write & append to file.

Author: HydrolienF

src/main/java/fr/formiko/utils/FLUFiles.java

@@ -6,6 +6,7 @@
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
 import java.util.List;
 
 /**
@@ -33,8 +34,8 @@ private FLUFiles() {} // hide constructor
     public static String readFile(String path) { return internal.readFile(path); }
     public static List<String> readFileAsList(String path) { return internal.readFileAsList(path); }
     public static String readFileFromWeb(String url) { return internal.readFileFromWeb(url); }
-    public static boolean writeFile(String path, String content) { return false; }
-    public static boolean appendToFile(String path, String content) { return false; }
+    public static boolean writeFile(String path, String content) { return internal.writeFile(path, content); }
+    public static boolean appendToFile(String path, String content) { return internal.appendToFile(path, content); }
 
     public static List<String> listFiles(String path) { return null; }
 
@@ -171,5 +172,39 @@ private String readFileFromWeb(String urlString) {
                 return null;
             }
         }
+
+        /**
+         * It will create the file and it's path if needed.
+         */
+        private boolean writeFile(String path, String content) {
+            if (isAValidePath(path)) {
+                new File(path).getParentFile().mkdirs();
+                try {
+                    Files.writeString(Paths.get(path), content, StandardOpenOption.CREATE, StandardOpenOption.WRITE);
+                    return true;
+                } catch (IOException e) {
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        }
+
+        /**
+         * It will create the file and it's path if needed.
+         */
+        private boolean appendToFile(String path, String content) {
+            if (isAValidePath(path)) {
+                new File(path).getParentFile().mkdirs();
+                try {
+                    Files.writeString(Paths.get(path), content, StandardOpenOption.CREATE, StandardOpenOption.APPEND);
+                    return true;
+                } catch (IOException e) {
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        }
     }
 }

src/test/java/fr/formiko/utils/FLUFilesTest.java

@@ -201,4 +201,56 @@ private static Stream<Arguments> testReadFileFromWebSource() { return Stream.of(
                       "message": "100%",
                       "color": "00FF00"
                     }"""), Arguments.of(null, false, null), Arguments.of("h://unexisting.url", false, null)); }
+
+    @ParameterizedTest
+    @MethodSource("testWriteFileSource")
+    void testWriteFile(String path, boolean shouldWork, String content) {
+        assertEquals(shouldWork, FLUFiles.writeFile(path, content));
+        if (shouldWork) {
+            assertEquals(content, FLUFiles.readFile(path));
+            assertEquals(true, FLUFiles.delete(path));
+        }
+    }
+
+    private static Stream<Arguments> testWriteFileSource() {
+        return Stream.of(Arguments.of(TEST_PATH_TEMPORARY + "testWriteFile1.txt", true, "Some content."),
+                Arguments.of(TEST_PATH_TEMPORARY + "testWriteFile2.txt", true, "Some content."),
+                Arguments.of(TEST_PATH_TEMPORARY + "éà@--", true, "Some content."), Arguments.of(null, false, "Some vyzemjzefze"),
+                Arguments.of(TEST_PATH_TEMPORARY + "DIR/2/out.in", true, "Some content"),
+                Arguments.of(TEST_PATH_TEMPORARY + "existingFile2", true, "Some content"));
+    }
+
+    @ParameterizedTest
+    @MethodSource("testAppendToFileSource")
+    void testAppendToFile(String path, boolean shouldWork, String contentToWrite, String expectedContent) {
+        assertEquals(shouldWork, FLUFiles.appendToFile(path, contentToWrite));
+        if (shouldWork) {
+            assertEquals(expectedContent, FLUFiles.readFile(path));
+            assertEquals(true, FLUFiles.delete(path));
+        }
+    }
+
+    private static Stream<Arguments> testAppendToFileSource() {
+        return Stream.of(Arguments.of(TEST_PATH_TEMPORARY + "testAppendToFile1.txt", true, "Some content.", "Some content."),
+                Arguments.of(TEST_PATH_TEMPORARY + "testAppendToFile2.txt", true, "Some content.", "Some content."),
+                Arguments.of(TEST_PATH_TEMPORARY + "éà@--", true, "Some content.", "Some content."),
+                Arguments.of(null, false, "Some vyzemjzefze", ""));
+    }
+
+    @ParameterizedTest
+    @MethodSource("testAppendToExistingFileFileSource")
+    void testAppendToExistingFile(String path, boolean shouldWork, String contentToWrite, String expectedContent, String copyPath) {
+        assertEquals(true, FLUFiles.copy(path, copyPath));
+        assertEquals(shouldWork, FLUFiles.appendToFile(copyPath, contentToWrite));
+        if (shouldWork) {
+            assertEquals(expectedContent, FLUFiles.readFile(copyPath));
+        }
+    }
+
+    private static Stream<Arguments> testAppendToExistingFileFileSource() {
+        return Stream.of(
+                Arguments.of(TEST_PATH + "existingFile3", true, "Some content", "ABCSome content", TEST_PATH_TEMPORARY + "existingFile3"),
+                Arguments.of(TEST_PATH + "existingFile4", true, "Some content", "ABC\nSome content",
+                        TEST_PATH_TEMPORARY + "existingFile4"));
+    }
 }

src/test/resources/existingFile2

@@ -0,0 +1 @@
+ABC

src/test/resources/existingFile3

@@ -0,0 +1 @@
+ABC