Import the tests from PR MyIntervals#174

Author: raxbg

tests/Sabberworm/CSS/ParserTest.php

@@ -802,4 +802,14 @@ function testLonelyImport() {
 		$sExpected = "@import url(\"example.css\") only screen and (max-width: 600px);";
 		$this->assertSame($sExpected, $oDoc->render());
 	}
+
+	function testEscapedSpecialCaseTokens() {
+		$oDoc = $this->parsedStructureForFile('escaped-tokens');
+		$contents = $oDoc->getContents();
+		$rules = $contents[0]->getRules();
+		$urlRule = $rules[0];
+		$calcRule = $rules[1];
+		$this->assertEquals(true, is_a($urlRule->getValue(), '\Sabberworm\CSS\Value\URL'));
+		$this->assertEquals(true, is_a($calcRule->getValue(), '\Sabberworm\CSS\Value\CalcFunction'));
+	}
 }

tests/files/escaped-tokens.css

@@ -0,0 +1,7 @@
+/**
+ * Special case function-like tokens, with an escape backslash followed by a non-newline and non-hex digit character, should be parsed as the appropriate \Sabberworm\CSS\Value\ type
+ */
+body {
+	background: u\rl("//example.org/picture.jpg");
+	height: ca\lc(100% - 1px);
+}