Framework and tests for WorkerNavigatorBudget

third_party/WebKit/LayoutTests/http/tests/budget/resources/instrumentation-service-worker.js

+// Allows a document to exercise the Budget API within a service worker by sending commands.
+
+self.addEventListener('message', function(workerEvent) {
+  port = workerEvent.data;
+
+  // Listen to incoming commands on the message port.
+  port.onmessage = function(event) {
+    if (typeof event.data != 'object' || !event.data.command)
+      return;
+    var options = event.data.options || {}

[Peter Beverloo, 2016/08/24 15:28:23]

;

[harkness, 2016/08/24 16:22:50]

Done.

+    switch (event.data.command) {
+
+      case 'getCost':
+        navigator.budget.getCost('silent-push').then(function(cost) {
+          port.postMessage({ command: event.data.command,
+            success: true,
+            cost: cost });

[Peter Beverloo, 2016/08/24 15:28:23]

The alignment of this (and lines 23+, 31+, 39+ and 52+) is kind of odd. Normally
we align objects like:

port.postMessage({
    command: event.data.command,
    foo: 'bar'
});

or

port.postMessage({ command: event.data.command,
                   foo: 'bar' });

[harkness, 2016/08/24 16:22:50]

Done.

+        }).catch(makeErrorHandler(event.data.command));
+        break;
+
+      case 'getCostInvalidType':
+        navigator.budget.getCost('frobinator').then(function(cost) {
+          port.postMessage({ command: event.data.command,
+            success: true,
+            cost: cost });
+        }).catch(makeErrorHandler(event.data.command));
+        break;
+
+      case 'getBudget':
+        navigator.budget.getBudget().then(budget => {
+          port.postMessage({ command: event.data.command,
+            success: true,
+            budgetAt: budget[0].budgetAt,
+            time: budget[0].time });
+        }).catch(makeErrorHandler(event.data.command));
+        break;
+
+      default:
+        port.postMessage({ command: 'error',
+          errorMessage: 'Invalid command: ' + event.data.command });
+        break;
+    }
+  };
+
+  // Notify the controller that the worker is now available.
+  port.postMessage('ready');
+});
+
+function makeErrorHandler(command) {
+  return function(error) {
+    var errorMessage = error ? error.message : 'unknown error';
+    port.postMessage({ command: command,
+      success: false,
+      errorMessage: errorMessage });
+  };
+}