Add race conditions tests. Fix races.

gotext_test.go

@@ -63,3 +63,60 @@ 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 TestPackageRace(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 on default location
+	dirname := path.Clean(library + string(os.PathSeparator) + "en_US")
+	err := os.MkdirAll(dirname, os.ModePerm)
+	if err != nil {
+		t.Fatalf("Can't create test directory: %s", err.Error())
+	}
+
+	// Write PO content to default domain file
+	filename := path.Clean(dirname + string(os.PathSeparator) + domain + ".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())
+	}
+
+	// Init sync channels
+	c1 := make(chan bool)
+	c2 := make(chan bool)
+
+	// Test translations
+	go func(done chan bool) {
+		println(Get("My text"))
+		done <- true
+	}(c1)
+
+	go func(done chan bool) {
+		println(Get("My text"))
+		done <- true
+	}(c2)
+
+	println(Get("My text"))
+}