Tests: Cover has_term()

tests/phpunit/tests/category/hasTerm.php

@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Tests for has_term().
+ *
+ * @group taxonomy
+ *
+ * @covers ::has_term
+ */
+class Tests_Category_HasTerm extends WP_UnitTestCase {
+
+	const TAXONOMY = 'wptests_tax';
+
+	/**
+	 * Term object assigned to post.
+	 *
+	 * @var WP_Term
+	 */
+	private $term;
+
+	/**
+	 * Post object assigned to $term.
+	 *
+	 * @var WP_Post
+	 */
+	private $post;
+
+	/**
+	 * Sets up test fixtures before each test method.
+	 */
+	public function set_up() {
+		parent::set_up();
+
+		register_taxonomy( self::TAXONOMY, 'post' );
+
+		$this->term = self::factory()->term->create_and_get(
+			array(
+				'taxonomy' => self::TAXONOMY,
+				'name'     => 'Assigned Term',
+				'slug'     => 'assigned-term',
+			)
+		);
+
+		$this->post = self::factory()->post->create_and_get();
+		wp_set_object_terms( $this->post->ID, $this->term->term_id, self::TAXONOMY );
+	}
+
+	/**
+	 * Tests that has_term() defaults to the global post when no post parameter is passed.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_has_term_falls_back_to_global_post() {
+		$GLOBALS['post'] = $this->post;
+
+		$this->assertTrue( has_term( $this->term->term_id, self::TAXONOMY ) );
+	}
+
+	/**
+	 * Tests that has_term() returns false when the post does not exist or no post is in scope.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_has_term_returns_false_for_missing_post() {
+		$this->assertFalse( has_term( $this->term->term_id, self::TAXONOMY, 99999999 ) );
+		$this->assertFalse( has_term( $this->term->term_id, self::TAXONOMY ) );
+	}
+
+	/**
+	 * Tests that has_term() returns false when an invalid or non-existent taxonomy is passed.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_has_term_returns_false_for_invalid_taxonomy() {
+		$this->assertFalse( has_term( $this->term->term_id, 'non_existent_tax', $this->post->ID ) );
+	}
+}