Convert markdown-test mocking to babel-plugin-mockable-imports

src/sidebar/components/test/markdown-test.js

 'use strict';
 
 const angular = require('angular');
-const proxyquire = require('proxyquire');
 
 const util = require('../../directive/test/util');
-const noCallThru = require('../../../shared/test/util').noCallThru;
+const markdown = require('../markdown');
 
 describe('markdown', function() {
   function isHidden(element) {
@@ -40,46 +39,39 @@ describe('markdown', function() {
   }
 
   before(function() {
-    angular.module('app').component(
-      'markdown',
-      proxyquire(
-        '../markdown',
-        noCallThru({
-          angular: angular,
-          katex: {
-            renderToString: function(input) {
-              return 'math:' + input.replace(/$$/g, '');
-            },
-          },
+    angular.module('app', []).component('markdown', markdown);
+  });
+
+  beforeEach(function() {
+    angular.mock.module('app');
+
+    markdown.$imports.$mock({
       'lodash.debounce': function(fn) {
         // Make input change debouncing synchronous in tests
         return function() {
           fn();
         };
       },
-          '../render-markdown': noCallThru(function(markdown) {
+      '../render-markdown': markdown => {
         return 'rendered:' + markdown;
-          }),
-
+      },
       '../markdown-commands': {
         convertSelectionToLink: mockFormattingCommand,
         toggleBlockStyle: mockFormattingCommand,
         toggleSpanStyle: mockFormattingCommand,
         LinkType: require('../../markdown-commands').LinkType,
       },
-          '../media-embedder': noCallThru({
+      '../media-embedder': {
         replaceLinksWithEmbeds: function(element) {
           // Tag the element as having been processed
           element.dataset.replacedLinksWithEmbeds = 'yes';
         },
-          }),
-        })
-      )
-    );
+      },
+    });
   });
 
-  beforeEach(function() {
-    angular.mock.module('app');
+  afterEach(() => {
+    markdown.$imports.$restore();
   });
 
   describe('read only state', function() {