Added unit and integration tests

lib/api/html/accessibility.php

@@ -12,7 +12,7 @@
  *
  * @since 1.5.0
  *
- * @return void
+ * @return null|bool Returns false when no skip links, otherwise null.
  */
 function beans_build_skip_links() {
 	$skip_links = array();
@@ -47,10 +47,10 @@ function beans_build_skip_links() {
 	 *     @type string Anchor text.
 	 * }
 	 */
-	$skip_links = apply_filters( 'beans_skip_links_list', $skip_links );
+	$skip_links = (array) apply_filters( 'beans_skip_links_list', $skip_links );
 
 	if ( empty( $skip_links ) ) {
-		return;
+		return false;
 	}
 
 	beans_output_skip_links( $skip_links );

tests/phpunit/integration/api/html/beansBuildSkipLinks.php

@@ -265,4 +265,46 @@ function( $default_layout ) {
 
 		$this->assertContains( $this->format_the_html( $expected ), $this->format_the_html( $actual ) );
 	}
+
+	/**
+	 * Test beans_build_skip_links() should return false when no skip links because beans_skip_links_list filter unsets the array.
+	 */
+	public function test_should_return_false_when_filter_unsets_the_array_of_skip_links() {
+		add_filter(
+			'beans_default_layout',
+			function( $default_layout ) {
+				return 'c_sp';
+			}
+		);
+
+		$this->assertEquals( beans_get_layout(), 'c_sp' );
+
+		add_filter(
+			'beans_skip_links_list',
+			function( $skip_links ) {
+				unset( $skip_links['beans-content'], $skip_links['beans-primary-sidebar'] );
+				return $skip_links;
+			}
+		);
+
+		$this->assertFalse( beans_build_skip_links() );
+	}
+
+	/**
+	 * Test beans_build_skip_links() should return false when beans_skip_links_list filter returns null.
+	 */
+	public function test_should_return_false_when_filter_returns_null() {
+		add_filter(
+			'beans_default_layout',
+			function( $default_layout ) {
+				return 'c';
+			}
+		);
+
+		$this->assertEquals( beans_get_layout(), 'c' );
+
+		add_filter( 'beans_skip_links_list', '__return_null' );
+		$this->assertFalse( beans_build_skip_links() );
+	}
+
 }

tests/phpunit/unit/api/html/beansBuildSkipLinks.php

@@ -50,7 +50,7 @@ public function test_should_call_beans_has_primary_sidebar_and_beans_has_seconda
 	/**
 	 * Test beans_build_skip_links() should not call beans_has_primary_sidebar() or beans_has_secondary_sidebar() when the layout is full-width.
 	 */
-	public function test_should_not_call_beans_has_primary_sidebar_or_beans_has_secondary_sidebara_when_fullwith_layout() {
+	public function test_should_not_call_beans_has_primary_sidebar_or_beans_has_secondary_sidebar_when_fullwith_layout() {
 		Monkey\Functions\expect( 'beans_get_layout' )->once()->andReturn( 'c' );
 		Monkey\Functions\expect( 'has_nav_menu' )
 			->once()
@@ -66,4 +66,24 @@ public function test_should_not_call_beans_has_primary_sidebar_or_beans_has_seco
 		$this->assertNull( beans_build_skip_links() );
 	}
 
+	/**
+	 * Test beans_build_skip_links() should not call beans_output_skip_links() when there are no skip links.
+	 */
+	public function test_should_not_call_beans_output_skip_links_when_no_skip_links() {
+		Monkey\Functions\expect( 'beans_get_layout' )->once()->andReturn( 'c' );
+		Monkey\Functions\expect( 'has_nav_menu' )
+			->once()
+			->with( 'primary' )
+			->andReturn( false );
+		Monkey\Functions\expect( 'beans_has_primary_sidebar' )->never();
+		Monkey\Functions\expect( 'beans_has_secondary_sidebar' )->never();
+
+		Monkey\Filters\expectApplied( 'beans_skip_links_list' )
+			->once()
+			->andReturn( null );
+
+		Monkey\Functions\expect( 'beans_output_skip_links' )->never();
+
+		$this->assertFalse( beans_build_skip_links() );
+	}
 }