test(core/presentation): add basic tests for ApplicationsPickerInput.tsx

app/scripts/modules/core/src/widgets/ApplicationsPickerInput.spec.tsx

@@ -0,0 +1,36 @@
+import { ApplicationReader } from 'core/application';
+import { IValidator } from 'core/presentation';
+import { mount } from 'enzyme';
+import React from 'react';
+import { ApplicationsPickerInput } from './ApplicationsPickerInput';
+
+describe('ApplicationsPickerInput', () => {
+  function listApplicationsSpy() {
+    return spyOn(ApplicationReader, 'listApplications').and.callFake(() => {
+      return Promise.resolve([{ name: 'app1' }, { name: 'app2' }]);
+    });
+  }
+
+  function asyncTick() {
+    return new Promise(resolve => setTimeout(resolve));
+  }
+
+  it('lists applications on mount', () => {
+    const spy = listApplicationsSpy();
+    mount(<ApplicationsPickerInput />);
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+
+  it('registers a validator that validates the selected application exists', async () => {
+    listApplicationsSpy();
+    const validationSpy = jasmine.createSpyObj(['addValidator', 'removeValidator', 'revalidate']);
+    mount(<ApplicationsPickerInput value={'app1'} validation={validationSpy} />);
+    await asyncTick(); // let the listApplications promise resolve
+
+    expect(validationSpy.addValidator).toHaveBeenCalledTimes(1);
+    const validator: IValidator = validationSpy.addValidator.calls.mostRecent().args[0];
+
+    expect(validator('app1')).toBeFalsy();
+    expect(validator('notexists')).toContain('notexists does not exist');
+  });
+});