[Schema Registry] Add a whitespace in schema test case

sdk/schemaregistry/schema-registry/test/schemaRegistry.spec.ts

@@ -206,4 +206,52 @@ describe("SchemaRegistryClient", function() {
     assertIsValidSchemaId(foundIdSecondCall);
     assert.equal(foundIdSecondCall?.id, registered.id);
   });
+
+  it("schema with whitespace", async () => {
+    const schema2 = {
+      name: "azsdk_js_test2",
+      group: testEnv.SCHEMA_REGISTRY_GROUP,
+      serializationType: "avro",
+      content:
+        "{\n" +
+        '  "type": "record",\n' +
+        '  "name": "Test",\n' +
+        '  "fields": [{ "name": "X", "type": { "type": "string" } }]\n' +
+        "}\n"
+    };
+    // content that is going to the service has whitespaces
+    const registered = await client.registerSchema(schema2, options);
+    assertIsValidSchemaId(registered);
+
+    const foundSchema = await client.getSchemaById(registered.id, {
+      onResponse: () => {
+        assert.fail("Unexpected call to the service");
+      }
+    });
+    assertIsValidSchemaId(foundSchema);
+    assert.equal(foundSchema.content, schema2.content);
+
+    let ran = false;
+    const foundId = await client.getSchemaId(
+      {
+        // content that comes from the service does not have whitespaces
+        content: foundSchema.content,
+        group: schema2.group,
+        name: schema2.name,
+        serializationType: foundSchema.serializationType
+      },
+      {
+        onResponse: () => {
+          ran = true;
+        }
+      }
+    );
+    // the schema comes from the service normalized so that its content has no whitespace
+    // which is different from the original schema that was registered first and lives
+    // in the cache. There is a trade-off between the perf hit for doing client-side
+    // normalization and the perf hit for doing an extra call to the service for the
+    // normalized one.
+    assert.isTrue(ran, "Expected call to the service did not happen");
+    assertIsValidSchemaId(foundId);
+  });
 });