elharo commented on code in PR #60:
URL: https://github.com/apache/maven-clean-plugin/pull/60#discussion_r1834433249


##########
src/test/java/org/apache/maven/plugins/clean/CleanerTest.java:
##########
@@ -0,0 +1,173 @@
+/*
+ * 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.maven.plugins.clean;
+
+import java.io.IOException;
+import java.nio.file.AccessDeniedException;
+import java.nio.file.DirectoryNotEmptyException;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Set;
+
+import org.apache.maven.plugin.logging.Log;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InOrder;
+
+import static java.nio.file.Files.createDirectory;
+import static java.nio.file.Files.createFile;
+import static java.nio.file.Files.exists;
+import static java.nio.file.Files.getPosixFilePermissions;
+import static java.nio.file.Files.setPosixFilePermissions;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+class CleanerTest {
+
+    private static final boolean POSIX_COMPLIANT =
+            
FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
+
+    private final Log log = mock();
+
+    @Test
+    void deleteSucceedsDeeply(@TempDir Path tempDir) throws Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        final Path file = createFile(basedir.resolve("file"));
+        final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+        cleaner.delete(basedir.toFile(), null, false, true, false);
+        assertFalse(exists(basedir));
+        assertFalse(exists(file));
+    }
+
+    @Test
+    void deleteFailsWithoutRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        when(log.isWarnEnabled()).thenReturn(true);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(rw_rw_r__);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            final IOException exception =
+                    assertThrows(IOException.class, () -> 
cleaner.delete(basedir.toFile(), null, false, true, false));
+            verify(log, never()).warn(any(CharSequence.class), 
any(Throwable.class));
+            assertEquals("Failed to delete " + basedir, 
exception.getMessage());
+            final DirectoryNotEmptyException cause =
+                    assertInstanceOf(DirectoryNotEmptyException.class, 
exception.getCause());
+            assertEquals(basedir.toString(), cause.getMessage());
+        } finally {
+            // Allow the tempDir to be cleared by the @TempDir extension.
+            setPosixFilePermissions(basedir, initialPermissions);
+        }
+    }
+
+    @Test
+    void deleteFailsAfterRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(rw_rw_r__);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            final IOException exception =
+                    assertThrows(IOException.class, () -> 
cleaner.delete(basedir.toFile(), null, false, true, true));
+            assertEquals("Failed to delete " + basedir, 
exception.getMessage());
+            final DirectoryNotEmptyException cause =
+                    assertInstanceOf(DirectoryNotEmptyException.class, 
exception.getCause());
+            assertEquals(basedir.toString(), cause.getMessage());
+        } finally {
+            // Allow the tempDir to be cleared by the @TempDir extension.
+            setPosixFilePermissions(basedir, initialPermissions);
+        }
+    }
+
+    @Test
+    void deleteLogsWarningWithoutRetryWhenNoPermission(@TempDir Path tempDir) 
throws Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        when(log.isWarnEnabled()).thenReturn(true);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        final Path file = createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        final String r_xr_xr_x = rwxrwxr_x.replace('w', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(r_xr_xr_x);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            assertDoesNotThrow(() -> cleaner.delete(basedir.toFile(), null, 
false, false, false));
+            verify(log, times(2)).warn(any(CharSequence.class), 
any(Throwable.class));
+            InOrder inOrder = inOrder(log);
+            ArgumentCaptor<AccessDeniedException> cause1 = 
ArgumentCaptor.forClass(AccessDeniedException.class);
+            inOrder.verify(log).warn(eq("Failed to delete " + file), 
cause1.capture());
+            assertEquals(file.toString(), cause1.getValue().getMessage());
+            ArgumentCaptor<DirectoryNotEmptyException> cause2 =
+                    ArgumentCaptor.forClass(DirectoryNotEmptyException.class);
+            inOrder.verify(log).warn(eq("Failed to delete " + basedir), 
cause2.capture());
+            assertEquals(basedir.toString(), cause2.getValue().getMessage());
+        } finally {
+            setPosixFilePermissions(basedir, initialPermissions);

Review Comment:
   So I don't think these are what I would call "persistent'. Either way, let's 
start with the assumption you don't need this. Take out the finally block and 
see if everything still passes.



