Add tests for arithmetic in functions

Author: raxbg

tests/ParserTest.php

@@ -1225,6 +1225,19 @@ public function lonelyImport()
         self::assertSame($sExpected, $oDoc->render());
     }
 
+    /**
+     * @test
+     */
+    public function functionArithmeticInFile()
+    {
+        $oDoc = self::parsedStructureForFile('function-arithmetic', Settings::create()->withMultibyteSupport(true));
+        $sExpected = 'div {height: max(300,vh+10);}
+div {height: max(300,vh-10);}
+div {height: max(300,vh*10);}
+div {height: max(300,vh/10);}';
+        self::assertSame($sExpected, $oDoc->render());
+    }
+
     public function escapedSpecialCaseTokens()
     {
         $oDoc = $this->parsedStructureForFile('escaped-tokens');

tests/fixtures/function-arithmetic.css

@@ -0,0 +1,12 @@
+div {
+    height: max(300, vh + 10);
+}
+div {
+    height: max(300, vh - 10);
+}
+div {
+    height: max(300, vh * 10);
+}
+div {
+    height: max(300, vh / 10);
+}