message: Fix AppSyncApi tests
diff: import {
  + Capture,
  expect as expectCdk,
  countResources,
  countResourcesLike,
  haveResource,
  objectLike,
  + stringLike,
  } from "@aws-cdk/assert";
  import * as ec2 from "@aws-cdk/aws-ec2";
  import * as rds from "@aws-cdk/aws-rds";
  @@ -57,11 +59,13 @@ test("graphqlApi-props", async () => {
  XrayEnabled: false,
  })
  );
  + const schemaDef = Capture.aString();
  expectCdk(stack).to(
  haveResource("AWS::AppSync::GraphQLSchema", {
  - Definition: "# placeholder\n",
  + Definition: schemaDef.capture(),
  })
  );
  + expect(schemaDef.capturedValue.trim()).toEqual("# placeholder");
  });
  test("graphqlApi-props-schema-string", async () => {
  @@ -71,11 +75,13 @@ test("graphqlApi-props-schema-string", async () => {
  schema: "test/schema.graphql",
  },
  });
  + const schemaDef = Capture.aString();
  expectCdk(stack).to(
  haveResource("AWS::AppSync::GraphQLSchema", {
  - Definition: "# placeholder\n",
  + Definition: schemaDef.capture(),
  })
  );
  + expect(schemaDef.capturedValue.trim()).toEqual("# placeholder");
  });
  test("graphqlApi-construct", async () => {
  