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diff --git a/devtools/client/shared/components/test/mochitest/test_reps_infinity.html b/devtools/client/shared/components/test/mochitest/test_reps_infinity.html
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index 000000000..e3a7e871f
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+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<!DOCTYPE HTML>
+<html>
+<!--
+Test Infinity rep
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Rep test - Infinity</title>
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+</head>
+<body>
+<pre id="test">
+<script src="head.js" type="application/javascript;version=1.8"></script>
+<script type="application/javascript;version=1.8">
+"use strict";
+
+window.onload = Task.async(function* () {
+  let { Rep } = browserRequire("devtools/client/shared/components/reps/rep");
+  let { InfinityRep } = browserRequire("devtools/client/shared/components/reps/infinity");
+
+  try {
+    yield testInfinity();
+    yield testNegativeInfinity();
+  } catch (e) {
+    ok(false, "Got an error: " + DevToolsUtils.safeErrorString(e));
+  } finally {
+    SimpleTest.finish();
+  }
+
+  function testInfinity() {
+    const stub = getGripStub("testInfinity");
+    const renderedRep = shallowRenderComponent(Rep, { object: stub });
+    is(renderedRep.type, InfinityRep.rep,
+      `Rep correctly selects ${InfinityRep.rep.displayName} for Infinity value`);
+
+    const renderedComponent = renderComponent(InfinityRep.rep, { object: stub });
+    is(renderedComponent.textContent, "Infinity",
+      "Infinity rep has expected text content for Infinity");
+  }
+
+  function testNegativeInfinity() {
+    const stub = getGripStub("testNegativeInfinity");
+    const renderedRep = shallowRenderComponent(Rep, { object: stub });
+    is(renderedRep.type, InfinityRep.rep,
+      `Rep correctly selects ${InfinityRep.rep.displayName} for negative Infinity value`);
+
+    const renderedComponent = renderComponent(InfinityRep.rep, { object: stub });
+    is(renderedComponent.textContent, "-Infinity",
+      "Infinity rep has expected text content for negative Infinity");
+  }
+
+  function getGripStub(name) {
+    switch (name) {
+      case "testInfinity":
+        return {
+          type: "Infinity"
+        };
+      case "testNegativeInfinity":
+        return {
+          type: "-Infinity"
+        };
+    }
+    return null;
+  }
+});
+</script>
+</pre>
+</body>
+</html>