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gopngquant_test.go
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gopngquant_test.go
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package gopngquant
import (
"image/png"
"os"
"testing"
)
func Test_FileCompression(t *testing.T) {
options := Options{
Speed: 1,
MinQuality: 0,
TargetQuality: 25,
}
CompressFile("./images/example.png", "./images/output_gopngquant_file.png", options)
}
func Test_ImageCompression(t *testing.T) {
file, err := os.Open("./images/example.png")
if err != nil {
panic(err)
}
defer file.Close()
img, err := png.Decode(file)
if err != nil {
panic(err)
}
img, err = CompressImage(img, Options{
Speed: 1,
MinQuality: 0,
TargetQuality: 25,
})
if err != nil {
panic(err)
}
file, err = os.Create("./images/output_gopngquant_byte.png")
if err != nil {
panic(err)
}
defer file.Close()
encoder := png.Encoder{
CompressionLevel: png.BestCompression,
}
err = encoder.Encode(file, img)
if err != nil {
panic(err)
}
}
func Test_Validation_Speed_Below0(t *testing.T) {
options := Options{
Speed: -5,
MinQuality: 0,
TargetQuality: 100,
}
err := CompressFile("./images/example.png", "./images/should_fail.png", options)
if err == nil {
t.Fail()
}
}
func Test_Validation_MinQuality_Below0(t *testing.T) {
options := Options{
Speed: 1,
MinQuality: -1,
TargetQuality: 100,
}
err := CompressFile("./images/example.png", "./images/should_fail.png", options)
if err == nil {
t.Fail()
}
}
func Test_Validation_TargetQuality_BelowMinQuality(t *testing.T) {
options := Options{
Speed: 1,
MinQuality: 50,
TargetQuality: 25,
}
err := CompressFile("./images/example.png", "./images/should_fail.png", options)
if err == nil {
t.Fail()
}
}
func Test_Validation_TargetQuality_Above100(t *testing.T) {
options := Options{
Speed: 1,
MinQuality: 50,
TargetQuality: 101,
}
err := CompressFile("./images/example.png", "./images/should_fail.png", options)
if err == nil {
t.Fail()
}
}