Add constructors for WebAudio nodes

third_party/WebKit/LayoutTests/webaudio/constructor/audionodeoptions.js

+// Test that constructor for the node with name |nodeName| handles the various
+// possible values for channelCount, channelCountMode, and
+// channelInterpretation.
+function testAudioNodeOptions(context, nodeName, nodeOptions) {
+    if (nodeOptions === undefined)
+        nodeOptions = {};
+    var node;
+    var success = true;
+
+    // Test that we can set channelCount and that errors are thrown for invalid values
+    var testCount = 17;
+    if (nodeOptions.expectedChannelCount) {
+        testCount = nodeOptions.expectedChannelCount.value;
+    }
+    success = Should("new " + nodeName + "(c, {channelCount: " + testCount + "}}",
+        function () {
+            node = new window[nodeName](
+                context,
+                Object.assign({},
+                    nodeOptions.additionalOptions, {
+                        channelCount: testCount
+                    }));
+        }).notThrow();
+    success = Should("node.channelCount", node.channelCount)
+        .beEqualTo(testCount) && success;
+
+    if (nodeOptions.expectedChannelCount && nodeOptions.expectedChannelCount.isFixed) {
+        // The channel count is fixed.  Verify that we throw an error if we try to
+        // change it. Arbitrarily set the count to be one more than the expected
+        // value.
+        testCount = nodeOptions.expectedChannelCount.value + 1;
+        success = Should("new " + nodeName + "(c, {channelCount: " + testCount + "}}",
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCount: testCount
+                        }));
+            }).throw(nodeOptions.expectedChannelCount.errorType || "TypeError") && success;
+    } else {
+        // The channel count is not fixed.  Try to set the count to invalid
+        // values and make sure an error is thrown.
+        var errorType = "NotSupportedError";
+
+        success = Should("new " + nodeName + "(c, {channelCount: 0}}",
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCount: 0
+                        }));
+            }).throw(errorType) && success;
+
+        success = Should("new " + nodeName + "(c, {channelCount: 99}}",
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCount: 99
+                        }));
+            }).throw(errorType) && success;
+    }
+
+    // Test channelCountMode
+    var testMode = "max";
+    if (nodeOptions && nodeOptions.expectedChannelCountMode) {
+        testMode = nodeOptions.expectedChannelCountMode.value;
+    }
+    success = Should("new " + nodeName + '(c, {channelCountMode: "' + testMode + '"}',
+        function () {
+            node = new window[nodeName](
+                context,
+                Object.assign({},
+                    nodeOptions.additionalOptions, {
+                        channelCountMode: testMode
+                    }));
+        }).notThrow() && success;
+    success = Should("node.channelCountMode", node.channelCountMode)
+        .beEqualTo(testMode) && success;
+
+    if (nodeOptions.expectedChannelCountMode && nodeOptions.expectedChannelCountMode.isFixed) {
+        // Channel count mode is fixed.  Test setting to something else throws.
+        var testModeMap = {
+            "max": "clamped-max",
+            "clamped-max": "explicit",
+            "explicit": "max"
+        };
+        testMode = testModeMap[nodeOptions.expectedChannelCountMode.value];
+        success = Should("new " + nodeName + '(c, {channelCountMode: "' + testMode + '"}',
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCountMode: testMode
+                        }));
+            }).throw(nodeOptions.expectedChannelCountMode.errorType) && success;
+    } else {
+        // Mode is not fixed. Verify that we can set the mode to all valid
+        // values, and that we throw for invalid values.
+
+        success = Should("new " + nodeName + '(c, {channelCountMode: "clamped-max"}',
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCountMode: "clamped-max"
+                        }));
+            }).notThrow() && success;
+        success = Should("node.channelCountMode", node.channelCountMode)
+            .beEqualTo("clamped-max") && success;
+
+        success = Should("new " + nodeName + '(c, {channelCountMode: "explicit"}',
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCountMode: "explicit"
+                        }));
+            }).notThrow() && success;
+        success = Should("node.channelCountMode", node.channelCountMode)
+            .beEqualTo("explicit") && success;
+
+        success = Should("new " + nodeName + '(c, {channelCountMode: "foobar"}',
+            function () {
+                node = new window[nodeName](
+                    context,
+                    Object.assign({},
+                        nodeOptions.additionalOptions, {
+                            channelCountMode: "foobar"
+                        }));
+            }).throw("TypeError") && success;
+        success = Should("node.channelCountMode", node.channelCountMode)
+            .beEqualTo("explicit") && success;
+    }
+
+    // Test channelInterpretation
+    success = Should("new " + nodeName + '(c, {channelInterpretation: "speakers"})',
+        function () {
+            node = new window[nodeName](
+                context,
+                Object.assign({},
+                    nodeOptions.additionalOptions, {
+                        channelInterpretation: "speakers"
+                    }));
+        }).notThrow() && success;
+    success = Should("node.channelInterpretation", node.channelInterpretation)
+        .beEqualTo("speakers") && success;
+
+    success = Should("new " + nodeName + '(c, {channelInterpretation: "discrete"})',
+        function () {
+            node = new window[nodeName](
+                context,
+                Object.assign({},
+                    nodeOptions.additionalOptions, {
+                        channelInterpretation: "discrete"
+                    }));
+        }).notThrow() && success;
+    success = Should("node.channelInterpretation", node.channelInterpretation)
+        .beEqualTo("discrete") && success;
+
+    success = Should("new " + nodeName + '(c, {channelInterpretation: "foobar"})',
+        function () {
+            node = new window[nodeName](
+                context,
+                Object.assign({},
+                    nodeOptions.additionalOptions, {
+                        channelInterpretation: "foobar"
+                    }));
+        }).throw("TypeError") && success;
+    success = Should("node.channelInterpretation", node.channelInterpretation)
+        .beEqualTo("discrete") && success;
+
+
+    Should("AudioNodeOptions for " + nodeName, success)
+        .summarize(
+            "were correctly handled",
+            "were not correctly handled");
+}