Suhel0328 commented on code in PR #3508: URL: https://github.com/apache/cassandra/pull/3508#discussion_r1756184133
########## test/unit/org/apache/cassandra/tools/nodetool/GcStatsTest.java: ########## @@ -0,0 +1,195 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.cassandra.tools.nodetool; + +import com.fasterxml.jackson.databind.JsonNode; +import org.apache.cassandra.tools.NodeProbe; +import org.apache.cassandra.tools.nodetool.stats.GcStatsHolder; +import org.apache.cassandra.tools.nodetool.stats.GcStatsPrinter; +import org.apache.cassandra.tools.nodetool.stats.StatsPrinter; +import org.apache.cassandra.tools.ToolRunner; +import org.apache.cassandra.utils.JsonUtils; +import org.junit.Before; +import org.junit.Test; + +import java.io.ByteArrayOutputStream; +import java.io.PrintStream; + +import static org.assertj.core.api.Assertions.assertThat; +import static org.junit.Assert.*; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.when; + +/** + * Unit tests for GcStats command. + */ +public class GcStatsTest +{ + private NodeProbe nodeProbe; + private ByteArrayOutputStream outContent; + private PrintStream outStream; + + @Before + public void setUp() throws Exception + { + nodeProbe = mock(NodeProbe.class); + + // Set up mock values for getAndResetGCStats method + double[] gcStats = {500, 100, 245, 300, 100, 10, 1024}; + when(nodeProbe.getAndResetGCStats()).thenReturn(gcStats); + + // Capture the output printed to the console + outContent = new ByteArrayOutputStream(); + outStream = new PrintStream(outContent); + } + + @Test + @SuppressWarnings("SingleCharacterStringConcatenation") + public void testMaybeChangeDocs() + { + // If you added, modified options or help, please update docs if necessary + ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("help", "gcstats"); + tool.assertOnCleanExit(); + + String help = "NAME\n" + + " nodetool gcstats - Print GC Statistics\n" + + "\n" + + "SYNOPSIS\n" + + " nodetool [(-h <host> | --host <host>)] [(-p <port> | --port <port>)]\n" + + " [(-pp | --print-port)] [(-pw <password> | --password <password>)]\n" + + " [(-pwf <passwordFilePath> | --password-file <passwordFilePath>)]\n" + + " [(-u <username> | --username <username>)] gcstats\n" + + " [(-F <format> | --format <format>)]\n" + + "\n" + + "OPTIONS\n" + + " -F <format>, --format <format>\n" + + " Output format (json)\n" + + "\n" + + " -h <host>, --host <host>\n" + + " Node hostname or ip address\n" + + "\n" + + " -p <port>, --port <port>\n" + + " Remote jmx agent port number\n" + + "\n" + + " -pp, --print-port\n" + + " Operate in 4.0 mode with hosts disambiguated by port number\n" + + "\n" + + " -pw <password>, --password <password>\n" + + " Remote jmx agent password\n" + + "\n" + + " -pwf <passwordFilePath>, --password-file <passwordFilePath>\n" + + " Path to the JMX password file\n" + + "\n" + + " -u <username>, --username <username>\n" + + " Remote jmx agent username\n" + + "\n"; + + assertThat(tool.getStdout().trim()).isEqualTo(help.trim()); + } + + @Test + public void testDefaultGcStatsOutput() throws Exception + { + // Initialize GcStats with the mock NodeProbe + GcStatsHolder gcStatsHolder = new GcStatsHolder(nodeProbe); + StatsPrinter defaultPrinter = new GcStatsPrinter.DefaultPrinter(); + + // Print using the default format + defaultPrinter.print(gcStatsHolder, outStream); + + // Verify that output contains the expected headers and values using assertThat + String output = outContent.toString(); + + assertThat(output) + .contains("Interval (ms)") + .contains("Max GC Elapsed (ms)") + .contains("Total GC Elapsed (ms)") + .contains("Stdev GC Elapsed (ms)") + .contains("GC Reclaimed (MB)") + .contains("Collections") + .contains("Direct Memory Bytes"); + + // Verify that NaN values are handled correctly, or actual values appear + if (output.contains("NaN")) + { + assertThat(output).contains("NaN"); + } + else + { + assertThat(output).contains("500") // Interval (ms) + .contains("100") // Max GC Elapsed (ms) + .contains("245") // Total GC Elapsed (ms) + .contains("300") // Stdev GC Elapsed (ms) + .contains("1024"); // Direct Memory Bytes + } + } + + @Test + public void testJsonGcStatsOutput() throws Exception + { + // Initialize GcStats with the mock NodeProbe + GcStatsHolder gcStatsHolder = new GcStatsHolder(nodeProbe); + StatsPrinter jsonPrinter = GcStatsPrinter.from("json"); + + // Print using the JSON format + jsonPrinter.print(gcStatsHolder, outStream); + + // Verify JSON output structure + String jsonOutput = outContent.toString(); + + // Parse JSON output using JsonUtils + JsonNode rootNode = JsonUtils.JSON_OBJECT_MAPPER.readTree(jsonOutput); + + // Check if important fields are present in the JSON output + assertThat(rootNode.has("interval_ms")).isTrue(); + assertThat(rootNode.has("max_gc_elapsed_ms")).isTrue(); + assertThat(rootNode.has("total_gc_elapsed_ms")).isTrue(); + assertThat(rootNode.has("stdev_gc_elapsed_ms")).isTrue(); + assertThat(rootNode.has("gc_reclaimed_mb")).isTrue(); + assertThat(rootNode.has("collections")).isTrue(); + assertThat(rootNode.has("direct_memory_bytes")).isTrue(); + + // Verify values in JSON output + assertThat(rootNode.get("interval_ms").asInt()).isEqualTo(500); + assertThat(rootNode.get("max_gc_elapsed_ms").asInt()).isEqualTo(100); + assertThat(rootNode.get("total_gc_elapsed_ms").asInt()).isEqualTo(245); + assertThat(rootNode.get("direct_memory_bytes").asInt()).isEqualTo(1024); + } + + @Test + public void testInvalidFormatOption() throws Exception + { + GcStats gcStats = new GcStats(); + + // Use reflection to set the private field outputFormat to an invalid value + java.lang.reflect.Field outputFormatField = GcStats.class.getDeclaredField("outputFormat"); + outputFormatField.setAccessible(true); + outputFormatField.set(gcStats, "invalid_format"); + + try + { + gcStats.execute(nodeProbe); + fail("Expected IllegalArgumentException for invalid format"); + } + catch (IllegalArgumentException e) + { + assertEquals("arguments for -F are json only.", e.getMessage()); + } + } Review Comment: Thank you for the feedback! We already have tests for gcstats covering help output, JSON output, YAML output, and an invalid format scenario. Would you like me to update the test method `testInvalidFormatOption()` to use invokeNodetool instead and remove the use of assertThatExceptionOfType, or are you suggesting adding a different test case? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
