davsclaus commented on code in PR #28799: URL: https://github.com/apache/camel/pull/28799#discussion_r4436479349
########## dsl/camel-jbang/camel-jbang-core/src/test/java/org/apache/camel/dsl/jbang/core/commands/CliHelpGoldenTest.java: ########## @@ -0,0 +1,246 @@ +/* + * 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.camel.dsl.jbang.core.commands; + +import java.io.ByteArrayOutputStream; +import java.io.PrintStream; +import java.nio.charset.StandardCharsets; +import java.nio.file.Files; +import java.nio.file.Path; +import java.util.ArrayList; +import java.util.Collections; +import java.util.IdentityHashMap; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.Set; +import java.util.TreeMap; + +import org.apache.camel.catalog.DefaultCamelCatalog; +import org.apache.camel.dsl.jbang.core.common.EnvironmentHelper; +import org.apache.camel.dsl.jbang.run.common.HawtioVersion; +import org.apache.camel.dsl.jbang.run.common.RuntimeType; +import org.apache.camel.dsl.jbang.run.common.StringPrinter; +import org.apache.camel.util.FileUtil; +import org.junit.jupiter.api.AfterEach; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Test; +import picocli.CommandLine; + +import static org.assertj.core.api.Assertions.assertThat; +import static org.junit.jupiter.api.Assumptions.assumeFalse; + +/** + * Guards what the CLI prints for {@code --help} and for a command line that is wrong, so a change of the command line + * parser (such as the port from picocli to aesh, CAMEL-23810) shows every difference to the user. + * <p/> + * The expected output is in src/test/resources/golden/cli-help.txt: the help of {@code camel} and of every command + * (without colors, at the width of 80 columns that the CLI uses), and for each wrong command line its exit code, stderr + * and stdout. The directories of the machine and the versions that the build sets are written as names, so the file is + * the same on every machine and after an upgrade. + * <p/> + * Run with -Dcamel.golden.update=true to write the file again, and check the difference before committing it. + */ +class CliHelpGoldenTest extends CamelCommandBaseTestSupport { + + private static final Path GOLDEN = Path.of("src/test/resources/golden/cli-help.txt"); + private static final boolean UPDATE = Boolean.getBoolean("camel.golden.update"); + + // wrong command lines, and what the CLI tells about them + private static final List<List<String>> ERRORS = List.of( + List.of("no-such-command"), + List.of("run", "--no-such-option"), + List.of("get", "route", "--sort"), + List.of("version", "list", "--from-date=yesterday"), + List.of("catalog", "component", "--sort=nope", "--json"), + List.of("ps", "--no-such-option", "--json"), + List.of("config", "get", "no-such-key"), + List.of("stop", "no-such-integration"), + List.of("run", "no-such-file.yaml")); + + private final Map<String, String> camelProperties = new TreeMap<>(); + + @BeforeEach + void clearCamelSystemProperties() throws Exception { + // the camel system properties of the JVM, which the commands read: the help is written without them + for (String key : System.getProperties().stringPropertyNames()) { + if (key.startsWith("camel.") && !key.equals("camel.golden.update")) { + camelProperties.put(key, System.getProperty(key)); + System.clearProperty(key); + } + } + useTestHomeDir(); + } + + @AfterEach + void restoreCamelSystemProperties() { + camelProperties.forEach(System::setProperty); + } + + @Test + void theHelpAndTheErrorsAreAsBefore() throws Exception { + // the default of --logging-color of camel run comes from the environment (FORCE_COLOR), and is off in CI and in + // the tests, which have no console + assumeFalse(EnvironmentHelper.isColorEnabled(), "the colors of the logging are on (FORCE_COLOR)"); + Map<String, String> actual = sections(); + if (UPDATE) { + StringBuilder sb = new StringBuilder(); + sb.append("# What the Camel CLI prints for --help and for a wrong command line, see CliHelpGoldenTest.\n"); + sb.append("# Written with -Dcamel.golden.update=true.