test: add tests for extractPackageApi

src/extract-package-api.test.ts

@@ -0,0 +1,30 @@
+import { expect, test } from "vitest";
+import {
+  InstallPackageError,
+  PackageNameError,
+  PackageTypesError,
+} from "./errors";
+import { extractPackageApi } from "./extract-package-api";
+
+test("invalid package name", async () => {
+  const res = await extractPackageApi({ pkg: "" });
+  expect(res.isErr()).toBe(true);
+  expect(res._unsafeUnwrapErr() instanceof PackageNameError).toBe(true);
+});
+
+test("package not found", async () => {
+  const res = await extractPackageApi({ pkg: "@jsdocs-io/not-found" });
+  expect(res.isErr()).toBe(true);
+  expect(res._unsafeUnwrapErr() instanceof InstallPackageError).toBe(true);
+});
+
+test("package types not found", async () => {
+  const res = await extractPackageApi({ pkg: "[email protected]" });
+  expect(res.isErr()).toBe(true);
+  expect(res._unsafeUnwrapErr() instanceof PackageTypesError).toBe(true);
+});
+
+test("package successfully analyzed", async () => {
+  const res = await extractPackageApi({ pkg: "[email protected]" });
+  expect(res.isOk()).toBe(true);
+});