38 lines
947 B
Go
38 lines
947 B
Go
//go:build windows
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package tray
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import (
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"encoding/binary"
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"testing"
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)
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func TestDefaultIconIsMultiResolutionICO(t *testing.T) {
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icon := DefaultIcon()
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if IconFileExtension() != ".ico" || len(icon) < 6 {
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t.Fatalf("Windows tray icon is not ICO data")
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}
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if binary.LittleEndian.Uint16(icon[0:2]) != 0 || binary.LittleEndian.Uint16(icon[2:4]) != 1 {
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t.Fatal("Windows tray icon has an invalid ICO header")
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}
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count := int(binary.LittleEndian.Uint16(icon[4:6]))
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if count < 6 {
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t.Fatalf("ICO image count = %d, want at least 6", count)
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}
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want := map[int]bool{16: false, 20: false, 24: false, 32: false, 48: false, 256: false}
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for offset := 6; offset+16 <= len(icon) && offset < 6+count*16; offset += 16 {
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size := int(icon[offset])
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if size == 0 {
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size = 256
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}
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if _, ok := want[size]; ok {
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want[size] = true
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}
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}
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for size, found := range want {
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if !found {
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t.Errorf("ICO is missing %dx%d image", size, size)
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}
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}
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}
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