Generic Vue Alert Component

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/23125

app/assets/javascripts/vue_alerts.js

+import Vue from 'vue';
+import { parseBoolean } from '~/lib/utils/common_utils';
+import DismissibleAlert from '~/vue_shared/components/dismissible_alert.vue';
+
+const mountVueAlert = el => {
+  const props = {
+    html: el.innerHTML,
+  };
+  const attrs = {
+    ...el.dataset,
+    dismissible: parseBoolean(el.dataset.dismissible),
+  };
+
+  return new Vue({
+    el,
+    render(h) {
+      return h(DismissibleAlert, { props, attrs });
+    },
+  });
+};
+
+export default () => [...document.querySelectorAll('.js-vue-alert')].map(mountVueAlert);

app/assets/javascripts/vue_shared/components/dismissible_alert.vue

+<script>
+import { GlAlert } from '@gitlab/ui';
+
+export default {
+  components: {
+    GlAlert,
+  },
+  props: {
+    html: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      isDismissed: false,
+    };
+  },
+  methods: {
+    dismiss() {
+      this.isDismissed = true;
+    },
+  },
+};
+</script>
+
+<template>
+  <gl-alert v-if="!isDismissed" v-bind="$attrs" @dismiss="dismiss" v-on="$listeners">
+    <div v-html="html"></div>
+  </gl-alert>
+</template>

spec/frontend/vue_alerts_spec.js

+import Vue from 'vue';
+import initVueAlerts from '~/vue_alerts';
+import { setHTMLFixture } from 'helpers/fixtures';
+import { TEST_HOST } from 'helpers/test_constants';
+
+describe('VueAlerts', () => {
+  const alerts = [
+    {
+      title: 'Lorem',
+      html: 'Lorem <strong>Ipsum</strong>',
+      dismissible: true,
+      primaryButtonText: 'Okay!',
+      primaryButtonLink: `${TEST_HOST}/okay`,
+      variant: 'tip',
+    },
+    {
+      title: 'Hello',
+      html: 'Hello <strong>World</strong>',
+      dismissible: false,
+      primaryButtonText: 'No!',
+      primaryButtonLink: `${TEST_HOST}/no`,
+      variant: 'info',
+    },
+  ];
+
+  beforeEach(() => {
+    setHTMLFixture(
+      alerts
+        .map(
+          x => `
+    <div class="js-vue-alert" 
+      data-dismissible="${x.dismissible}" 
+      data-title="${x.title}"
+      data-primary-button-text="${x.primaryButtonText}"
+      data-primary-button-link="${x.primaryButtonLink}"
+      data-variant="${x.variant}">${x.html}</div>
+    `,
+        )
+        .join('\n'),
+    );
+  });
+
+  const findJsHooks = () => document.querySelectorAll('.js-vue-alert');
+  const findAlerts = () => document.querySelectorAll('.gl-alert');
+  const findAlertDismiss = alert => alert.querySelector('.gl-alert-dismiss');
+
+  const serializeAlert = alert => ({
+    title: alert.querySelector('.gl-alert-title').textContent.trim(),
+    html: alert.querySelector('.gl-alert-body div').innerHTML,
+    dismissible: Boolean(alert.querySelector('.gl-alert-dismiss')),
+    primaryButtonText: alert.querySelector('.gl-alert-action').textContent.trim(),
+    primaryButtonLink: alert.querySelector('.gl-alert-action').href,
+    variant: [...alert.classList].find(x => x.match('gl-alert-')).replace('gl-alert-', ''),
+  });
+
+  it('starts with only JsHooks', () => {
+    expect(findJsHooks().length).toEqual(alerts.length);
+    expect(findAlerts().length).toEqual(0);
+  });
+
+  describe('when mounted', () => {
+    beforeEach(() => {
+      initVueAlerts();
+    });
+
+    it('replaces JsHook with GlAlert', () => {
+      expect(findJsHooks().length).toEqual(0);
+      expect(findAlerts().length).toEqual(alerts.length);
+    });
+
+    it('passes along props to gl-alert', () => {
+      expect([...findAlerts()].map(serializeAlert)).toEqual(alerts);
+    });
+
+    describe('when dismissed', () => {
+      beforeEach(() => {
+        findAlertDismiss(findAlerts()[0]).click();
+
+        return Vue.nextTick();
+      });
+
+      it('hides the alert', () => {
+        expect(findAlerts().length).toEqual(alerts.length - 1);
+      });
+    });
+  });
+});

spec/frontend/vue_shared/components/dismissible_alert_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlAlert } from '@gitlab/ui';
+import DismissibleAlert from '~/vue_shared/components/dismissible_alert.vue';
+
+const TEST_HTML = 'Hello World! <strong>Foo</strong>';
+
+describe('vue_shared/components/dismissible_alert', () => {
+  const testAlertProps = {
+    primaryButtonText: 'Lorem ipsum',
+    primaryButtonLink: '/lorem/ipsum',
+  };
+
+  let wrapper;
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(DismissibleAlert, {
+      propsData: {
+        html: TEST_HTML,
+        ...testAlertProps,
+        ...props,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const findAlert = () => wrapper.find(GlAlert);
+
+  describe('with default', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('shows alert', () => {
+      const alert = findAlert();
+
+      expect(alert.exists()).toBe(true);
+      expect(alert.props()).toEqual(expect.objectContaining(testAlertProps));
+    });
+
+    it('shows given HTML', () => {
+      expect(findAlert().html()).toContain(TEST_HTML);
+    });
+
+    describe('when dismissed', () => {
+      beforeEach(() => {
+        findAlert().vm.$emit('dismiss');
+      });
+
+      it('hides the alert', () => {
+        expect(findAlert().exists()).toBe(false);
+      });
+    });
+  });
+});