function FilterKernelTest::testLineBreakFilter

Tests the line break filter.

File

core/modules/filter/tests/src/Kernel/FilterKernelTest.php, line 319

Class

FilterKernelTest

Tests Filter module filters individually.

Namespace

Code

public function testLineBreakFilter() {
    // Get FilterAutoP object.
    $filter = $this->filters['filter_autop'];
    // Since the line break filter naturally needs plenty of newlines in test
    // strings and expectations, we're using "\n" instead of regular newlines
    // here.
    $tests = [
        // Single line breaks should be changed to <br /> tags, while paragraphs
        // separated with double line breaks should be enclosed with <p></p> tags.
"aaa\nbbb\n\nccc" => [
            "<p>aaa<br />\nbbb</p>\n<p>ccc</p>" => TRUE,
        ],
        // Skip contents of certain block tags entirely.
"<script>aaa\nbbb\n\nccc</script>\n<style>aaa\nbbb\n\nccc</style>\n<pre>aaa\nbbb\n\nccc</pre>\n<object>aaa\nbbb\n\nccc</object>\n<iframe>aaa\nbbb\n\nccc</iframe>\n" => [
            "<script>aaa\nbbb\n\nccc</script>" => TRUE,
            "<style>aaa\nbbb\n\nccc</style>" => TRUE,
            "<pre>aaa\nbbb\n\nccc</pre>" => TRUE,
            "<object>aaa\nbbb\n\nccc</object>" => TRUE,
            "<iframe>aaa\nbbb\n\nccc</iframe>" => TRUE,
        ],
        // Skip comments entirely.
"One. <!-- comment --> Two.\n<!--\nThree.\n-->\n" => [
            '<!-- comment -->' => TRUE,
            "<!--\nThree.\n-->" => TRUE,
        ],
        // Resulting HTML should produce matching paragraph tags.
'<p><div>  </div></p>' => [
            "<p>\n<div>  </div>\n</p>" => TRUE,
        ],
        '<div><p>  </p></div>' => [
            "<div>\n</div>" => TRUE,
        ],
        '<blockquote><pre>aaa</pre></blockquote>' => [
            "<blockquote><pre>aaa</pre></blockquote>" => TRUE,
        ],
        "<pre>aaa\nbbb\nccc</pre>\nddd\neee" => [
            "<pre>aaa\nbbb\nccc</pre>" => TRUE,
            "<p>ddd<br />\neee</p>" => TRUE,
        ],
        // Comments remain unchanged and subsequent lines/paragraphs are
        // transformed normally.
"aaa<!--comment-->\n\nbbb\n\nccc\n\nddd<!--comment\nwith linebreak-->\n\neee\n\nfff" => [
            "<p>aaa</p>\n<!--comment--><p>\nbbb</p>\n<p>ccc</p>\n<p>ddd</p>" => TRUE,
            "<!--comment\nwith linebreak--><p>\neee</p>\n<p>fff</p>" => TRUE,
        ],
        // Check that a comment in a PRE will result that the text after
        // the comment, but still in PRE, is not transformed.
"<pre>aaa\nbbb<!-- comment -->\n\nccc</pre>\nddd" => [
            "<pre>aaa\nbbb<!-- comment -->\n\nccc</pre>" => TRUE,
        ],
        // Bug 810824, paragraphs were appearing around iframe tags.
"<iframe>aaa</iframe>\n\n" => [
            "<p><iframe>aaa</iframe></p>" => FALSE,
        ],
        // Bug 3097338, paragraphs were appearing around drupalmedia tags.
'<drupal-media data-caption=" " data-entity-type="media" data-entity-uuid="dbb16f97-cd11-4357-acde-cd09e19e312b"></drupal-media>' => [
            '<p><drupal-media data-caption=" " data-entity-type="media" data-entity-uuid="dbb16f97-cd11-4357-acde-cd09e19e312b"></drupal-media></p>' => FALSE,
        ],
    ];
    $this->assertFilteredString($filter, $tests);
    // Very long string hitting PCRE limits.
    $limit = max(ini_get('pcre.backtrack_limit'), ini_get('pcre.recursion_limit'));
    $source = $this->randomMachineName($limit);
    $result = _filter_autop($source);
    $success = $this->assertEqual($result, '<p>' . $source . "</p>\n", 'Line break filter can process very long strings.');
    if (!$success) {
        $this->verbose("\n" . $source . "\n<hr />\n" . $result);
    }
}