fix: ignore function hash in regression test as the hash changes with…

… updated dependencies that affect the bundled lambda code

We can safely ignore this hash as we don't need to test whether the bundler works, we only care about the structure of the terraform output being correct

test/__snapshots__/test-against-regression.test.ts.snap

@@ -178,12 +178,12 @@ exports[`Tests against regression of synth output has no change in PostsStack Co
             "DYNAMODB_TABLE_NAME": "\${aws_dynamodb_table.posts_storage_table_50F8EECB.name}"
           }
         },
-        "filename": "assets/posts_api_code_lambda-asset_7F9E9FED/8709451AE9543AF31FCAFB7AE82D206E/archive.zip",
+        "filename": "assets/posts_api_code_lambda-asset_7F9E9FED/DUMMY_HASH/archive.zip",
         "function_name": "sls-example-posts-api-developmentregression-test",
         "handler": "index.handler",
         "role": "\${aws_iam_role.posts_api_lambda-exec_B42627E0.arn}",
         "runtime": "nodejs14.x",
-        "source_code_hash": "8709451AE9543AF31FCAFB7AE82D206E"
+        "source_code_hash": "DUMMY_HASH"
       }
     },
     "aws_lambda_permission": {

test/test-against-regression.test.ts

@@ -27,6 +27,13 @@ describe("Tests against regression of synth output", () => {
         });
         const stackSynth = JSON.parse(Testing.synth(stack));
         delete stackSynth["terraform"]
+
+        // this hash changes whenever dependencies are updated that affect the compiled lambda function
+        const actualHash = stackSynth.resource.aws_lambda_function.posts_api_7D5242CA.source_code_hash;
+        stackSynth.resource.aws_lambda_function.posts_api_7D5242CA.source_code_hash = "DUMMY_HASH";
+        stackSynth.resource.aws_lambda_function.posts_api_7D5242CA.filename =
+            stackSynth.resource.aws_lambda_function.posts_api_7D5242CA.filename.replace(actualHash, "DUMMY_HASH");
+
         expect(JSON.stringify(stackSynth, null, 2)).toMatchSnapshot();
     });
 });