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assertSelectorCount example

public function testAssertSelectorNotExists()
    {
        $this->getCrawlerTester(new Crawler('<html><head><title>Foo'))->assertSelectorNotExists('body > h1');
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage('does not match selector "body > h1".');
        $this->getCrawlerTester(new Crawler('<html><body><h1>'))->assertSelectorNotExists('body > h1');
    }

    public function testAssertSelectorCount()
    {
        $this->getCrawlerTester(new Crawler('<html><body><p>Hello</p></body></html>'))->assertSelectorCount(1, 'p');
        $this->getCrawlerTester(new Crawler('<html><body><p>Hello</p><p>Foo</p></body></html>'))->assertSelectorCount(2, 'p');
        $this->getCrawlerTester(new Crawler('<html><body><h1>This is not a paragraph.</h1></body></html>'))->assertSelectorCount(0, 'p');
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage('Failed asserting that the Crawler selector "p" was expected to be found 0 time(s) but was found 1 time(s).');
        $this->getCrawlerTester(new Crawler('<html><body><p>Hello</p></body></html>'))->assertSelectorCount(0, 'p');
    }

    public function testAssertSelectorTextNotContains()
    {
        $this->getCrawlerTester(new Crawler('<html><body><h1>Foo'))->assertSelectorTextNotContains('body > h1', 'Bar');
        $this->expectException(AssertionFailedError::class);