"add_attachment" callback refactored.

connectors/class-connector-media.php

@@ -151,7 +151,7 @@ public function callback_add_attachment( $post_id ) {
 		$url             = $post->guid;
 		$parent_id       = $post->post_parent;
 		$parent          = get_post( $parent_id );
-		$parent_title    = $parent_id ? $parent->post_title : null;
+		$parent_title    = $parent instanceof \WP_Post ? $parent->post_title : 'Unidentifiable post';
 		$attachment_type = $this->get_attachment_type( $post->guid );
 
 		$this->log(

tests/tests/connectors/test-class-connector-media.php

@@ -32,7 +32,7 @@ public function test_callback_add_attachment() {
 		$post_id = self::factory()->post->create( array( 'post_title' => 'Test post' ) );
 
 		// Expected log calls.
-		$this->mock->expects( $this->exactly( 2 ) )
+		$this->mock->expects( $this->exactly( 3 ) )
 			->method( 'log' )
 			->withConsecutive(
 				array(
@@ -72,6 +72,28 @@ function( $subject ) use ( $post_id ) {
 					$this->greaterThan( 0 ),
 					$this->equalTo( 'document' ),
 					$this->equalTo( 'attached' ),
+				),
+				array(
+					$this->equalTo(
+						_x(
+							'Attached "%1$s" to "%2$s"',
+							'1: Attachment title, 2: Parent post title',
+							'stream'
+						)
+					),
+					$this->callback(
+						function( $subject ) {
+							$expected = array(
+								'name'         => 'Document one',
+								'parent_title' => 'Unidentifiable post',
+								'parent_id'    => 42,
+							);
+							return $expected === array_intersect_key( $expected, $subject );
+						}
+					),
+					$this->greaterThan( 0 ),
+					$this->equalTo( 'document' ),
+					$this->equalTo( 'attached' ),
 				)
 			);
 
@@ -92,6 +114,16 @@ function( $subject ) use ( $post_id ) {
 			)
 		);
 
+		// Create attachment with invalid post parent.
+		self::factory()->post->create(
+			array(
+				'post_title'   => 'Document one',
+				'post_type'    => 'attachment',
+				'post_content' => 'some description',
+				'post_parent'  => 42
+			)
+		);
+
 		// Check callback test action.
 		$this->assertFalse( 0 === did_action( 'wp_stream_test_callback_add_attachment' ) );
 	}