Introduce basic js unit tests

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/tests/unit/specs/components/Post/PostListItem.spec.ts

@@ -0,0 +1,45 @@
+import { config, createLocalVue, mount } from "@vue/test-utils";
+import PostListItem from "@/components/Post/PostListItem.vue";
+import Buefy from "buefy";
+import VueRouter from "vue-router";
+import { routes } from "@/router";
+
+const localVue = createLocalVue();
+localVue.use(Buefy);
+localVue.use(VueRouter);
+const router = new VueRouter({ routes, mode: "history" });
+config.mocks.$t = (key: string): string => key;
+
+const postData = {
+  id: "1",
+  slug: "my-blog-post-some-uuid",
+  title: "My Blog Post",
+  body: "My content",
+  insertedAt: "2020-12-02T09:01:20.873Z",
+};
+
+const generateWrapper = (customPostData: Record<string, unknown> = {}) => {
+  return mount(PostListItem, {
+    localVue,
+    router,
+    propsData: {
+      post: { ...postData, ...customPostData },
+    },
+  });
+};
+
+describe("PostListItem", () => {
+  it("renders post list item with basic informations", () => {
+    const wrapper = generateWrapper();
+
+    // can't use the snapshot feature because of `ago`
+
+    expect(
+      wrapper.find("a.post-minimalist-card-wrapper").attributes("href")
+    ).toBe(`/p/${postData.slug}`);
+
+    expect(wrapper.find(".post-minimalist-title").text()).toContain(
+      postData.title
+    );
+  });
+});