feat(tests): add secretmanager tests

Author: CorieW

spec/index.spec.ts

@@ -67,6 +67,7 @@ describe('index', () => {
 
 import './lifecycle.spec';
 import './main.spec';
+import './secretmanager.spec';
 import './v2.spec';
 import './cloudevent/generate';
 import './app.spec';

spec/secretmanager.spec.ts

@@ -0,0 +1,43 @@
+import { expect } from 'chai';
+import { mockSecretManager } from '../src/secretManager';
+
+describe('mockSecretManager', () => {
+  let originalEnv;
+
+  before(() => {
+    // Capture the original environment variables
+    originalEnv = { ...process.env };
+  });
+
+  afterEach(() => {
+    // Reset any mutations made by the test run
+    process.env = { ...originalEnv };
+  });
+
+  it('applies each key/value pair to process.env', () => {
+    const conf = { FOO: 'bar', BAZ: 'qux' };
+
+    mockSecretManager(conf);
+
+    expect(process.env.FOO).to.equal('bar');
+    expect(process.env.BAZ).to.equal('qux');
+  });
+
+  it('overwrites an existing variable with the new value', () => {
+    process.env.EXISTING = 'old';
+    const conf = { EXISTING: 'new' };
+
+    mockSecretManager(conf);
+
+    expect(process.env.EXISTING).to.equal('new');
+  });
+
+  it('supports non-string values (coerced to string)', () => {
+    const conf: Record<string, string> = { NUM_VALUE: '123', BOOL_VALUE: 'true' };
+
+    mockSecretManager(conf);
+
+    expect(process.env.NUM_VALUE).to.equal('123');
+    expect(process.env.BOOL_VALUE).to.equal('true');
+  });
+});