Add tests for isPluginRequired.

index.js

@@ -99,14 +99,16 @@ module.exports = {
     }
   },
 
-  isPluginRequired(plugin) {
-    const isPluginRequired = require('babel-preset-env').isPluginRequired;
+  isPluginRequired(pluginName) {
     let targets = this._getTargets();
 
     // if no targets are setup, assume that all plugins are required
     if (!targets) { return true; }
 
-    return isPluginRequired(targets, plugin);
+    const isPluginRequired = require('babel-preset-env').isPluginRequired;
+    const pluginList = require('babel-preset-env/data/plugins');
+
+    return isPluginRequired(targets, pluginList[pluginName]);
   },
 
   _getAddonOptions: function() {
@@ -187,7 +189,7 @@ module.exports = {
   },
 
   _getTargets() {
-    return this.project && this.project.targets && this.project.targets.browsers;
+    return this.project && this.project.targets && this.project.targets;
   },
 
   _getModulesPlugin() {

node-tests/addon-test.js

@@ -378,4 +378,31 @@ describe('ember-cli-babel', function() {
       expect(result.resolveModuleSource).to.equal(undefined);
     });
   });
+
+  describe('isPluginRequired', function() {
+    it('returns true when no targets are specified', function() {
+      this.addon.project.targets = null;
+
+      let pluginRequired = this.addon.isPluginRequired('transform-regenerator');
+      expect(pluginRequired).to.be.true;
+    });
+
+    it('returns true when targets require plugin', function() {
+      this.addon.project.targets = {
+        browsers: ['ie 9']
+      };
+
+      let pluginRequired = this.addon.isPluginRequired('transform-regenerator');
+      expect(pluginRequired).to.be.true;
+    });
+
+    it('returns false when targets do not require plugin', function() {
+      this.addon.project.targets = {
+        browsers: ['last 2 chrome versions']
+      };
+
+      let pluginRequired = this.addon.isPluginRequired('transform-regenerator');
+      expect(pluginRequired).to.be.false;
+    });
+  });
 });