Add new tests regarding generate features.

src/test/groovy/io/openliberty/tools/gradle/BaseDevTest.groovy

@@ -0,0 +1,265 @@
+/*
+ * (C) Copyright IBM Corporation 2022.
+ *
+ * Licensed 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 io.openliberty.tools.gradle;
+
+import static org.junit.Assert.*;
+
+import java.io.BufferedWriter;
+import org.apache.commons.io.FileUtils;
+import java.io.File;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+class BaseDevTest extends AbstractIntegrationTest {
+    static final String projectName = "basic-dev-project";
+
+    static File resourceDir = new File("build/resources/test/dev-test/" + projectName);
+    static File buildDir = new File(integTestDir, "dev-test/" + projectName + System.currentTimeMillis()); // append timestamp in case previous build was not deleted
+    static String buildFilename = "build.gradle";
+
+    static File targetDir;
+    static BufferedWriter writer;
+    // ProcessBuilder.redirectOutput() and .redirectError() are not threadsafe.
+    // Dev mode sends the Liberty output and error output to stderr while
+    // regular dev mode messages are sent to stdout. If you try to redirect
+    // both streams into one file they will both be corrupted and tests 
+    // will fail. When you verify a log message exists you must specify
+    // the correct file. Use logFile for "compilation was successful"
+    // and errFile for "compilation had errors" or Liberty messages like 
+    // "CWWKF0011I" or "The server installed the following features".
+    static File logFile = new File(buildDir, "output.log");
+    static File errFile = new File(buildDir, "stderr.log");
+    static Process process;
+
+    protected static void runDevMode() throws IOException, InterruptedException, FileNotFoundException {
+        System.out.println("Starting dev mode...");
+        startProcess(null, true);
+        System.out.println("Started dev mode");
+    }
+
+    private static void startProcess(String params, boolean isDevMode) throws IOException, InterruptedException, FileNotFoundException {
+        // get gradle wrapper from project root dir
+        File gradlew;
+        String os = System.getProperty("os.name");
+        if (os != null && os.toLowerCase().startsWith("windows")) {
+            gradlew = new File("gradlew.bat")
+        } else {
+            gradlew = new File("gradlew")
+        }
+
+        StringBuilder command = new StringBuilder(gradlew.getAbsolutePath() + " libertyDev");
+        if (params != null) {
+            command.append(" " + params);
+        }
+        System.out.println("Running command: " + command.toString());
+        ProcessBuilder builder = buildProcess(command.toString());
+
+        builder.redirectOutput(logFile);
+        builder.redirectError(errFile);
+        process = builder.start();
+        assertTrue(process.isAlive());
+
+        OutputStream stdin = process.getOutputStream();
+
+        writer = new BufferedWriter(new OutputStreamWriter(stdin));
+
+        // check that the server has started
+        assertTrue(verifyLogMessage(120000, "CWWKF0011I", errFile));
+        if (isDevMode) {
+            assertTrue(verifyLogMessage(60000, "Liberty is running in dev mode."));
+        }
+
+        // verify that the target directory was created
+        targetDir = new File(buildDir, "build");
+        assertTrue(targetDir.exists());
+    }
+
+    protected static ProcessBuilder buildProcess(String processCommand) {
+        ProcessBuilder builder = new ProcessBuilder();
+        builder.directory(buildDir);
+
+        String os = System.getProperty("os.name");
+        if (os != null && os.toLowerCase().startsWith("windows")) {
+            builder.command("CMD", "/C", processCommand);
+        } else {
+            builder.command("bash", "-c", processCommand);
+        }
+        return builder;
+    }
+
+    protected static boolean verifyLogMessage(int timeout, String message)
+            throws InterruptedException, FileNotFoundException {
+        verifyLogMessage(timeout, message, logFile)
+    }
+
+    protected static boolean verifyLogMessage(int timeout, String message, File file)
+            throws InterruptedException, FileNotFoundException {
+        int waited = 0;
+        int sleep = 100;
+        while (waited <= timeout) {
+            if (readFile(message, file)) {
+                Thread.sleep(1000);
+                return true;
+            }
+            Thread.sleep(sleep);
+            waited += sleep;
+        }
+        return false;
+    }
+
+    protected static boolean verifyLogMessage(int timeout, String message, int occurrences)
