96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
package application
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import (
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"bytes"
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"testing"
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)
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func TestApplyAnnotationsDrawsIntoPNG(t *testing.T) {
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src := image.NewRGBA(image.Rect(0, 0, 40, 40))
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draw.Draw(src, src.Bounds(), &image.Uniform{C: color.White}, image.Point{}, draw.Src)
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var buf bytes.Buffer
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if err := png.Encode(&buf, src); err != nil {
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t.Fatalf("encode source: %v", err)
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}
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out, err := ApplyAnnotations(buf.Bytes(), []Annotation{
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{
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Tool: "rect",
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Color: "#ef4444",
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Points: []Point{
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{X: 5, Y: 5},
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{X: 30, Y: 30},
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},
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},
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}, 1)
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if err != nil {
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t.Fatalf("apply annotations: %v", err)
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}
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img, err := png.Decode(bytes.NewReader(out))
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if err != nil {
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t.Fatalf("decode output: %v", err)
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}
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if got := color.RGBAModel.Convert(img.At(5, 5)).(color.RGBA); got.R != 0xef || got.G != 0x44 || got.B != 0x44 {
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t.Fatalf("expected annotated pixel at rectangle edge, got %#v", got)
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}
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}
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func TestApplyAnnotationsNoAnnotationsReturnsOriginalBytes(t *testing.T) {
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original := []byte("not decoded when no annotations")
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out, err := ApplyAnnotations(original, nil, 1)
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if err != nil {
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t.Fatalf("apply annotations: %v", err)
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}
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if !bytes.Equal(out, original) {
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t.Fatalf("expected original bytes")
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}
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}
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func TestApplyAnnotationsDrawsTextIntoPNG(t *testing.T) {
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src := image.NewRGBA(image.Rect(0, 0, 120, 80))
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draw.Draw(src, src.Bounds(), &image.Uniform{C: color.White}, image.Point{}, draw.Src)
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var buf bytes.Buffer
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if err := png.Encode(&buf, src); err != nil {
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t.Fatalf("encode source: %v", err)
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}
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out, err := ApplyAnnotations(buf.Bytes(), []Annotation{
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{
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Tool: "text",
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Color: "#ef4444",
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Points: []Point{
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{X: 10, Y: 10},
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},
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Text: "T",
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},
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}, 1)
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if err != nil {
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t.Fatalf("apply annotations: %v", err)
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}
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img, err := png.Decode(bytes.NewReader(out))
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if err != nil {
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t.Fatalf("decode output: %v", err)
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}
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found := false
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for y := 8; y < 40 && !found; y++ {
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for x := 8; x < 40; x++ {
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got := color.RGBAModel.Convert(img.At(x, y)).(color.RGBA)
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if got.R > 180 && got.G < 180 && got.B < 180 {
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found = true
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break
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}
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}
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}
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if !found {
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t.Fatalf("expected red text pixels near annotation point")
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}
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}
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