test: add unit tests

package.json

@@ -76,7 +76,7 @@
     "tslib": "^2.4.0"
   },
   "devDependencies": {
-    "@byndyusoft/eslint-config": "2.1.1",
+    "@byndyusoft/eslint-config": "2.4.1",
     "@byndyusoft/tsconfig": "1.2.0",
     "@commitlint/cli": "17.1.2",
     "@commitlint/config-conventional": "17.1.0",
@@ -89,11 +89,13 @@
     "husky": "8.0.1",
     "jest": "29.2.0",
     "jest-extended": "3.1.0",
+    "jest-mock-extended": "3.0.1",
     "lint-staged": "13.0.3",
     "markdownlint-cli": "0.32.2",
     "pinst": "3.0.0",
     "prettier": "2.7.1",
     "prettier-plugin-packagejson": "2.3.0",
+    "reflect-metadata": "0.1.13",
     "semantic-release": "19.0.5",
     "shx": "0.3.4",
     "ts-jest": "29.0.3",

src/__tests__/httpClient.test.ts

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2023 Byndyusoft
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { AxiosResponse } from "axios";
+import { mock, MockProxy } from "jest-mock-extended";
+
+import { HttpClient } from "../httpClient";
+import { HttpCoreClient } from "../httpCoreClient";
+
+describe("HttpClient", () => {
+  let httpClient: HttpClient;
+
+  let httpCoreClient: MockProxy<HttpCoreClient>;
+
+  const httpMethodsWithoutBody = [
+    "delete" as const,
+    "get" as const,
+    "head" as const,
+  ];
+
+  const httpMethodsWithBody = [
+    "patch" as const,
+    "post" as const,
+    "put" as const,
+  ];
+
+  const responseData = {
+    answer: 42,
+  };
+
+  const response = {
+    data: responseData,
+  } as unknown as AxiosResponse;
+
+  beforeAll(() => {
+    httpCoreClient = mock();
+
+    httpClient = new HttpClient(httpCoreClient);
+  });
+
+  it.each(httpMethodsWithoutBody)("must perform %s request", async (method) => {
+    httpCoreClient[method].mockResolvedValue(response);
+
+    await expect(
+      httpClient[method]("/some-path", {
+        params: {
+          q: "search",
+        },
+      }),
+    ).resolves.toStrictEqual(responseData);
+
+    expect(httpCoreClient[method]).toHaveBeenCalledWith("/some-path", {
+      params: {
+        q: "search",
+      },
+    });
+  });
+
+  it.each(httpMethodsWithBody)("must perform %s request", async (method) => {
+    httpCoreClient[method].mockResolvedValue(response);
+
+    await expect(
+      httpClient[method](
+        "/some-path",
+        {
+          payload: 1,
+        },
+        {
+          params: {
+            q: "search",
+          },
+        },
+      ),
+    ).resolves.toStrictEqual(responseData);
+
+    expect(httpCoreClient[method]).toHaveBeenCalledWith(
+      "/some-path",
+      {
+        payload: 1,
+      },
+      {
+        params: {
+          q: "search",
+        },
+      },
+    );
+  });
+
+  it("must perform request", async () => {
+    httpCoreClient.request.mockResolvedValue(response);
+
+    await expect(
+      httpClient.request({
+        url: "/some-path",
+        params: {
+          q: "search",
+        },
+      }),
+    ).resolves.toStrictEqual(responseData);
+
+    expect(httpCoreClient.request).toHaveBeenCalledWith({
+      url: "/some-path",
+      params: {
+        q: "search",
+      },
+    });
+  });
+
+  it("must perform endpoint request", async () => {
+    httpCoreClient.endpoint.mockResolvedValue(response);
+
+    await expect(
+      httpClient.endpoint("GET /some-path", {
+        q: "search",
+      }),
+    ).resolves.toStrictEqual(responseData);
+
+    expect(httpCoreClient.endpoint).toHaveBeenCalledWith("GET /some-path", {
+      q: "search",
+    });
+  });
+});