\n"); + actual.forEach((title, text) -> sb.append('\n').append(title).append('\n').append(text)); + Files.writeString(GOLDEN, sb.toString(), StandardCharsets.UTF_8); + return; + } + + Map<String, String> expected = read(Files.readAllLines(GOLDEN, StandardCharsets.UTF_8)); + List<String> differences = new ArrayList<>(); + for (String title : union(expected.keySet(), actual.keySet())) { + String want = expected.get(title); + String got = actual.get(title); + if (!Objects.equals(want, got)) { + differences.add(title + "\n--- expected\n" + want + "--- actual\n" + got); + } + } + assertThat(differences) + .as("the help and errors that differ from %s (run with -Dcamel.golden.update=true to update)", GOLDEN) + .isEmpty(); + } + + // the sections of the file by their title line: the help of each command, then each wrong command line + private Map<String, String> sections() { + Map<String, String> answer = new LinkedHashMap<>(); + CommandLine root = new CamelJBangMain().withPrinter(printer).createCommandLine(null); + answer.put("== camel --help", normalize(root.getUsageMessage(CommandLine.Help.Ansi.OFF))); + help(root, "camel", answer, Collections.newSetFromMap(new IdentityHashMap<>())); + for (List<String> args : ERRORS) { + answer.put("== camel " + String.join(" ", args), normalize(error(args))); + } + return answer; + } + + // the help of the sub-commands, in the order of their names + private static void help(CommandLine parent, String path, Map<String, String> answer, Set<CommandLine> seen) { + Map<String, CommandLine> subcommands = new TreeMap<>(); + parent.getSubcommands().forEach((name, sub) -> { + // a command is in the map under the name it was added with, and after that under its aliases + if (seen.add(sub)) { + subcommands.put(name, sub); + } + }); + subcommands.forEach((name, sub) -> { + String subPath = path + " " + name; + answer.put("== " + subPath + " --help", normalize(sub.getUsageMessage(CommandLine.Help.Ansi.OFF))); + help(sub, subPath, answer, seen); + }); + } + + // runs the command line as the CLI does, and gives its exit code, stderr and stdout: from the printer of the CLI, + // and from System.err and System.out, where picocli prints a usage error + private String error(List<String> args) { + printer = new StringPrinter(); + TestMain main = new TestMain(); + main.withPrinter(printer); + ByteArrayOutputStream err = new ByteArrayOutputStream(); + ByteArrayOutputStream out = new ByteArrayOutputStream(); + PrintStream oldErr = System.err; + PrintStream oldOut = System.out; + String oldAnsi = System.getProperty("picocli.ansi"); + System.setErr(new PrintStream(err, true, StandardCharsets.UTF_8)); + System.setOut(new PrintStream(out, true, StandardCharsets.UTF_8)); + System.setProperty("picocli.ansi", "false"); + try { + main.execute(args.toArray(new String[0])); + } finally { + System.setErr(oldErr); + System.setOut(oldOut); + if (oldAnsi != null) { + System.setProperty("picocli.ansi", oldAnsi); + } else { + System.clearProperty("picocli.ansi"); + } + } + StringBuilder sb = new StringBuilder(); + sb.append("exit: ").append(main.exitCode).append('\n'); + appendStream(sb, "stderr", printer.getStderr() + err.toString(StandardCharsets.UTF_8)); + appendStream(sb, "stdout", printer.getStdout() + out.toString(StandardCharsets.UTF_8)); + return sb.toString(); + } + + private static void appendStream(StringBuilder sb, String name, String text) { + if (text == null || text.isBlank()) { + return; + } + sb.append(name).append(":\n"); + for (String line : text.strip().split("\\R")) { + sb.append(" ").append(line).append('\n'); + } + } + + // the directories of the machine and the versions that the build sets as names, and no trailing spaces + private static String normalize(String text) { + String home = FileUtil.normalizePath(System.getProperty("user.home")); + String cwd = FileUtil.normalizePath(Path.of("").toAbsolutePath().toString()); + String camelVersion = new DefaultCamelCatalog().getCatalogVersion(); Review Comment: Done in eda4597580ad: the version is read once, in a `static final` field. _Claude Code on behalf of davsclaus (Claus Ibsen)_ -- This is an automated message from the Apache Git Service. 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