update

internal/handler/templates_format_test.go

@@ -0,0 +1,25 @@
+package handler
+
+import "testing"
+
+// TestFormatBytes 校验后台「图集原图总大小」的字节格式化（0/负数为「—」）。
+func TestFormatBytes(t *testing.T) {
+	cases := []struct {
+		n    int64
+		want string
+	}{
+		{0, "—"},
+		{-1, "—"},
+		{500, "500 B"},
+		{1024, "1.0 KB"},
+		{1536, "1.5 KB"},
+		{1024 * 1024, "1.0 MB"},
+		{int64(1.5 * 1024 * 1024), "1.5 MB"},
+		{int64(1.5 * 1024 * 1024 * 1024), "1.5 GB"},
+	}
+	for _, c := range cases {
+		if got := formatBytes(c.n); got != c.want {
+			t.Errorf("formatBytes(%d) = %q, want %q", c.n, got, c.want)
+		}
+	}
+}