Add yet more debug code

Author: westonruter

tests/phpunit/tests/template.php

@@ -1716,9 +1716,9 @@ static function () {
 			wp_should_load_separate_core_block_assets()
 		);
 		$this->ensure_style_asset_file_created( 'wp-block-library-theme', 'css/dist/block-library/theme.css', true );
-		$dependency = wp_styles()->query( 'wp-block-library' );
-		$this->assertTrue( (bool) $dependency, 'Expected wp-block-library stylesheet to be registered.' );
-		$this->assertIsString( $dependency->src, 'Expected wp-block-library to have a string src. Dependency: ' . json_encode( $dependency ) );
+		$block_library_dependency = wp_styles()->query( 'wp-block-library' );
+		$this->assertTrue( (bool) $block_library_dependency, 'Expected wp-block-library stylesheet to be registered.' );
+		$this->assertIsString( $block_library_dependency->src, 'Expected wp-block-library to have a string src. Dependency: ' . json_encode( $block_library_dependency ) );
 
 		if ( wp_should_load_separate_core_block_assets() ) {
 			$this->ensure_style_asset_file_created( 'wp-block-separator', 'blocks/separator/style.css', true );
@@ -1813,7 +1813,7 @@ static function () {
 		$this->assertSame(
 			$expected_styles,
 			$found_subset_styles,
-			'Expected the same styles. Snapshot: ' . self::get_array_snapshot_export( $found_subset_styles )
+			'Expected the same styles. Snapshot: ' . self::get_array_snapshot_export( $found_subset_styles ) . "\nAnd wp-block-library: " . json_encode( $block_library_dependency, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES ) . "\n And file contents: " . file_get_contents( $block_library_dependency->extra['path'] )
 		);
 	}