61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package main
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import (
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"net/http"
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"net/http/httptest"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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func TestIconFromDir(t *testing.T) {
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dir := t.TempDir()
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png := []byte{0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0, 1, 2, 3}
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if e := os.WriteFile(filepath.Join(dir, "favicon.png"), png, 0644); e != nil {
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t.Fatal(e)
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}
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u := iconFromDir(dir)
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if !strings.HasPrefix(u, "data:image/png;base64,") {
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t.Fatalf("got %q", u)
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}
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}
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func TestIconFromPortFavicon(t *testing.T) {
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ico := []byte{0, 0, 1, 0, 1, 0, 16, 16, 0, 0, 1, 0, 32, 0}
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srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path == "/favicon.ico" {
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w.Header().Set("Content-Type", "image/x-icon")
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_, _ = w.Write(ico)
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return
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}
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http.NotFound(w, r)
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}))
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defer srv.Close()
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// iconFromPort 用 127.0.0.1:port，从 httptest URL 解析端口
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u := srv.URL
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port := 0
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if i := strings.LastIndex(u, ":"); i >= 0 {
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_, _ = fmtSscanf(u[i+1:], &port)
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}
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if port == 0 {
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t.Fatal("no port")
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}
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got := iconFromPort(port)
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if !strings.HasPrefix(got, "data:image/") {
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t.Fatalf("got %q", got)
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}
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}
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func fmtSscanf(s string, port *int) (int, error) {
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n := 0
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for _, c := range s {
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if c < '0' || c > '9' {
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break
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}
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n = n*10 + int(c-'0')
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}
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*port = n
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return 1, nil
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}
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