[chrome/nav] added tests for the exposed chrome apis

src/ui/public/chrome/api/__tests__/nav.js

@@ -0,0 +1,40 @@
+import expect from 'expect.js';
+
+import initChromeNavApi from 'ui/chrome/api/nav';
+
+const basePath = '/someBasePath';
+
+function getChrome(customInternals = { basePath }) {
+  const chrome = {};
+  initChromeNavApi(chrome, {
+    nav: [],
+    ...customInternals,
+  });
+  return chrome;
+}
+
+describe('chrome nav apis', function () {
+  describe('#getBasePath()', function () {
+    it('returns the basePath', function () {
+      const chrome = getChrome();
+      expect(chrome.getBasePath()).to.be(basePath);
+    });
+  });
+
+  describe('#addBasePath()', function () {
+    it('returns undefined when nothing is passed', function () {
+      const chrome = getChrome();
+      expect(chrome.addBasePath()).to.be(undefined);
+    });
+
+    it('prepends the base path when the input is a path', function () {
+      const chrome = getChrome();
+      expect(chrome.addBasePath('/other/path')).to.be(`${basePath}/other/path`);
+    });
+
+    it('ignores non-path urls', function () {
+      const chrome = getChrome();
+      expect(chrome.addBasePath('http://github.com/elastic/kibana')).to.be('http://github.com/elastic/kibana');
+    });
+  });
+});