add tests

tests/translate-link-test.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Translation helper tests.
+ *
+ * @package ThemeIsleSDK
+ */
+
+/**
+ * Test translation link functionality.
+ */
+class Translate_Link extends WP_UnitTestCase {
+
+	public function test_default_path() {
+		add_filter( 'locale', function () {
+			return 'de_DE';
+		} );
+		$url = 'https://example.com';
+		$this->assertEquals( $url . '/de', tsdk_translate_link( $url ) );
+		$url = 'https://example.com/some/path';
+		$this->assertEquals( $url . '/de', tsdk_translate_link( $url ) );
+		$url = 'https://example.com/some/path/';
+		$this->assertEquals( $url . 'de/', tsdk_translate_link( $url ) );
+	}
+
+	public function test_query() {
+		add_filter( 'locale', function () {
+			return 'de_DE';
+		} );
+		$url = 'https://example.com';
+		$this->assertEquals( 'https://example.com/?lang=de', tsdk_translate_link( $url, 'query' ) );
+	}
+
+	public function test_domain() {
+		add_filter( 'locale', function () {
+			return 'de_DE';
+		} );
+		$url = 'https://example.com';
+		$this->assertEquals( 'https://optimole.de', tsdk_translate_link( $url, 'domain', [ 'de_DE' => 'optimole.de' ] ) );
+	}
+
+	public function test_non_existent() {
+		add_filter( 'locale', function () {
+			return 'da_DK';
+		} );
+		$url = 'https://example.com';
+		$this->assertEquals( 'https://example.com', tsdk_translate_link( $url ) );
+	}
+
+}