add api UTs

__tests__/version/get-version.test.ts

@@ -0,0 +1,123 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+import {rest} from 'msw'
+import {setupServer} from 'msw/node'
+import {
+  getOldestVersions as _getOldestVersions,
+  RestQueryInfo
+} from '../../src/version'
+import {Observable} from 'rxjs'
+import {getMockedVersionsResponse} from './rest.mock'
+
+const RATE_LIMIT = 99
+
+describe('get versions tests -- mock rest', () => {
+  let server = setupServer()
+
+  beforeEach(() => {
+    server = setupServer()
+    server.listen()
+  })
+
+  afterEach(() => {
+    server.close()
+  })
+
+  it('getOldestVersions -- success', done => {
+    const numVersions = RATE_LIMIT
+    const resp = getMockedVersionsResponse(numVersions)
+
+    server.use(
+      rest.get(
+        'https://api.github.com/users/test-owner/packages/npm/test-package/versions',
+        (req, res, ctx) => {
+          return res(ctx.status(200), ctx.json(resp))
+        }
+      )
+    )
+
+    getOldestVersions({numVersions}).subscribe(result => {
+      expect(result.versions.length).toBe(numVersions)
+      for (let i = 0; i < numVersions; i++) {
+        expect(result.versions[i].id).toBe(resp[i].id)
+        expect(result.versions[i].version).toBe(resp[i].name)
+        expect(result.versions[i].created_at).toBe(resp[i].created_at)
+      }
+      expect(result.paginate).toBe(true)
+      expect(result.totalCount).toBe(numVersions)
+      done()
+    })
+  })
+
+  it('getOldestVersions -- paginate is false when fetched versions is less than page size', done => {
+    const numVersions = 5
+
+    server.use(
+      rest.get(
+        'https://api.github.com/users/test-owner/packages/npm/test-package/versions',
+        (req, res, ctx) => {
+          return res(
+            ctx.status(200),
+            ctx.json(getMockedVersionsResponse(numVersions))
+          )
+        }
+      )
+    )
+
+    // In the call numVersions is set to RATE_LIMIT, but the response has only 5 versions.
+    getOldestVersions().subscribe(result => {
+      expect(result.paginate).toBe(false)
+      done()
+    })
+  })
+
+  it('getOldestVersions -- API error', done => {
+    server.use(
+      rest.get(
+        'https://api.github.com/users/test-owner/packages/npm/test-package/versions',
+        (req, res, ctx) => {
+          return res(ctx.status(500))
+        }
+      )
+    )
+
+    getOldestVersions().subscribe(
+      () => {
+        done.fail('should not get here.')
+      },
+      err => {
+        expect(err).toContain('get versions API failed.')
+        done()
+      }
+    )
+  })
+})
+
+interface Params {
+  owner?: string
+  packageName?: string
+  packageType?: string
+  numVersions?: number
+  page?: number
+  token?: string
+}
+
+const defaultParams = {
+  owner: 'test-owner',
+  packageName: 'test-package',
+  packageType: 'npm',
+  numVersions: RATE_LIMIT,
+  page: 1,
+  token: 'test-token'
+}
+
+function getOldestVersions(params?: Params): Observable<RestQueryInfo> {
+  const p: Required<Params> = {...defaultParams, ...params}
+  return _getOldestVersions(
+    p.owner,
+    p.packageName,
+    p.packageType,
+    p.numVersions,
+    p.page,
+    p.token
+  )
+}