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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| package stegano | ||
|
|
||
| import ( | ||
| "image" | ||
| "image/color" | ||
| "os" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| // Mock function to create a test image | ||
| func createTestImage() image.Image { | ||
| width, height := 100, 100 | ||
| img := image.NewRGBA(image.Rect(0, 0, width, height)) | ||
| // Fill with some color | ||
| for x := 0; x < width; x++ { | ||
| for y := 0; y < height; y++ { | ||
| img.Set(x, y, color.RGBA{R: 255, G: 0, B: 0, A: 255}) | ||
| } | ||
| } | ||
| return img | ||
| } | ||
|
|
||
| func TestEncodeAndSave_Valid(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := []byte("some secret data") | ||
| bitDepth := uint8(3) | ||
| outputFilename := "test_output.jpg" | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
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||
| // Test if no error occurred and file was created | ||
| require.NoError(t, err) | ||
|
|
||
| // Check if output file exists | ||
| _, err = os.Stat(outputFilename) | ||
| require.NoError(t, err) | ||
|
|
||
| // Cleanup | ||
| defer os.Remove(outputFilename) | ||
| } | ||
|
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||
| func TestEncodeAndSave_EmptyData(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := []byte{} | ||
| bitDepth := uint8(3) | ||
| outputFilename := "test_output.jpg" | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
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||
| // Test if the correct error is returned | ||
| assert.Error(t, err) | ||
| assert.Contains(t, err.Error(), "data is empty") | ||
| } | ||
|
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| func TestEncodeAndSave_DataTooLarge(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := make([]byte, 10000) // This is more data than the image can hold | ||
| bitDepth := uint8(3) | ||
| outputFilename := "test_output.jpg" | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
|
||
| // Test if the correct error is returned | ||
| assert.Error(t, err) | ||
| assert.Contains(t, err.Error(), "data is too large to embed") | ||
| } | ||
|
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||
| func TestEncodeAndSave_CompressedData(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := []byte("compressed test data") | ||
| bitDepth := uint8(3) | ||
| outputFilename := "test_compressed_output.jpg" | ||
|
|
||
| // Execute with compression enabled | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, true) | ||
|
|
||
| // Test if no error occurred and file was created | ||
| require.NoError(t, err) | ||
|
|
||
| // Check if output file exists | ||
| _, err = os.Stat(outputFilename) | ||
| require.NoError(t, err) | ||
|
|
||
| // Cleanup | ||
| defer os.Remove(outputFilename) | ||
| } | ||
|
|
||
| func TestEncodeAndSave_InvalidFileCreation(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := []byte("test data") | ||
| bitDepth := uint8(3) | ||
| outputFilename := "/invalid/path/test_output.jpg" // Invalid path | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
|
||
| // Test if the correct error is returned | ||
| assert.Error(t, err) | ||
| assert.Contains(t, err.Error(), "failed to create output file") | ||
| } | ||
|
|
||
| func TestEncodeAndSave_SuccessWithSpecificFilename(t *testing.T) { | ||
| // Setup | ||
| coverImage := createTestImage() | ||
| data := []byte("another test data") | ||
| bitDepth := uint8(3) | ||
| outputFilename := "specific_output.jpg" | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
|
||
| // Test if no error occurred and file was created | ||
| require.NoError(t, err) | ||
|
|
||
| // Check if the output file exists | ||
| _, err = os.Stat(outputFilename) | ||
| require.NoError(t, err) | ||
|
|
||
| // Cleanup | ||
| defer os.Remove(outputFilename) | ||
| } | ||
|
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| func TestEncodeAndSave_NullImage(t *testing.T) { | ||
| // Setup | ||
| var coverImage image.Image = nil | ||
| data := []byte("some data") | ||
| bitDepth := uint8(3) | ||
| outputFilename := "test_output.jpg" | ||
|
|
||
| // Execute | ||
| handler := &ImageHandler{} | ||
| err := handler.EncodeAndSave(coverImage, data, bitDepth, outputFilename, false) | ||
|
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||
| // Test if the correct error is returned | ||
| assert.Error(t, err) | ||
| } |
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