cli: fix yaml transform and add test for loading yaml

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/cli/config/jestYamlTransform.js

@@ -15,6 +15,7 @@
  */
 
 const yaml = require('yaml');
+const crypto = require('crypto');
 
 function createTransformer(config) {
   const process = source => {
@@ -23,7 +24,8 @@ function createTransformer(config) {
   };
 
   const getCacheKey = sourceText => {
-    return createHash('md5')
+    return crypto
+      .createHash('md5')
       .update(sourceText)
       .update(Buffer.alloc(1))
       .update(JSON.stringify(config))

packages/cli/src/tests/yaml-fixture.yaml

@@ -0,0 +1,2 @@
+x:
+  y: 'z'

packages/cli/src/tests/yaml.test.ts

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2022 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 yaml from './yaml-fixture.yaml';
+
+describe('tests', () => {
+  it('should load yaml', () => {
+    expect(yaml).toEqual({ x: { y: 'z' } });
+  });
+});