From 4a642c13ba7e745d5228b75a18c0c05bffbb00e4 Mon Sep 17 00:00:00 2001
From: sparkhi <4743002+sparkhi@users.noreply.github.com>
Date: Tue, 14 Apr 2026 13:31:13 +0100
Subject: [PATCH 1/3] Failing test for IO-890

---
 .../java/org/apache/commons/io/FilenameUtilsTest.java  | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
index 9250e810bc6..7990668a02e 100644
--- a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
+++ b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
@@ -1208,4 +1208,14 @@ void testSeparatorsToWindows() {
         assertEquals("\\a\\b\\c", FilenameUtils.separatorsToWindows("/a/b/c"));
         assertEquals("D:\\a\\b\\c", FilenameUtils.separatorsToWindows("D:/a/b/c"));
     }
+    
+    @Test
+    void testFilenameWithSeparatorCharOnNonWindows() throws IOException {
+        if (!WINDOWS) {
+            Path testFileWithBackSlash = Files.createTempFile(temporaryFolder, "file\\with\\backslash", "txt");
+            String actualFileName = FilenameUtils.getName(testFileWithBackSlash.toString());
+            String expectedFileName = testFileWithBackSlash.getFileName().toString();
+            assertEquals(expectedFileName, actualFileName);
+        }
+    }
 }

From f9a21ef4982009a696f11f627910a4059387be45 Mon Sep 17 00:00:00 2001
From: sparkhi <4743002+sparkhi@users.noreply.github.com>
Date: Tue, 14 Apr 2026 13:49:09 +0100
Subject: [PATCH 2/3] Failing test for IO-890

---
 src/test/java/org/apache/commons/io/FilenameUtilsTest.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
index 7990668a02e..d18488d926c 100644
--- a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
+++ b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
@@ -1212,9 +1212,9 @@ void testSeparatorsToWindows() {
     @Test
     void testFilenameWithSeparatorCharOnNonWindows() throws IOException {
         if (!WINDOWS) {
-            Path testFileWithBackSlash = Files.createTempFile(temporaryFolder, "file\\with\\backslash", "txt");
+            Path testFileWithBackSlash = Files.createTempFile(temporaryFolder, "file\\with\\backslash", ".txt");
             String actualFileName = FilenameUtils.getName(testFileWithBackSlash.toString());
-            String expectedFileName = testFileWithBackSlash.getFileName().toString();
+            String expectedFileName = new File(testFileWithBackSlash.toString()).getName();
             assertEquals(expectedFileName, actualFileName);
         }
     }

From 937bbd5f47d6e36f5fae5a00af518e33e2fc39d2 Mon Sep 17 00:00:00 2001
From: sparkhi <4743002+sparkhi@users.noreply.github.com>
Date: Tue, 14 Apr 2026 15:49:34 +0100
Subject: [PATCH 3/3] checkstyle suggestions taken

---
 .../java/org/apache/commons/io/FilenameUtilsTest.java     | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
index d18488d926c..8db33ba3108 100644
--- a/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
+++ b/src/test/java/org/apache/commons/io/FilenameUtilsTest.java
@@ -1208,13 +1208,13 @@ void testSeparatorsToWindows() {
         assertEquals("\\a\\b\\c", FilenameUtils.separatorsToWindows("/a/b/c"));
         assertEquals("D:\\a\\b\\c", FilenameUtils.separatorsToWindows("D:/a/b/c"));
     }
-    
+
     @Test
     void testFilenameWithSeparatorCharOnNonWindows() throws IOException {
         if (!WINDOWS) {
-            Path testFileWithBackSlash = Files.createTempFile(temporaryFolder, "file\\with\\backslash", ".txt");
-            String actualFileName = FilenameUtils.getName(testFileWithBackSlash.toString());
-            String expectedFileName = new File(testFileWithBackSlash.toString()).getName();
+            final Path testFileWithBackSlash = Files.createTempFile(temporaryFolder, "file\\with\\backslash", ".txt");
+            final String actualFileName = FilenameUtils.getName(testFileWithBackSlash.toString());
+            final String expectedFileName = new File(testFileWithBackSlash.toString()).getName();
             assertEquals(expectedFileName, actualFileName);
         }
     }