1 files changed, 109 insertions, 0 deletions
diff --git a/spec/frontend/pages/milestones/shared/components/delete_milestone_modal_spec.js b/spec/frontend/pages/milestones/shared/components/delete_milestone_modal_spec.js
new file mode 100644
index 00000000000..ff5dc6d8988
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+++ b/spec/frontend/pages/milestones/shared/components/delete_milestone_modal_spec.js
@@ -0,0 +1,109 @@
+import Vue from 'vue';
+import { redirectTo } from '~/lib/utils/url_utility';
+import mountComponent from 'helpers/vue_mount_component_helper';
+import axios from '~/lib/utils/axios_utils';
+import deleteMilestoneModal from '~/pages/milestones/shared/components/delete_milestone_modal.vue';
+import eventHub from '~/pages/milestones/shared/event_hub';
+
+jest.mock('~/lib/utils/url_utility', () => ({
+  ...jest.requireActual('~/lib/utils/url_utility'),
+  redirectTo: jest.fn(),
+}));
+
+describe('delete_milestone_modal.vue', () => {
+  const Component = Vue.extend(deleteMilestoneModal);
+  const props = {
+    issueCount: 1,
+    mergeRequestCount: 2,
+    milestoneId: 3,
+    milestoneTitle: 'my milestone title',
+    milestoneUrl: `${gl.TEST_HOST}/delete_milestone_modal.vue/milestone`,
+  };
+  let vm;
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  describe('onSubmit', () => {
+    beforeEach(() => {
+      vm = mountComponent(Component, props);
+      jest.spyOn(eventHub, '$emit').mockImplementation(() => {});
+    });
+
+    it('deletes milestone and redirects to overview page', done => {
+      const responseURL = `${gl.TEST_HOST}/delete_milestone_modal.vue/milestoneOverview`;
+      jest.spyOn(axios, 'delete').mockImplementation(url => {
+        expect(url).toBe(props.milestoneUrl);
+        expect(eventHub.$emit).toHaveBeenCalledWith(
+          'deleteMilestoneModal.requestStarted',
+          props.milestoneUrl,
+        );
+        eventHub.$emit.mockReset();
+        return Promise.resolve({
+          request: {
+            responseURL,
+          },
+        });
+      });
+
+      vm.onSubmit()
+        .then(() => {
+          expect(redirectTo).toHaveBeenCalledWith(responseURL);
+          expect(eventHub.$emit).toHaveBeenCalledWith('deleteMilestoneModal.requestFinished', {
+            milestoneUrl: props.milestoneUrl,
+            successful: true,
+          });
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('displays error if deleting milestone failed', done => {
+      const dummyError = new Error('deleting milestone failed');
+      dummyError.response = { status: 418 };
+      jest.spyOn(axios, 'delete').mockImplementation(url => {
+        expect(url).toBe(props.milestoneUrl);
+        expect(eventHub.$emit).toHaveBeenCalledWith(
+          'deleteMilestoneModal.requestStarted',
+          props.milestoneUrl,
+        );
+        eventHub.$emit.mockReset();
+        return Promise.reject(dummyError);
+      });
+
+      vm.onSubmit()
+        .catch(error => {
+          expect(error).toBe(dummyError);
+          expect(redirectTo).not.toHaveBeenCalled();
+          expect(eventHub.$emit).toHaveBeenCalledWith('deleteMilestoneModal.requestFinished', {
+            milestoneUrl: props.milestoneUrl,
+            successful: false,
+          });
+        })
+        .then(done)
+        .catch(done.fail);
+    });
+  });
+
+  describe('text', () => {
+    it('contains the issue and milestone count', () => {
+      vm = mountComponent(Component, props);
+      const value = vm.text;
+
+      expect(value).toContain('remove it from 1 issue and 2 merge requests');
+    });
+
+    it('contains neither issue nor milestone count', () => {
+      vm = mountComponent(Component, {
+        ...props,
+        issueCount: 0,
+        mergeRequestCount: 0,
+      });
+
+      const value = vm.text;
+
+      expect(value).toContain('is not currently used');
+    });
+  });
+});