("SupportedInputFormats() returned empty slice")
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}
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outputFormats := proc.SupportedOutputFormats()
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if len(outputFormats) == 0 {
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t.Error("SupportedOutputFormats() returned empty slice")
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}
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}
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func TestImageProcessor_RejectsOversizedInput(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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// Create an image that exceeds MaxInputDimension (e.g., 10000x100)
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// This should be rejected before processing to prevent DoS
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input := createTestJPEG(t, 10000, 100)
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req := &ImageRequest{
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Size: Size{Width: 100, Height: 100},
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitCover,
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}
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_, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err == nil {
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t.Error("Process() should reject oversized input images")
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}
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if err != ErrInputTooLarge {
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t.Errorf("Process() error = %v, want ErrInputTooLarge", err)
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}
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}
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func TestImageProcessor_RejectsOversizedInputHeight(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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// Create an image with oversized height
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input := createTestJPEG(t, 100, 10000)
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req := &ImageRequest{
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Size: Size{Width: 100, Height: 100},
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitCover,
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}
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_, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err == nil {
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t.Error("Process() should reject oversized input images")
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}
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if err != ErrInputTooLarge {
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t.Errorf("Process() error = %v, want ErrInputTooLarge", err)
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}
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}
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func TestImageProcessor_AcceptsMaxDimensionInput(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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// Create an image at exactly MaxInputDimension - should be accepted
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// Using smaller dimensions to keep test fast
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input := createTestJPEG(t, MaxInputDimension, 100)
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req := &ImageRequest{
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Size: Size{Width: 100, Height: 100},
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Format: FormatJPEG,
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Quality: 85,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() should accept images at MaxInputDimension, got error: %v", err)
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}
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defer result.Content.Close()
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}
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func TestImageProcessor_EncodeWebP(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestJPEG(t, 200, 150)
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req := &ImageRequest{
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Size: Size{Width: 100, Height: 75},
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Format: FormatWebP,
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Quality: 80,
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FitMode: FitCover,
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}
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result, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err != nil {
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t.Fatalf("Process() error = %v, want nil", err)
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}
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defer result.Content.Close()
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// Verify output is valid WebP
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data, err := io.ReadAll(result.Content)
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if err != nil {
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t.Fatalf("failed to read result: %v", err)
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}
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mime, err := DetectFormat(data)
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if err != nil {
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t.Fatalf("DetectFormat() error = %v", err)
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}
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if mime != MIMETypeWebP {
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t.Errorf("Output format = %v, want %v", mime, MIMETypeWebP)
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}
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// Verify dimensions
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if result.Width != 100 {
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t.Errorf("Width = %d, want 100", result.Width)
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}
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if result.Height != 75 {
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t.Errorf("Height = %d, want 75", result.Height)
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}
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}
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func TestImageProcessor_RejectsUnsupportedOutputFormat_AVIF(t *testing.T) {
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proc := NewImageProcessor()
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ctx := context.Background()
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input := createTestJPEG(t, 200, 150)
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req := &ImageRequest{
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Size: Size{Width: 100, Height: 75},
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Format: FormatAVIF,
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Quality: 85,
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FitMode: FitCover,
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}
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_, err := proc.Process(ctx, bytes.NewReader(input), req)
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if err == nil {
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t.Fatal("Process() should return error for unsupported AVIF encoding")
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}
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if !errors.Is(err, ErrUnsupportedOutputFormat) {
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t.Errorf("Process() error = %v, want ErrUnsupportedOutputFormat", err)
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}
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}
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