diff -r 000000000000 -r 6474c204b198 dom/apps/tests/asmjs/asmjs_app.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/apps/tests/asmjs/asmjs_app.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,143 @@
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/NetUtil.jsm");
+
+function handleRequest(aRequest, aResponse) {
+  aResponse.setHeader("Access-Control-Allow-Origin", "*", false);
+
+  var query = getQuery(aRequest);
+
+  if ("setVersion" in query) {
+    setState("version", query.setVersion);
+    aResponse.write("OK");
+    return;
+  }
+  var version = Number(getState("version"));
+
+  // setPrecompile sets the "precompile" field in the app manifest
+  if ("setPrecompile" in query) {
+    setState("precompile", query.setPrecompile);
+    aResponse.write("OK");
+    return;
+  }
+  var precompile = getState("precompile");
+
+  if ("getPackage" in query) {
+    aResponse.setHeader("Content-Type", "application/zip", false);
+    aResponse.write(buildAppPackage(version, precompile));
+    return;
+  }
+
+  if ("getManifest" in query) {
+    aResponse.setHeader("Content-Type", "application/x-web-app-manifest+json", false);
+    aResponse.write(getManifest(version, precompile));
+    return;
+  }
+}
+
+function getQuery(aRequest) {
+  var query = {};
+  aRequest.queryString.split('&').forEach(function(val) {
+    var [name, value] = val.split('=');
+    query[decodeURIComponent(name)] = decodeURIComponent(value);
+  });
+  return query;
+}
+
+function getTestFile(aName) {
+  var file = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
+
+  var path = "chrome/dom/apps/tests/asmjs/" + aName;
+
+  path.split("/").forEach(function(component) {
+    file.append(component);
+  });
+
+  return file;
+}
+
+function readFile(aFile) {
+  var fstream = Cc["@mozilla.org/network/file-input-stream;1"].
+                createInstance(Ci.nsIFileInputStream);
+  fstream.init(aFile, -1, 0, 0);
+  var data = NetUtil.readInputStreamToString(fstream, fstream.available());
+  fstream.close();
+  return data;
+}
+
+function getManifest(aVersion, aPrecompile) {
+  return readFile(getTestFile("manifest.webapp")).
+           replace(/VERSIONTOKEN/g, aVersion).
+           replace(/PRECOMPILETOKEN/g, aPrecompile);
+}
+
+function buildAppPackage(aVersion, aPrecompile) {
+  const PR_RDWR        = 0x04;
+  const PR_CREATE_FILE = 0x08;
+  const PR_TRUNCATE    = 0x20;
+
+  let zipFile = Services.dirsvc.get("TmpD", Ci.nsIFile);
+  zipFile.append("application.zip");
+
+  let zipWriter = Cc["@mozilla.org/zipwriter;1"].createInstance(Ci.nsIZipWriter);
+  zipWriter.open(zipFile, PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE);
+
+  // Add index.html file to the zip file
+  zipWriter.addEntryFile("index.html",
+                         Ci.nsIZipWriter.COMPRESSION_NONE,
+                         getTestFile("index.html"),
+                         false);
+
+  // Add manifest to the zip file
+  var manStream = Cc["@mozilla.org/io/string-input-stream;1"].
+                  createInstance(Ci.nsIStringInputStream);
+  var manifest = getManifest(aVersion, aPrecompile);
+  manStream.setData(manifest, manifest.length);
+  zipWriter.addEntryStream("manifest.webapp", Date.now(),
+                           Ci.nsIZipWriter.COMPRESSION_NONE,
+                           manStream, false);
+
+  // Add an asm.js module to the zip file
+  // The module also contains some code to perform tests
+
+  // Creates a module big enough to be cached
+  // The module is different according to the app version, this way
+  // we can test that on update the new module is compiled
+  var code = "function f() { 'use asm';\n";
+  for (var i = 0; i < 5000; i++) {
+    code += "function g" + i + "() { return " + i + "}\n";
+  }
+  code += "return g" + aVersion + " }\n\
+var jsFuns = SpecialPowers.Cu.getJSTestingFunctions();\n\
+ok(jsFuns.isAsmJSCompilationAvailable(), 'asm.js compilation is available');\n\
+ok(jsFuns.isAsmJSModule(f), 'f is an asm.js module');\n\
+var g" + aVersion + " = f();\n\
+ok(jsFuns.isAsmJSFunction(g" + aVersion + "), 'g" + aVersion + " is an asm.js function');\n\
+ok(g" + aVersion + "() === " + aVersion + ", 'g" + aVersion + " returns the correct result');";
+
+  // If the "precompile" field contains this module, we test that it is loaded
+  // from the cache.
+  // If the "precompile" field doesn't contain the module or is incorrect, we
+  // test that the module is not loaded from the cache.
+  if (aPrecompile == '["asmjsmodule.js"]') {
+    code += "ok(jsFuns.isAsmJSModuleLoadedFromCache(f), 'module loaded from cache');\n";
+  } else {
+    code += "ok(!jsFuns.isAsmJSModuleLoadedFromCache(f), 'module not loaded from cache');\n";
+  }
+
+  code += "alert('DONE');";
+
+  var jsStream = Cc["@mozilla.org/io/string-input-stream;1"].
+                 createInstance(Ci.nsIStringInputStream);
+  jsStream.setData(code, code.length);
+  zipWriter.addEntryStream("asmjsmodule.js", Date.now(),
+                           Ci.nsIZipWriter.COMPRESSION_NONE,
+                           jsStream, false);
+
+  zipWriter.close();
+
+  return readFile(zipFile);
+}