add test for basic success case of getGroupRDF.downloadAllRdfForGroup()

pull up some mockSinopiaClient setup code that can be shared from a prior test, and import fs functions

__tests__/getGroupRDF.test.js

@@ -1,11 +1,15 @@
 import config from 'config'
+import fs from 'fs'
 import * as getGroupRDF from '../src/getGroupRDF'
 import SinopiaServer from 'sinopia_server'
 
+const groupResources = { 'group1': ['resource1', 'resource2', 'resource3'] }
+const resourceContent = { 'resource1': 'resource1content', 'resource2': 'resource2content', 'resource3': 'resource3content' }
+
 const mockSinopiaClient = jest.fn()
-mockSinopiaClient.getGroupWithHttpInfo = jest.fn()
-mockSinopiaClient.getResourceWithHttpInfo = jest.fn()
-mockSinopiaClient.apiClient = jest.fn()
+mockSinopiaClient.apiClient = jest.fn() // need this field present so sinopiaClient() function can set .basePath on it.
+mockSinopiaClient.getGroupWithHttpInfo = async (groupName) => { return (!groupResources[groupName] ? null : { response: { body: {contains: groupResources[groupName] } } }) }
+mockSinopiaClient.getResourceWithHttpInfo = async (groupName, resourceName) => { return (!groupResources[groupName] ? null : { response: { text: resourceContent[resourceName] } }) }
 
 jest.spyOn(SinopiaServer, 'LDPApi').mockImplementation(() => mockSinopiaClient)
 
@@ -18,13 +22,36 @@ describe('getGroupRDF', () => {
 
   describe('getResourceTextFromServer', () => {
     it('retrieves the specified resource from the server and returns the RDF as text', async () => {
-      const groupResources = { 'group1': ['resource1', 'resource2', 'resource3'] }
-      const resourceContent = { 'resource1': 'resource1content', 'resource2': 'resource2content', 'resource3': 'resource3content' }
+      expect(await getGroupRDF.getResourceTextFromServer('group1', 'resource2')).toEqual('resource2content')
+    })
+  })
 
-      mockSinopiaClient.getGroupWithHttpInfo = async (groupName) => { return (!groupResources[groupName] ? null : { response: { body: {contains: resourceList } } }) }
-      mockSinopiaClient.getResourceWithHttpInfo = async (groupName, resourceName) => { return (!groupResources[groupName] ? null : { response: { text: resourceContent[resourceName] } }) }
+  describe('downloadAllRdfForGroup', () => {
+    it('retrieves the RDF resources for the specified group, and saves the RDF text (on file per resource, in a dated sub-directory)', async () => {
+      const dlDateLowerBound = new Date()
+      await getGroupRDF.downloadAllRdfForGroup('group1')
+      const dlDateUpperBound = new Date()
 
-      expect(await getGroupRDF.getResourceTextFromServer('group1', 'resource2')).toEqual('resource2content')
+      // assume we just want the latest output dir in the export base dir, since we should be the only ones writing there
+      const exportBaseDirContents = fs.readdirSync(`./${config.get('exportBasePath')}`)
+      const groupDirName = exportBaseDirContents[exportBaseDirContents.length-1]
+
+      // RDF for group exported to subdirectory with name like 'group1_2019-08-05T01:34:13.143Z'
+      const groupDirDate = new Date(/^group1_(.*)$/.exec(groupDirName)[1])
+      // .toBeGreaterThan and .toBeLessThan only work for numbers
+      expect(dlDateLowerBound < groupDirDate && groupDirDate < dlDateUpperBound).toBeTruthy()
+
+      const groupDirPath = `./${config.get('exportBasePath')}/${groupDirName}`
+      const groupDirContents = fs.readdirSync(groupDirPath)
+      expect(groupDirContents).toEqual(['complete.log', 'resource1', 'resource2', 'resource3'])
+
+      expect(fs.readFileSync(`${groupDirPath}/resource1`).toString()).toEqual('resource1content')
+      expect(fs.readFileSync(`${groupDirPath}/resource2`).toString()).toEqual('resource2content')
+      expect(fs.readFileSync(`${groupDirPath}/resource3`).toString()).toEqual('resource3content')
+      const completionLogText = fs.readFileSync(`${groupDirPath}/complete.log`).toString()
+      // completion log text should have date, should fall between group dir creation and downloadAllRdfForGroup resolving
+      const completionLogDate = new Date(/^completed export of group1 at (.*)$/.exec(completionLogText)[1])
+      expect(groupDirDate < completionLogDate && completionLogDate < dlDateUpperBound)
     })
   })
 })