HTML API: Use assertEqualHTML() in post filtering tests.

Prep work for #9248.

Author: dmsnell

tests/phpunit/tests/post/filtering.php

@@ -35,7 +35,7 @@ public function test_post_content_unknown_tag() {
 		$id   = self::factory()->post->create( array( 'post_content' => $content ) );
 		$post = get_post( $id );
 
-		$this->assertSame( $expected, $post->post_content );
+		$this->assertEqualHTML( $expected, $post->post_content );
 	}
 
 	// A simple test to make sure unbalanced tags are fixed.
@@ -52,7 +52,7 @@ public function test_post_content_unbalanced_tag() {
 		$id   = self::factory()->post->create( array( 'post_content' => $content ) );
 		$post = get_post( $id );
 
-		$this->assertSame( $expected, $post->post_content );
+		$this->assertEqualHTML( $expected, $post->post_content );
 	}
 
 	// Test KSES filtering of disallowed attribute.
@@ -69,7 +69,7 @@ public function test_post_content_disallowed_attr() {
 		$id   = self::factory()->post->create( array( 'post_content' => $content ) );
 		$post = get_post( $id );
 
-		$this->assertSame( $expected, $post->post_content );
+		$this->assertEqualHTML( $expected, $post->post_content );
 	}
 
 	/**
@@ -89,7 +89,7 @@ public function test_post_content_xhtml_empty_elem() {
 		$id   = self::factory()->post->create( array( 'post_content' => $content ) );
 		$post = get_post( $id );
 
-		$this->assertSame( $expected, $post->post_content );
+		$this->assertEqualHTML( $expected, $post->post_content );
 	}
 
 	// Make sure unbalanced tags are untouched when the balance option is off.
@@ -109,6 +109,6 @@ public function test_post_content_nobalance_nextpage_more() {
 		$id   = self::factory()->post->create( array( 'post_content' => $content ) );
 		$post = get_post( $id );
 
-		$this->assertSame( $content, $post->post_content );
+		$this->assertEqualHTML( $content, $post->post_content );
 	}
 }