448 lines
10 KiB
Go
448 lines
10 KiB
Go
package img
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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/gif"
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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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"github.com/spf13/afero"
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"github.com/stretchr/testify/require"
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"golang.org/x/image/bmp"
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"golang.org/x/image/tiff"
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)
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func TestService_Resize(t *testing.T) {
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testCases := map[string]struct {
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options []Option
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width int
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height int
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source func(t *testing.T) afero.File
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matcher func(t *testing.T, reader io.Reader)
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wantErr bool
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}{
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"fill upscale": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 50, 20)
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},
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matcher: sizeMatcher(100, 100),
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},
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"fill downscale": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"fit upscale": {
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options: []Option{WithMode(ResizeModeFit)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 50, 20)
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},
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matcher: sizeMatcher(50, 20),
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},
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"fit downscale": {
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options: []Option{WithMode(ResizeModeFit)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 75),
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},
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"keep original format": {
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options: []Option{},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayPng(t, 200, 150)
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},
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matcher: formatMatcher(FormatPng),
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},
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"convert to jpeg": {
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options: []Option{WithFormat(FormatJpeg)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatJpeg),
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},
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"convert to png": {
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options: []Option{WithFormat(FormatPng)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatPng),
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},
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"convert to gif": {
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options: []Option{WithFormat(FormatGif)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatGif),
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},
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"convert to tiff": {
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options: []Option{WithFormat(FormatTiff)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatTiff),
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},
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"convert to bmp": {
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options: []Option{WithFormat(FormatBmp)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatBmp),
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},
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"convert to unknown": {
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options: []Option{WithFormat(Format(-1))},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: formatMatcher(FormatJpeg),
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},
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"resize png": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayPng(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize gif": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayGif(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize tiff": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayTiff(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize bmp": {
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options: []Option{WithMode(ResizeModeFill)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayBmp(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize with high quality": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityHigh)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize with medium quality": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityMedium)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize with low quality": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityLow)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize with unknown quality": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(Quality(-1))},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return newGrayJpeg(t, 200, 150)
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},
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matcher: sizeMatcher(100, 100),
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},
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"get thumbnail from file with APP0 JFIF": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityLow)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return openFile(t, "testdata/gray-sample.jpg")
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},
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matcher: sizeMatcher(125, 128),
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},
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"get thumbnail from file without APP0 JFIF": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityLow)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return openFile(t, "testdata/20130612_142406.jpg")
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},
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matcher: sizeMatcher(320, 240),
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},
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"resize from file without IFD1 thumbnail": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityLow)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return openFile(t, "testdata/IMG_2578.JPG")
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},
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matcher: sizeMatcher(100, 100),
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},
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"resize for higher quality levels": {
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options: []Option{WithMode(ResizeModeFill), WithQuality(QualityMedium)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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return openFile(t, "testdata/gray-sample.jpg")
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},
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matcher: sizeMatcher(100, 100),
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},
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"broken file": {
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options: []Option{WithMode(ResizeModeFit)},
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width: 100,
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height: 100,
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source: func(t *testing.T) afero.File {
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t.Helper()
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.jpg")
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require.NoError(t, err)
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_, err = file.WriteString("this is not an image")
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require.NoError(t, err)
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return file
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},
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wantErr: true,
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},
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}
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for name, test := range testCases {
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t.Run(name, func(t *testing.T) {
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svc := New(1)
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source := test.source(t)
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defer source.Close()
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buf := &bytes.Buffer{}
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err := svc.Resize(context.Background(), source, test.width, test.height, buf, test.options...)
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if (err != nil) != test.wantErr {
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t.Fatalf("GetMarketSpecs() error = %v, wantErr %v", err, test.wantErr)
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}
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if err != nil {
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return
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}
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test.matcher(t, buf)
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})
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}
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}
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func sizeMatcher(width, height int) func(t *testing.T, reader io.Reader) {
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return func(t *testing.T, reader io.Reader) {
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resizedImg, _, err := image.Decode(reader)
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require.NoError(t, err)
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require.Equal(t, width, resizedImg.Bounds().Dx())
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require.Equal(t, height, resizedImg.Bounds().Dy())
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}
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}
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func formatMatcher(format Format) func(t *testing.T, reader io.Reader) {
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return func(t *testing.T, reader io.Reader) {
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_, decodedFormat, err := image.DecodeConfig(reader)
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require.NoError(t, err)
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require.Equal(t, format.String(), decodedFormat)
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}
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}
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func newGrayJpeg(t *testing.T, width, height int) afero.File {
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.jpg")
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require.NoError(t, err)
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img := image.NewGray(image.Rect(0, 0, width, height))
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err = jpeg.Encode(file, img, &jpeg.Options{Quality: 90})
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require.NoError(t, err)
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_, err = file.Seek(0, io.SeekStart)
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require.NoError(t, err)
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return file
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}
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func newGrayPng(t *testing.T, width, height int) afero.File {
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.png")
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require.NoError(t, err)
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img := image.NewGray(image.Rect(0, 0, width, height))
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err = png.Encode(file, img)
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require.NoError(t, err)
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_, err = file.Seek(0, io.SeekStart)
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require.NoError(t, err)
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return file
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}
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func newGrayGif(t *testing.T, width, height int) afero.File {
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.gif")
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require.NoError(t, err)
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img := image.NewGray(image.Rect(0, 0, width, height))
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err = gif.Encode(file, img, nil)
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require.NoError(t, err)
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_, err = file.Seek(0, io.SeekStart)
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require.NoError(t, err)
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return file
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}
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func newGrayTiff(t *testing.T, width, height int) afero.File {
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.tiff")
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require.NoError(t, err)
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img := image.NewGray(image.Rect(0, 0, width, height))
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err = tiff.Encode(file, img, nil)
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require.NoError(t, err)
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_, err = file.Seek(0, io.SeekStart)
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require.NoError(t, err)
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return file
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}
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func newGrayBmp(t *testing.T, width, height int) afero.File {
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fs := afero.NewMemMapFs()
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file, err := fs.Create("image.bmp")
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require.NoError(t, err)
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img := image.NewGray(image.Rect(0, 0, width, height))
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err = bmp.Encode(file, img)
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require.NoError(t, err)
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_, err = file.Seek(0, io.SeekStart)
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require.NoError(t, err)
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return file
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}
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func openFile(t *testing.T, name string) afero.File {
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appfs := afero.NewOsFs()
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file, err := appfs.Open(name)
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require.NoError(t, err)
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return file
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}
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func TestService_FormatFromExtension(t *testing.T) {
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testCases := map[string]struct {
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ext string
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want Format
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wantErr error
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}{
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"jpg": {
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ext: ".jpg",
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want: FormatJpeg,
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},
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"jpeg": {
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ext: ".jpeg",
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want: FormatJpeg,
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},
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"png": {
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ext: ".png",
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want: FormatPng,
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},
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"gif": {
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ext: ".gif",
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want: FormatGif,
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},
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"tiff": {
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ext: ".tiff",
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want: FormatTiff,
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},
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"bmp": {
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ext: ".bmp",
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want: FormatBmp,
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},
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"unknown": {
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ext: ".mov",
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wantErr: ErrUnsupportedFormat,
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},
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}
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for name, test := range testCases {
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t.Run(name, func(t *testing.T) {
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svc := New(1)
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got, err := svc.FormatFromExtension(test.ext)
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require.Truef(t, errors.Is(err, test.wantErr), "error = %v, wantErr %v", err, test.wantErr)
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if err != nil {
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return
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}
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require.Equal(t, test.want, got)
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})
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}
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}
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