fix: don't throw error if context is invalid

packages/helix-shared-secrets/src/secrets-wrapper.js

@@ -39,11 +39,21 @@ export function reset() {
  * @returns {Promise<object>} the secrets or {@code null}.
  */
 async function loadSecrets(ctx, opts) {
+  if (!ctx.runtime) {
+    // eslint-disable-next-line no-console
+    console.warn('local secrets not loaded. no ctx.runtime');
+    return {};
+  }
   if (ctx.runtime.name !== 'aws-lambda') {
     const error = Error(`unsupported runtime: ${ctx.runtime.name}`);
     error.statusCode = 500;
     throw error;
   }
+  if (!ctx.func) {
+    // eslint-disable-next-line no-console
+    console.warn('local secrets not loaded. no ctx.func');
+    return {};
+  }
 
   const {
     expiration = CACHE_EXPIRATION,

packages/helix-shared-secrets/test/secrets-wrapper.test.js

@@ -63,6 +63,31 @@ describe('Secrets Wrapper Unit Tests', () => {
     assert.strictEqual(resp.headers.get('x-error'), 'error fetching secrets.');
   });
 
+  it('Responds with {} for invalid context (no runtime)', async () => {
+    const main = wrap((req, ctx) => {
+      assert.deepStrictEqual(ctx.env, { });
+      return new Response(200);
+    }).with(secrets);
+    const resp = await main(new Request('http://localhost'), {
+      env: {},
+    });
+    assert.strictEqual(resp.status, 200);
+  });
+
+  it('Responds with {} for invalid context (no func)', async () => {
+    const main = wrap((req, ctx) => {
+      assert.deepStrictEqual(ctx.env, { });
+      return new Response(200);
+    }).with(secrets);
+    const resp = await main(new Request('http://localhost'), {
+      env: {},
+      runtime: {
+        name: 'aws-lambda',
+      },
+    });
+    assert.strictEqual(resp.status, 200);
+  });
+
   it('fetches secrets with default name', async () => {
     nock('https://secretsmanager.us-east-1.amazonaws.com/')
       .post('/')