fix: file uploader error handling and tests

src/test/FileUploader.spec.ts

@@ -0,0 +1,93 @@
+import { FileUploader } from '../FileUploader'
+import { UploadFile } from '../types';
+
+(global as any).fetch = jest.fn().mockImplementation(() =>
+  Promise.resolve({
+    text: () => Promise.resolve(sampleResponse),
+  })
+);
+
+it('should upload successfully', async (done) => {
+  const fileUploader =
+      new FileUploader(
+        '/sample/apploc',
+        'https://sample.server.com',
+        '/jobs/path',
+        null,
+        null
+      )
+    
+    const sasJob = 'test/upload'
+    const files: UploadFile[] = [
+      {
+        file: new File([''], 'testfile'),
+        fileName: 'testfile'
+      }
+    ];
+    const params = {table: 'libtable'}
+
+    fileUploader.uploadFile(sasJob, files, params).then(
+      (res: any) => {
+        if (JSON.stringify(res) === JSON.stringify(JSON.parse(sampleResponse))) done()
+      }
+    )
+})
+
+it('should throw no files error', async (done) => {
+  const fileUploader =
+      new FileUploader(
+        '/sample/apploc',
+        'https://sample.server.com',
+        '/jobs/path',
+        null,
+        null
+      )
+    
+    const sasJob = 'test/upload'
+    const files: UploadFile[] = [];
+    const params = {table: 'libtable'}
+
+    fileUploader.uploadFile(sasJob, files, params).then(
+      (res: any) => {},
+      (err: any) => {
+        if (err.error.message === 'At least one file must be provided.') done()
+      }
+    )
+})
+
+it('should throw no sasJob error', async (done) => {
+  const fileUploader =
+      new FileUploader(
+        '/sample/apploc',
+        'https://sample.server.com',
+        '/jobs/path',
+        null,
+        null
+      )
+    
+    const sasJob = ''
+    const files: UploadFile[] = [
+      {
+        file: new File([''], 'testfile'),
+        fileName: 'testfile'
+      }
+    ];
+    const params = {table: 'libtable'}
+
+    fileUploader.uploadFile(sasJob, files, params).then(
+      (res: any) => {},
+      (err: any) => {
+        if (err.error.message === 'sasJob must be provided.') done()
+      }
+    )
+})
+
+const sampleResponse = `{
+  "SYSUSERID": "cas",
+  "_DEBUG":" ",
+  "SYS_JES_JOB_URI": "/jobExecution/jobs/000-000-000-000",
+  "_PROGRAM" : "/Public/app/editors/loadfile",
+  "SYSCC" : "0",
+  "SYSJOBID" : "117382",
+  "SYSWARNINGTEXT" : ""
+}`