diff --git a/web/package.json b/web/package.json
index 94b0ee603..be63120dc 100644
--- a/web/package.json
+++ b/web/package.json
@@ -25,6 +25,7 @@
   "dependencies": {
     "bootstrap": "^3.3.7",
     "classnames": "^2.2.5",
+    "jest-fetch-mock": "^1.1.1",
     "lodash": "^4.17.4",
     "prop-types": "^15.5.0",
     "react": "^15.4.2",
diff --git a/web/src/js/__tests__/components/Header/FilterDocsSpec.js b/web/src/js/__tests__/components/Header/FilterDocsSpec.js
new file mode 100644
index 000000000..cb722d6d5
--- /dev/null
+++ b/web/src/js/__tests__/components/Header/FilterDocsSpec.js
@@ -0,0 +1,19 @@
+import React from 'react'
+import renderer from 'react-test-renderer'
+import FilterDocs from '../../../components/Header/FilterDocs'
+import mockFetch from 'jest-fetch-mock'
+
+global.fetch = mockFetch
+
+describe('FilterDocs Component', () => {
+
+    it('should render correctly', () => {
+        // fetch successes
+        fetch.mockResponseOnce(JSON.stringify({commands: [['cmd1', 'foo'], ['cmd2', 'bar']]}), {status: 200})
+        let filterDocs = renderer.create(<FilterDocs/>),
+            tree = filterDocs.toJSON()
+        // [TODO] doc in render() could not be set correctly.
+        console.log(tree)
+    })
+
+})
diff --git a/web/yarn.lock b/web/yarn.lock
index 602b49169..069a8590d 100644
--- a/web/yarn.lock
+++ b/web/yarn.lock
@@ -2888,6 +2888,12 @@ jest-environment-node@^19.0.0:
     jest-mock "^19.0.0"
     jest-util "^19.0.0"
 
+jest-fetch-mock@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/jest-fetch-mock/-/jest-fetch-mock-1.1.1.tgz#7548b6d0c0c77071e9f8652fcb4f8d537e988d1f"
+  dependencies:
+    whatwg-fetch "1.0.0"
+
 jest-file-exists@^19.0.0:
   version "19.0.0"
   resolved "https://registry.yarnpkg.com/jest-file-exists/-/jest-file-exists-19.0.0.tgz#cca2e587a11ec92e24cfeab3f8a94d657f3fceb8"
@@ -5180,6 +5186,10 @@ whatwg-encoding@^1.0.1:
   dependencies:
     iconv-lite "0.4.13"
 
+whatwg-fetch@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-1.0.0.tgz#01c2ac4df40e236aaa18480e3be74bd5c8eb798e"
+
 whatwg-fetch@>=0.10.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.2.tgz#fe294d1d89e36c5be8b3195057f2e4bc74fc980e"