Hacktober fest raje pr1

src/main/java/file/FileRenameSnippet.java

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+/*
+ * MIT License
+ *
+ * Copyright (c) 2017-2024 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package file;
+
+import java.io. File;
+
+/**
+ * FileRenameSnippet.
+ */
+
+public class FileRenameSnippet {
+
+    public static void fileRename(String oldFileName, String newFileName) {
+        // Get the old and new file names from the user
+       // String oldFileName = "old_file.txt";
+      //  String newFileName = "new_file.txt";
+
+        // Create File objects for the old and new files
+        File oldFile = new File(oldFileName);
+        File newFile = new File(newFileName);
+
+        // Check if the old file exists
+        if (!oldFile.exists()) {
+            System.out .println("The old file " + oldFileName + " does not exist.");
+            return;
+        }
+
+        // Check if the new file already exists
+        if (newFile.exists()) {
+            System.out.println("The new file " + newFileName + " already exists.");
+            return;
+        }
+
+        // Rename the file
+        boolean renamed = oldFile.renameTo(newFile);
+
+        if (renamed) {
+            System.out.println("File renamed successfully.");
+        } else {
+            System.out.println("Failed to rename the file.");
+
+        }
+    }
+}

src/test/java/file/FileRenameSnippetTest.java

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+/*
+ * MIT License
+ *
+ * Copyright (c) 2017-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package file;
+
+
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/*
+ * Tests for 30 Seconds of Java code library
+ *
+ */
+class FileRenameSnippetTest {
+
+
+
+
+        @Test
+        void testFileRenameSuccess() {
+            // Create temporary files for testing
+            File oldFile = new File("old_file_test.txt");
+            File newFile = new File("new_file_test.txt");
+
+            try {
+                // Create the old file
+                oldFile.createNewFile();
+
+                // Rename the file
+                FileRenameSnippet.fileRename(oldFile.getAbsolutePath(), newFile.getAbsolutePath());
+
+                // Verify the old file is deleted and the new file is created
+                assertTrue(newFile.exists());
+                assertFalse(oldFile.exists());
+            } catch (IOException e) {
+                fail("Failed to create temporary files: " + e.getMessage());
+            } finally {
+                // Delete the temporary files
+                oldFile.delete();
+                newFile.delete();
+            }
+        }
+
+        @Test
+        void testFileRenameOldFileDoesNotExist() {
+            // Create a new file for testing
+            File newFile = new File("new_file_test.txt");
+
+            try {
+                // Try to rename a non-existent old file
+                FileRenameSnippet.fileRename("non_existent_file.txt", newFile.getAbsolutePath());
+
+                // Verify the new file is not created
+                assertFalse(newFile.exists());
+            } catch (Exception e) {
+                // Expecting an exception since the old file doesn't exist
+                assertTrue(e.getMessage().contains("The old file non_existent_file.txt does not exist."));
+            } finally {
+                // Delete the temporary file
+                newFile.delete();
+            }
+        }
+
+        @Test
+        void testFileRenameNewFileAlreadyExists() {
+            // Create temporary files for testing
+            File oldFile = new File("old_file_test.txt");
+            File newFile = new File("new_file_test.txt");
+
+            try {
+                // Create both files
+                oldFile.createNewFile();
+                newFile.createNewFile();
+
+                // Try to rename the old file to an existing new file
+                FileRenameSnippet.fileRename(oldFile.getAbsolutePath(), newFile.getAbsolutePath());
+
+                // Verify the old file is not deleted and the new file is not overwritten
+                assertTrue(oldFile.exists());
+                assertTrue(newFile.exists());
+            } catch (IOException e) {
+                fail("Failed to create temporary files: " + e.getMessage());
+            } finally {
+                // Delete the temporary files
+                oldFile.delete();
+                newFile.delete();
+            }
+        }
+    }
+
+