##########
src/test/java/org/apache/maven/plugins/clean/CleanerTest.java:
##########
@@ -0,0 +1,173 @@
+/*
+ * 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.maven.plugins.clean;
+
+import java.io.IOException;
+import java.nio.file.AccessDeniedException;
+import java.nio.file.DirectoryNotEmptyException;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Set;
+
+import org.apache.maven.plugin.logging.Log;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InOrder;
+
+import static java.nio.file.Files.createDirectory;
+import static java.nio.file.Files.createFile;
+import static java.nio.file.Files.exists;
+import static java.nio.file.Files.getPosixFilePermissions;
+import static java.nio.file.Files.setPosixFilePermissions;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+class CleanerTest {
+
+    private static final boolean POSIX_COMPLIANT =
+            
FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
+
+    private final Log log = mock();
+
+    @Test
+    void deleteSucceedsDeeply(@TempDir Path tempDir) throws Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        final Path file = createFile(basedir.resolve("file"));
+        final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+        cleaner.delete(basedir.toFile(), null, false, true, false);
+        assertFalse(exists(basedir));
+        assertFalse(exists(file));
+    }
+
+    @Test
+    void deleteFailsWithoutRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        when(log.isWarnEnabled()).thenReturn(true);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(rw_rw_r__);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            final IOException exception =
+                    assertThrows(IOException.class, () -> 
cleaner.delete(basedir.toFile(), null, false, true, false));
+            verify(log, never()).warn(any(CharSequence.class), 
any(Throwable.class));
+            assertEquals("Failed to delete " + basedir, 
exception.getMessage());
+            final DirectoryNotEmptyException cause =
+                    assertInstanceOf(DirectoryNotEmptyException.class, 
exception.getCause());
+            assertEquals(basedir.toString(), cause.getMessage());
+        } finally {
+            // Allow the tempDir to be cleared by the @TempDir extension.
+            setPosixFilePermissions(basedir, initialPermissions);
+        }
+    }
+
+    @Test
+    void deleteFailsAfterRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(rw_rw_r__);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            final IOException exception =
+                    assertThrows(IOException.class, () -> 
cleaner.delete(basedir.toFile(), null, false, true, true));
+            assertEquals("Failed to delete " + basedir, 
exception.getMessage());
+            final DirectoryNotEmptyException cause =
+                    assertInstanceOf(DirectoryNotEmptyException.class, 
exception.getCause());
+            assertEquals(basedir.toString(), cause.getMessage());
+        } finally {
+            // Allow the tempDir to be cleared by the @TempDir extension.

Review Comment:
   This might be what I'm missing. The annotation doesn't work with the 
permissions you set?



##########
src/test/java/org/apache/maven/plugins/clean/CleanerTest.java:
##########
@@ -0,0 +1,173 @@
+/*
+ * 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.maven.plugins.clean;
+
+import java.io.IOException;
+import java.nio.file.AccessDeniedException;
+import java.nio.file.DirectoryNotEmptyException;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Set;
+
+import org.apache.maven.plugin.logging.Log;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InOrder;
+
+import static java.nio.file.Files.createDirectory;
+import static java.nio.file.Files.createFile;
+import static java.nio.file.Files.exists;
+import static java.nio.file.Files.getPosixFilePermissions;
+import static java.nio.file.Files.setPosixFilePermissions;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+class CleanerTest {
+
+    private static final boolean POSIX_COMPLIANT =
+            
FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
+
+    private final Log log = mock();
+
+    @Test
+    void deleteSucceedsDeeply(@TempDir Path tempDir) throws Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        final Path file = createFile(basedir.resolve("file"));
+        final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+        cleaner.delete(basedir.toFile(), null, false, true, false);
+        assertFalse(exists(basedir));
+        assertFalse(exists(file));
+    }
+
+    @Test
+    void deleteFailsWithoutRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        when(log.isWarnEnabled()).thenReturn(true);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');
+        final Set<PosixFilePermission> permissions = 
PosixFilePermissions.fromString(rw_rw_r__);
+        setPosixFilePermissions(basedir, permissions);
+        try {
+            final Cleaner cleaner = new Cleaner(null, log, false, null, null);
+            final IOException exception =
+                    assertThrows(IOException.class, () -> 
cleaner.delete(basedir.toFile(), null, false, true, false));
+            verify(log, never()).warn(any(CharSequence.class), 
any(Throwable.class));
+            assertEquals("Failed to delete " + basedir, 
exception.getMessage());
+            final DirectoryNotEmptyException cause =
+                    assertInstanceOf(DirectoryNotEmptyException.class, 
exception.getCause());
+            assertEquals(basedir.toString(), cause.getMessage());
+        } finally {
+            // Allow the tempDir to be cleared by the @TempDir extension.
+            setPosixFilePermissions(basedir, initialPermissions);
+        }
+    }
+
+    @Test
+    void deleteFailsAfterRetryWhenNoPermission(@TempDir Path tempDir) throws 
Exception {
+        assumeTrue(POSIX_COMPLIANT);
+        final Path basedir = 
createDirectory(tempDir.resolve("target")).toRealPath();
+        createFile(basedir.resolve("file"));
+        final Set<PosixFilePermission> initialPermissions = 
getPosixFilePermissions(basedir);
+        final String rwxrwxr_x = 
PosixFilePermissions.toString(initialPermissions);
+        // Prevent directory listing, which will result in a 
DirectoryNotEmptyException.
+        final String rw_rw_r__ = rwxrwxr_x.replace('x', '-');

Review Comment:
   Is replace needed here? Could this just be a string literal?



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