1 files changed, 24 insertions, 9 deletions
diff --git a/test/fixtures/wpt/WebCryptoAPI/import_export/symmetric_importKey.https.any.js b/test/fixtures/wpt/WebCryptoAPI/import_export/symmetric_importKey.https.any.js
index 404b66ac00..a9ce9be0a1 100644
--- a/test/fixtures/wpt/WebCryptoAPI/import_export/symmetric_importKey.https.any.js
+++ b/test/fixtures/wpt/WebCryptoAPI/import_export/symmetric_importKey.https.any.js
@@ -41,17 +41,18 @@
         }
 
         rawKeyData.forEach(function(keyData) {
-            // Generate all combinations of valid usages for testing
-            allValidUsages(vector.legalUsages, []).forEach(function(usages) {
-                // Try each legal value of the extractable parameter
-                vector.extractable.forEach(function(extractable) {
-                    vector.formats.forEach(function(format) {
-                        var data = keyData;
-                        if (format === "jwk") {
-                            data = jwkData(keyData, algorithm);
-                        }
+            // Try each legal value of the extractable parameter
+            vector.extractable.forEach(function(extractable) {
+                vector.formats.forEach(function(format) {
+                    var data = keyData;
+                    if (format === "jwk") {
+                        data = jwkData(keyData, algorithm);
+                    }
+                    // Generate all combinations of valid usages for testing
+                    allValidUsages(vector.legalUsages, []).forEach(function(usages) {
                         testFormat(format, algorithm, data, keyData.length * 8, usages, extractable);
                     });
+                    testEmptyUsages(format, algorithm, data, keyData.length * 8, extractable);
                 });
             });
 
@@ -90,6 +91,20 @@
         }, "Good parameters: " + keySize.toString() + " bits " + parameterString(format, keyData, algorithm, extractable, usages));
     }
 
+    // Test importKey with a given key format and other parameters but with empty usages.
+    // Should fail with SyntaxError
+    function testEmptyUsages(format, algorithm, keyData, keySize, extractable) {
+        const usages = [];
+        promise_test(function(test) {
+            return subtle.importKey(format, keyData, algorithm, extractable, usages).
+            then(function(key) {
+                assert_unreached("importKey succeeded but should have failed with SyntaxError");
+            }, function(err) {
+                assert_equals(err.name, "SyntaxError", "Should throw correct error, not " + err.name + ": " + err.message);
+            });
+        }, "Empty Usages: " + keySize.toString() + " bits " + parameterString(format, keyData, algorithm, extractable, usages));
+    }
+
 
 
     // Helper methods follow: