test: customizable readme contents

Author: trivikr

codegen/smithy-aws-typescript-codegen/src/test/java/software/amazon/smithy/aws/typescript/codegen/AwsPackageFixturesGeneratorIntegrationTest.java

@@ -1,5 +1,8 @@
 package software.amazon.smithy.aws.typescript.codegen;
 
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsString;
+
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import software.amazon.smithy.build.MockManifest;
@@ -33,5 +36,12 @@ public void expandsPackageFixtureFiles() {
         Assertions.assertTrue(manifest.hasFile(".gitignore"));
         Assertions.assertTrue(manifest.hasFile(".npmignore"));
         Assertions.assertTrue(manifest.hasFile("README.md"));
+
+        String readme = manifest.getFileString("README.md").get();
+        assertThat(readme, containsString("AWS SDK for JavaScript NotSame Client"));    // Description
+        assertThat(readme, containsString("`NotSameClient`"));  // Modular Client name
+        assertThat(readme, containsString("`GetFooCommand`"));  // Command name
+        assertThat(readme, containsString("AWS.NotSame"));      // v2 compatible client name
+        assertThat(readme, containsString("client.getFoo"));    // v2 compatible operation name                        
     }
 }