Add race conditions tests. Fix races.

locale_test.go

@@ -69,3 +69,69 @@ msgstr[2] "And this is the second plural form: %s"
 		t.Errorf("Expected 'And this is the second plural form: Variable' but got '%s'", tr)
 	}
 }
+
+func TestLocaleRace(t *testing.T) {
+	// Set PO content
+	str := `# Some comment
+msgid "My text"
+msgstr "Translated text"
+
+# More comments
+msgid "Another string"
+msgstr ""
+
+msgid "One with var: %s"
+msgid_plural "Several with vars: %s"
+msgstr[0] "This one is the singular: %s"
+msgstr[1] "This one is the plural: %s"
+msgstr[2] "And this is the second plural form: %s"
+
+    `
+
+	// Create Locales directory with simplified language code
+	dirname := path.Clean("/tmp" + string(os.PathSeparator) + "es")
+	err := os.MkdirAll(dirname, os.ModePerm)
+	if err != nil {
+		t.Fatalf("Can't create test directory: %s", err.Error())
+	}
+
+	// Write PO content to file
+	filename := path.Clean(dirname + string(os.PathSeparator) + "race.po")
+
+	f, err := os.Create(filename)
+	if err != nil {
+		t.Fatalf("Can't create test file: %s", err.Error())
+	}
+	defer f.Close()
+
+	_, err = f.WriteString(str)
+	if err != nil {
+		t.Fatalf("Can't write to test file: %s", err.Error())
+	}
+
+	// Create Locale with full language code
+	l := NewLocale("/tmp", "es")
+
+	// Init sync channels
+	ac := make(chan bool)
+	rc := make(chan bool)
+
+	// Add domain in goroutine
+	go func(l *Locale, done chan bool) {
+		l.AddDomain("race")
+		done <- true
+	}(l, ac)
+
+	// Get translations in goroutine
+	go func(l *Locale, done chan bool) {
+		println(l.GetD("race", "My text"))
+		done <- true
+	}(l, rc)
+
+	// Get translations at top level
+	println(l.GetD("race", "My text"))
+
+	// Wait for goroutines to finish
+	<-ac
+	<-rc
+}