function BrowserWithJavascriptTest::testAssertJsCondition

File

core/tests/Drupal/FunctionalJavascriptTests/BrowserWithJavascriptTest.php, line 49

Class

BrowserWithJavascriptTest

Tests if we can execute JavaScript in the browser.

Namespace

Code

public function testAssertJsCondition() : void {
    $this->drupalGet('<front>');
    $session = $this->getSession();
    $session->resizeWindow(500, 300);
    $javascript = <<<JS
    (function(){
        var w = window,
        d = document,
        e = d.documentElement,
        g = d.getElementsByTagName('body')[0],
        x = w.innerWidth || e.clientWidth || g.clientWidth,
        y = w.innerHeight || e.clientHeight|| g.clientHeight;
        return x == 400 && y == 300;
    }())
JS;
    // We expected the following assertion to fail because the window has been
    // re-sized to have a width of 500 not 400.
    $this->expectException(AssertionFailedError::class);
    $this->assertJsCondition($javascript, 100);
}