+            throws InterruptedException, FileNotFoundException {
+        verifyLogMessage(timeout, message, logFile, occurrences)
+    }
+
+    protected static boolean verifyLogMessage(int timeout, String message, File file, int occurrences)
+            throws InterruptedException, FileNotFoundException {
+        int waited = 0;
+        int sleep = 10;
+        while (waited <= timeout) {
+            Thread.sleep(sleep);
+            waited += sleep;
+            if (countOccurrences(message, file) == occurrences) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    protected static boolean verifyFileExists(File file, int timeout)
+            throws InterruptedException {
+        int waited = 0;
+        int sleep = 100;
+        while (waited <= timeout) {
+            if (file.exists()) {
+                return true;
+            }
+            Thread.sleep(sleep);
+            waited += sleep;
+        }
+        return false;
+    }
+
+    protected static boolean verifyFileDoesNotExist(File file, int timeout)
+            throws InterruptedException {
+        int waited = 0;
+        int sleep = 100;
+        while (waited <= timeout) {
+            Thread.sleep(sleep);
+            waited += sleep;
+            if (!file.exists()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static boolean readFile(String str, File file) throws FileNotFoundException {
+        Scanner scanner = new Scanner(file);
+        try {
+            while (scanner.hasNextLine()) {
+                String line = scanner.nextLine();
+                if (line.contains(str)) {
+                    return true;
+                }
+            }
+        } finally {
+            scanner.close();
+        }
+        return false;
+    }
+
+    /**
+     * Retrieve the contents of a file, store it in a string and wrap it with
+     * some headers and footers that make it easy to navigate when the contents
+     * are saved in the output log.
+     */
+    protected static String getContents(File f, String hdr) {
+        Path path = f.toPath();
+        Charset charset = StandardCharsets.UTF_8;
+        String s = new String(Files.readAllBytes(path), charset);
+        String content = "\n" + hdr + " v(" + s.length() + ")\n"
+        content += s
+        content +=  "\n" + hdr + " ^(" + s.length() + ")\n"
+        return content
+    }
+
+    /**
+     * Read a file, replace occurrences of 'str' with 'replacement' and write the file.
+     */
+    protected static void replaceString(String str, String replacement, File file) throws IOException {
+        Path path = file.toPath();
+        Charset charset = StandardCharsets.UTF_8;
+
+        String content = new String(Files.readAllBytes(path), charset);
+
+        content = content.replaceAll(str, replacement);
+        Files.write(path, content.getBytes(charset));
+    }
+
+    /**
+     * Count number of lines that contain the given string
+     */
+    protected static int countOccurrences(String str, File file) throws FileNotFoundException, IOException {
+        int occurrences = 0;
+        BufferedReader br = new BufferedReader(new FileReader(file));
+        String line = br.readLine();
+        try {
+            while (line != null) {
+                if (line.contains(str)) {
+                    occurrences++;
+                }
+                line = br.readLine();
+            }
+        } finally {
+            br.close();
+        }
+        return occurrences;
+    }
+
+    protected static void cleanUpAfterClass(boolean isDevMode) throws Exception {
+        stopProcess(isDevMode);
+        if (buildDir != null && buildDir.exists()) {
+            FileUtils.deleteDirectory(buildDir);
+        }
+        if (logFile != null && logFile.exists()) {
+            assertTrue(logFile.delete());
+        }
+        if (errFile != null && errFile.exists()) {
+            assertTrue(errFile.delete());
+        }
+    }
+
+    private static void stopProcess(boolean isDevMode) throws IOException, InterruptedException, FileNotFoundException {
+        // shut down dev mode
+        if (writer != null) {
+            int serverStoppedOccurrences = countOccurrences("CWWKE0036I", logFile);
+            if (isDevMode) {
+                writer.write("exit"); // trigger dev mode to shut down
+            } else {
+                process.destroy(); // stop run
+            }
+            writer.flush();
+            writer.close();
+
+            // test that dev mode has stopped running
+            assertTrue(verifyLogMessage(100000, "CWWKE0036I", errFile, ++serverStoppedOccurrences));
+            Thread.sleep(5000); // wait 5s to ensure java process has stopped
+        }
+    }
+}