Created ServersImporter test

src/servers/services/ServersImporter.js

@@ -17,12 +17,12 @@ export class ServersImporter {
 
     const reader = new FileReader();
     return new Promise(resolve => {
-      reader.onloadend = e => {
+      reader.addEventListener('loadend', e => {
         const content = e.target.result;
         const servers = this.csvjson.toObject(content);
 
         resolve(servers);
-      };
+      });
       reader.readAsText(file);
     });
   };

test/servers/services/ServersImporter.test.js

@@ -0,0 +1,44 @@
+import { ServersImporter } from '../../../src/servers/services/ServersImporter';
+import sinon from 'sinon';
+
+describe('ServersImporter', () => {
+  const servers = [{ name: 'foo' }, { name: 'bar' }];
+  const csvjsonMock = {
+    toObject: sinon.fake.returns(servers),
+  };
+  const importer = new ServersImporter(csvjsonMock);
+
+  beforeEach(() => csvjsonMock.toObject.resetHistory());
+
+  describe('importServersFromFile', () => {
+    it('rejects with error if no file was provided', async () => {
+      try {
+        await importer.importServersFromFile();
+      } catch (e) {
+        expect(e).toEqual('No file provided or file is not a CSV');
+      }
+    });
+
+    it('rejects with error if provided file is not a CSV', async () => {
+      try {
+        await importer.importServersFromFile({ type: 'text/html' });
+      } catch (e) {
+        expect(e).toEqual('No file provided or file is not a CSV');
+      }
+    });
+
+    it('reads file when a CSV is provided', async () => {
+      const readAsText = sinon.fake.returns('');
+      global.FileReader = function FileReader() {
+        this.readAsText = readAsText;
+        this.addEventListener = (eventName, listener) =>
+          listener({ target: { result: '' } });
+      };
+
+      await importer.importServersFromFile({ type: 'text/csv' });
+
+      expect(readAsText.callCount).toEqual(1);
+      expect(csvjsonMock.toObject.callCount).toEqual(1);
+    });
+  });
+});