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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=978918
+-->
+<head>
+  <title>Basic test for InputMethod API.</title>
+  <script type="application/javascript;version=1.7" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript;version=1.7" src="inputmethod_common.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=978918">Mozilla Bug 978918</a>
+<p id="display"></p>
+<pre id="test">
+<script class="testbody" type="application/javascript;version=1.7">
+
+// The input context.
+var gContext = null;
+
+inputmethod_setup(function() {
+  runTest();
+});
+
+function runTest() {
+  let im = navigator.mozInputMethod;
+
+  im.oninputcontextchange = function() {
+    ok(true, 'inputcontextchange event was fired.');
+    im.oninputcontextchange = null;
+
+    gContext = im.inputcontext;
+    if (!gContext) {
+      ok(false, 'Should have a non-null inputcontext.');
+      inputmethod_cleanup();
+      return;
+    }
+
+    test_setSelectionRange();
+  };
+
+  // Set current page as an input method.
+  SpecialPowers.wrap(im).setActive(true);
+
+  let iframe = document.createElement('iframe');
+  iframe.src = 'file_test_sms_app.html';
+  iframe.setAttribute('mozbrowser', true);
+  document.body.appendChild(iframe);
+}
+
+function test_setSelectionRange() {
+  gContext.setSelectionRange(0, 100).then(function() {
+    is(gContext.selectionStart, 0, 'selectionStart was set successfully.');
+    is(gContext.selectionEnd, 5, 'selectionEnd was set successfully.');
+    test_replaceSurroundingText();
+  }, function(e) {
+    ok(false, 'setSelectionRange failed:' + e.name);
+    inputmethod_cleanup();
+  });
+}
+
+function test_replaceSurroundingText() {
+  // Replace 'Httvb' with 'Hito'.
+  gContext.replaceSurroundingText('Hito', 0, 100).then(function() {
+    ok(true, 'replaceSurroundingText finished');
+    inputmethod_cleanup();
+  }, function(e) {
+    ok(false, 'replaceSurroundingText failed: ' + e.name);
+    inputmethod_cleanup();
+  });
+}
+
+</script>
+</pre>
+</body>
+</html>
+