[GitHub] [pulsar] lifepuzzlefun commented on a diff in pull request #19929: [fix][client] Cache empty schema version in ProducerImpl schemaCache.

["lifepuzzlefun (via GitHub)" <gi...@apache.org>]

lifepuzzlefun commented on code in PR #19929:
URL: https://github.com/apache/pulsar/pull/19929#discussion_r1154093897


##########
pulsar-broker/src/test/java/org/apache/pulsar/client/impl/ProducerEmptySchemaCacheTest.java:
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@@ -0,0 +1,70 @@
+package org.apache.pulsar.client.impl;
+
+import lombok.Cleanup;
+import org.apache.pulsar.client.api.MockBrokerService;
+import org.apache.pulsar.client.api.Producer;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.Schema;
+import org.apache.pulsar.common.protocol.Commands;
+import org.apache.pulsar.common.protocol.schema.SchemaVersion;
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.testng.Assert.assertEquals;
+
+public class ProducerEmptySchemaCacheTest {
+
+    MockBrokerService mockBrokerService;
+
+    @BeforeClass(alwaysRun = true)
+    public void setup() {
+        mockBrokerService = new MockBrokerService();
+        mockBrokerService.start();
+    }
+
+    @AfterClass(alwaysRun = true)
+    public void teardown() {
+        if (mockBrokerService != null) {

Review Comment:
   just copy from other ut



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