CSSStyleDeclaraction returns empty string

LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js

Index: LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js
diff --git a/LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js b/LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js
index beea4958ce8adf15ac3a446aea6bd96a361d48a7..d33371c3acb803d570a2f4730f9550db079061ab 100644
--- a/LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js
+++ b/LayoutTests/imported/csswg-test/css-shapes-1/shape-outside/values/support/parsing-utils.js
@@ -98,12 +98,12 @@ function buildTestCases(testCases, testType) {
     var results = [];
 
     // If test_type isn't specified, test inline style
-    var type = typeof testType == 'undefined' ? 'invalid': testType;
+    var type = typeof testType == 'undefined' ? 'empty_string': testType;
 
     testCases.forEach(function(test) {
         oneTestCase = [];
 
-        // name - annotated by type (inline vs. computed)
+        // name - annotated by type (empty_string vs. computed)
         if ( test.hasOwnProperty('name') ) {
             oneTestCase.push(test['name'] +' - '+ type);
         } else {
@@ -115,8 +115,8 @@ function buildTestCases(testCases, testType) {
         oneTestCase.push(test['actual'])
 
         // expected
-        if( type.indexOf('invalid') != -1 ){
-            oneTestCase.push(null)
+        if( type.indexOf('empty_string') != -1 ){
+            oneTestCase.push('')
         } else if( type == 'inline' ) {
             oneTestCase.push(test['expected_inline']);
         } else if( type == 'computed' ){
@@ -174,7 +174,7 @@ function buildPositionTests(shape, valid, type, units) {
                 testCase = new Array();
                 testCase.push(testValue + ' is invalid');
                 testCase.push(testValue);
-                testCase.push(null);
+                testCase.push("");
                 results.push(testCase);
             });
         }