Test demonstrating failure

packages/@aws-cdk/aws-lambda-python/test/integ.function.arm64.ts

@@ -0,0 +1,53 @@
+import * as path from 'path';
+import { Architecture, Runtime } from '@aws-cdk/aws-lambda';
+import { App, CfnOutput, Stack, StackProps } from '@aws-cdk/core';
+import { IntegTest, ExpectedResult } from '@aws-cdk/integ-tests';
+import { Construct } from 'constructs';
+import * as lambda from '../lib';
+
+/*
+ * Stack verification steps:
+ * * aws lambda invoke --function-name <deployed fn name> --invocation-type Event --payload '"OK"' response.json
+ */
+
+class TestStack extends Stack {
+  public readonly functionName: string;
+  constructor(scope: Construct, id: string, props?: StackProps) {
+    super(scope, id, props);
+
+    const layer = new lambda.PythonLayerVersion(this, 'Layer', {
+      entry: path.join(__dirname, 'lambda-handler-arm64/layer'),
+      compatibleRuntimes: [Runtime.PYTHON_3_9],
+      compatibleArchitectures: [Architecture.ARM_64],
+    });
+
+    const fn = new lambda.PythonFunction(this, 'Handler', {
+      entry: path.join(__dirname, 'lambda-handler-arm64/handler'),
+      runtime: Runtime.PYTHON_3_9,
+      architecture: Architecture.ARM_64,
+      layers: [layer],
+    });
+    this.functionName = fn.functionName;
+
+    new CfnOutput(this, 'FunctionArn', {
+      value: fn.functionArn,
+    });
+  }
+}
+
+const app = new App();
+const testCase = new TestStack(app, 'integ-lambda-python-arm64');
+const integ = new IntegTest(app, 'lambda-python-arm64', {
+  testCases: [testCase],
+  stackUpdateWorkflow: false,
+});
+
+const invoke = integ.assertions.invokeFunction({
+  functionName: testCase.functionName,
+});
+
+invoke.expect(ExpectedResult.objectLike({
+  Payload: '200',
+}));
+
+app.synth();

packages/@aws-cdk/aws-lambda-python/test/lambda-handler-arm64/handler/index.py

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+from itertools import count
+from flupy import flu
+
+def handler(event, context):
+  # Example flupy processing an infinite sequence
+  pipeline = (
+    flu(count())
+    .map(lambda x: x**2)
+    .filter(lambda x: x % 517 == 0)
+    .chunk(5)
+    .take(3)
+  )
+  for item in pipeline:
+    print(item)
+
+  return 200

packages/@aws-cdk/aws-lambda-python/test/lambda-handler-arm64/layer/requirements.txt

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+# Lock versions of pip packages
+typing-extensions==4.4.0
+# Used by this lambda
+flupy==1.1.9