Add a test for mime handler view iframes and make them work on Windows.

chrome/test/data/extensions/api_test/mime_handler_view/embedded.js

Index: chrome/test/data/extensions/api_test/mime_handler_view/embedded.js
diff --git a/chrome/test/data/extensions/api_test/mime_handler_view/embedded.js b/chrome/test/data/extensions/api_test/mime_handler_view/embedded.js
index be6582391b15164c16d1a7d1ff66183a84c1d329..c6d887e92bcb3a219f1bfea25a92968faf9f6248 100644
--- a/chrome/test/data/extensions/api_test/mime_handler_view/embedded.js
+++ b/chrome/test/data/extensions/api_test/mime_handler_view/embedded.js
@@ -4,10 +4,13 @@
 
 'use strict';
 
-window.addEventListener('message', function(event) {
-  // Echo the data back to the source window.
-  event.source.postMessage(event.data, '*');
-}, false);
+var queuedMessages = [];

[raymes, 2015/01/28 00:54:58]

nit: Please add a comment about why messages are queued

[Sam McNally, 2015/01/28 01:54:43]

Done.

+
+function queueMessage(event) {
+  queuedMessages.push(event);
+}
+
+window.addEventListener('message', queueMessage, false);
 
 var streamDetails;
 
@@ -27,35 +30,51 @@ function fetchUrl(url) {
   });
 }
 
+function expectSuccessfulRead(response) {
+  chrome.test.assertEq(200, response.status);
+  chrome.test.assertEq('content to read\n', response.data);
+}
+
 var tests = [
   function testBasic() {
-    chrome.test.assertEq(
-        'chrome-extension://oickdpebdnfbgkcaoklfcdhjniefkcji/testBasic.csv',
-        streamDetails.originalUrl);
+    chrome.test.assertTrue(
+        streamDetails.originalUrl.indexOf('testBasic.csv') != -1);
     chrome.test.assertEq('text/csv', streamDetails.mimeType);
     chrome.test.assertTrue(streamDetails.tabId != -1);
     chrome.test.assertFalse(streamDetails.embedded);

[raymes, 2015/01/28 00:54:59]

Can we also do a basic check on the headers now then?

[Sam McNally, 2015/01/28 01:54:43]

Done.

 
-    fetchUrl(streamDetails.streamUrl).then(function(response) {
-      chrome.test.assertEq(200, response.status);
-      chrome.test.assertEq('content to read\n', response.data);
-      chrome.test.succeed();
-    });
+    fetchUrl(streamDetails.streamUrl)
+        .then(expectSuccessfulRead)
+        .then(chrome.test.succeed);
   },
 
   function testEmbedded() {
-    chrome.test.assertEq(
-        'chrome-extension://oickdpebdnfbgkcaoklfcdhjniefkcji/testEmbedded.csv',
-        streamDetails.originalUrl);
+    chrome.test.assertTrue(
+        streamDetails.originalUrl.indexOf('testEmbedded.csv') != -1);
     chrome.test.assertEq('text/csv', streamDetails.mimeType);
     chrome.test.assertTrue(streamDetails.tabId != -1);
     chrome.test.assertTrue(streamDetails.embedded);
 
-    fetchUrl(streamDetails.streamUrl).then(function(response) {
-      chrome.test.assertEq(200, response.status);
-      chrome.test.assertEq('content to read\n', response.data);
-      chrome.test.succeed();
+    fetchUrl(streamDetails.streamUrl)
+        .then(expectSuccessfulRead)
+        .then(chrome.test.succeed);
+  },
+
+  function testIframe() {
+    chrome.test.assertTrue(
+        streamDetails.originalUrl.indexOf('testIframe.csv') != -1);
+    chrome.test.assertEq('text/csv', streamDetails.mimeType);
+    chrome.test.assertTrue(streamDetails.tabId != -1);
+    chrome.test.assertTrue(streamDetails.embedded);
+    var printMessageArrived = new Promise(function(resolve, reject) {
+      window.addEventListener('message', function(event) {
+        chrome.test.assertEq('print', event.data.type);
+        resolve();
+      }, false);
     });
+    var contentRead = fetchUrl(streamDetails.streamUrl)
+        .then(expectSuccessfulRead);
+    Promise.all([printMessageArrived, contentRead]).then(chrome.test.succeed);
   },
 
   function testAbort() {
@@ -67,6 +86,29 @@ var tests = [
       });
     });
   },
+
+  function testPostMessage() {
+    var expectedMessages = ['hey', 100, 25.0];
+    var messagesReceived = 0;
+    function handleMessage(event) {
+      if (event.data == 'succeed' &&
+          messagesReceived == expectedMessages.length) {
+        chrome.test.succeed();
+      } else if (event.data == 'fail') {
+        chrome.test.fail();
+      } else if (event.data == expectedMessages[messagesReceived]) {
+        event.source.postMessage(event.data, '*');
+        messagesReceived++;
+      } else {
+        chrome.test.fail('unexpected message ' + event.data);
+      }
+    }
+    window.addEventListener('message', handleMessage, false);
+    while (queuedMessages.length) {
+      handleMessage(queuedMessages.unshift());
+    }
+
+  }
 ];
 
 var testsByName = {};
@@ -83,6 +125,8 @@ chrome.mimeHandlerPrivate.getStreamInfo(function(streamInfo) {
   var urlComponents = streamInfo.originalUrl.split('/');
   var test = urlComponents[urlComponents.length - 1].split('.')[0];
   streamDetails = streamInfo;
-  if (testsByName[test])
+  if (testsByName[test]) {
+    window.removeEventListener('message', queueMessage);
     chrome.test.runTests([testsByName[test]]);
+  }
 });