Add ReadableArrayResponse tests

Signed-off-by: Sean Tan <seant@splunk.com>

packages/backend-common/src/reading/AwsS3UrlReader.test.ts

@@ -139,6 +139,7 @@ describe('AwsS3UrlReader', () => {
             'src',
             'reading',
             '__fixtures__',
+            'awsS3',
             'awsS3-mock-object.yaml',
           ),
         ),
@@ -191,6 +192,7 @@ describe('AwsS3UrlReader', () => {
             'src',
             'reading',
             '__fixtures__',
+            'awsS3',
             'awsS3-mock-object.yaml',
           ),
         ),

packages/backend-common/src/reading/__fixtures__/awsS3/awsS3-mock-object2.yaml

@@ -0,0 +1 @@
+site_name: Test2

packages/backend-common/src/reading/tree/ReadableArrayResponse.test.ts

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2021 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { ReadableArrayResponse } from './ReadableArrayResponse';
+import path from 'path';
+import { Readable } from 'stream';
+import fs from 'fs';
+
+const arr: Readable[] = [];
+const file1 = path.resolve(
+  'src',
+  'reading',
+  '__fixtures__',
+  'awsS3',
+  'awsS3-mock-object.yaml',
+);
+const file2 = path.resolve(
+  'src',
+  'reading',
+  '__fixtures__',
+  'awsS3',
+  'awsS3-mock-object2.yaml',
+);
+const stream1 = fs.createReadStream(file1);
+const stream2 = fs.createReadStream(file2);
+arr.push(stream1);
+arr.push(stream2);
+
+describe('ReadableArrayResponse', () => {
+  it('should read files', async () => {
+    const res = new ReadableArrayResponse(arr, 'etag');
+    const files = await res.files();
+
+    expect(files).toEqual([
+      {
+        path: file1,
+        content: expect.any(Function),
+      },
+      {
+        path: file2,
+        content: expect.any(Function),
+      },
+    ]);
+    const contents = await Promise.all(files.map(f => f.content()));
+    expect(contents.map(c => c.toString('utf8').trim())).toEqual([
+      'site_name: Test',
+      'site_name: Test2',
+    ]);
+  });
+});