Bug 979169 - A new testcase. r=aknow

dom/telephony/test/marionette/head.js

@@ -276,6 +276,18 @@ let emulator = (function() {
     });
   }
 
+  /**
+   * @return Promise
+   */
+  function changeModemTech(aTech, aPreferredMask) {
+    return Promise.resolve()
+      .then(() => emulator.runCmd("modem tech " + aTech + " " + aPreferredMask))
+      .then(() => emulator.runCmd("modem tech"))
+      .then(result => is(result[0],
+                         aTech + " " + aPreferredMask,
+                         "Check modem 'tech/preferred mask'"));
+  }
+
   /**
    * @return Promise
    */
@@ -1152,6 +1164,7 @@ let emulator = (function() {
   this.gWaitForNamedStateEvent = waitForNamedStateEvent;
   this.gWaitForStateChangeEvent = waitForStateChangeEvent;
   this.gCheckInitialState = checkInitialState;
+  this.gChangeModemTech = changeModemTech;
   this.gClearCalls = clearCalls;
   this.gOutCallStrPool = outCallStrPool;
   this.gInCallStrPool = inCallStrPool;

dom/telephony/test/marionette/test_modem_switch_tech.js

@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+MARIONETTE_HEAD_JS = "head.js";
+
+let settings = [
+  // "gsm/wcdma"
+  {tech: "gsm",   mask: "gsm/wcdma"},
+  {tech: "wcdma", mask: "gsm/wcdma"},
+
+  // "gsm"
+  {tech: "gsm",   mask: "gsm"},
+
+  // "wcdma"
+  {tech: "wcdma", mask: "wcdma"},
+
+  // "gsm/wcdma-auto"
+  {tech: "gsm",   mask: "gsm/wcdma-auto"},
+  {tech: "wcdma", mask: "gsm/wcdma-auto"},
+
+  // "cdma/evdo"
+  {tech: "cdma",  mask: "cdma/evdo"},
+  {tech: "evdo",  mask: "cdma/evdo"},
+
+  // "cdma"
+  {tech: "cdma",  mask: "cdma"},
+
+  // "evdo"
+  {tech: "evdo",  mask: "evdo"},
+
+  // "gsm/wcdma/cdma/evdo"
+  {tech: "gsm",   mask: "gsm/wcdma/cdma/evdo"},
+  {tech: "wcdma", mask: "gsm/wcdma/cdma/evdo"},
+  {tech: "cdma",  mask: "gsm/wcdma/cdma/evdo"},
+  {tech: "evdo",  mask: "gsm/wcdma/cdma/evdo"}
+];
+
+startTest(function() {
+
+  let promise = settings.reduce((aPromise, aSetting) => {
+    return aPromise.then(() => gChangeModemTech(aSetting.tech, aSetting.mask));
+  }, Promise.resolve());
+
+  return promise
+    // Exception Catching
+    .catch(error => ok(false, "Promise reject: " + error))
+
+    // Switch to the default modem tech
+    .then(() => gChangeModemTech("wcdma", "gsm/wcdma"))
+    .catch(error => ok(false, "Fetal Error: Promise reject: " + error))
+
+    .then(finish);
+});