52     function parameterString(algorithm, extractable, usages) {  argument
59                         objectToString(extractable) + ", " +
71     function testError(algorithm, extractable, usages, expectedError, testTag) {  argument
73             return crypto.subtle.generateKey(algorithm, extractable, usages)
83         }, testTag + ": generateKey" + parameterString(algorithm, extractable, usages));
163             [false, true, "RED", 7].forEach(function(extractable){  argument
164                 testError(algorithm, extractable, usages, "NotSupportedError", "Bad algorithm");
178                 [true].forEach(function(extractable) {  argument
179                     testError(algorithm, extractable, usages, "SyntaxError", "Bad usages");
195                 [false, true].forEach(function(extractable) {  argument
197 …          testError(algorithm, extractable, usages, "NotSupportedError", "Bad algorithm property");
199 …             testError(algorithm, extractable, usages, "OperationError", "Bad algorithm property");
213             [false, true].forEach(function(extractable) {  argument
214                 testError(algorithm, extractable, usages, "SyntaxError", "Empty usages");