Add unit tests with invalid calc definitions

Author: raxbg

tests/Sabberworm/CSS/ParserTest.php

@@ -415,6 +415,16 @@ function testCalcNestedInFile() {
 		$this->assertSame($sExpected, $oDoc->render());
 	}
 
+	function testInvalidCalcInFile() {
+		$oDoc = $this->parsedStructureForFile('calc-invalid', Settings::create()->withMultibyteSupport(true));
+		$sExpected = 'div {}
+div {}
+div {}
+div {}
+div {}';
+		$this->assertSame($sExpected, $oDoc->render());
+	}
+
 	function testGridLineNameInFile() {
 		$oDoc = $this->parsedStructureForFile('grid-linename', Settings::create()->withMultibyteSupport(true));
 		$sExpected = "div {grid-template-columns: [linename] 100px;}\nspan {grid-template-columns: [linename1 linename2] 100px;}";

tests/files/calc-invalid.css

@@ -0,0 +1,22 @@
+div{
+  height: calc (25% - 1em);
+}
+
+div{
+  height: calc
+  (25% - 1em);
+}
+
+div{
+  height: calc
+  width: 100px
+}
+
+div{
+  height: -moz-calc;
+}
+
+div{
+  height: calc
+  ;
+}