chore(refactor): split up and add tests for core functionality

src/api/viya/spec/saveLog.spec.ts

@@ -0,0 +1,72 @@
+import { Logger, LogLevel } from '@sasjs/utils'
+import * as fileModule from '@sasjs/utils/file'
+import { RequestClient } from '../../../request/RequestClient'
+import * as fetchLogsModule from '../../../utils/fetchLogByChunks'
+import { saveLog } from '../saveLog'
+import { mockJob } from './mockResponses'
+
+const requestClient = new (<jest.Mock<RequestClient>>RequestClient)()
+
+describe('saveLog', () => {
+  beforeEach(() => {
+    ;(process as any).logger = new Logger(LogLevel.Off)
+    setupMocks()
+  })
+
+  it('should return immediately if shouldSaveLog is false', async () => {
+    await saveLog(mockJob, requestClient, false, '/test', 't0k3n')
+
+    expect(fetchLogsModule.fetchLogByChunks).not.toHaveBeenCalled()
+    expect(fileModule.createFile).not.toHaveBeenCalled()
+  })
+
+  it('should throw an error when a valid access token is not provided', async () => {
+    const error = await saveLog(mockJob, requestClient, true, '/test').catch(
+      (e) => e
+    )
+
+    expect(error.message).toContain(
+      `Logs for job ${mockJob.id} cannot be fetched without a valid access token.`
+    )
+  })
+
+  it('should throw an error when the log URL is not available', async () => {
+    const error = await saveLog(
+      { ...mockJob, links: mockJob.links.filter((l) => l.rel !== 'log') },
+      requestClient,
+      true,
+      '/test',
+      't0k3n'
+    ).catch((e) => e)
+
+    expect(error.message).toContain(
+      `Log URL for job ${mockJob.id} was not found.`
+    )
+  })
+
+  it('should fetch and save logs to the given path', async () => {
+    await saveLog(mockJob, requestClient, true, '/test', 't0k3n')
+
+    expect(fetchLogsModule.fetchLogByChunks).toHaveBeenCalledWith(
+      requestClient,
+      't0k3n',
+      '/log/content',
+      100
+    )
+    expect(fileModule.createFile).toHaveBeenCalledWith('/test', 'Test Log')
+  })
+})
+
+const setupMocks = () => {
+  jest.restoreAllMocks()
+  jest.mock('../../../request/RequestClient')
+  jest.mock('../../../utils/fetchLogByChunks')
+  jest.mock('@sasjs/utils')
+
+  jest
+    .spyOn(fetchLogsModule, 'fetchLogByChunks')
+    .mockImplementation(() => Promise.resolve('Test Log'))
+  jest
+    .spyOn(fileModule, 'createFile')
+    .mockImplementation(() => Promise.resolve())
+}