From 63bd3536900fe9ab355d13276cbd62506fcdb317 Mon Sep 17 00:00:00 2001
From: Sebastian Gallese <140911+sgallese@users.noreply.github.com>
Date: Sat, 23 May 2026 16:36:53 -0700
Subject: [PATCH] test: cover filename extension helpers

Add direct unit coverage for filename extension edge cases in the Kotlin string extension helpers.

AI-assistant: Codex (GPT-5)
Signed-off-by: Sebastian Gallese <140911+sgallese@users.noreply.github.com>
---
 .../com/nextcloud/android/utils/ExtensionsTest.kt     | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/app/src/test/java/com/nextcloud/android/utils/ExtensionsTest.kt b/app/src/test/java/com/nextcloud/android/utils/ExtensionsTest.kt
index 0c24d1e97906..5a52fe09cf30 100644
--- a/app/src/test/java/com/nextcloud/android/utils/ExtensionsTest.kt
+++ b/app/src/test/java/com/nextcloud/android/utils/ExtensionsTest.kt
@@ -7,7 +7,10 @@
 package com.nextcloud.android.utils
 
 import com.nextcloud.utils.extensions.getFormattedStringDate
+import com.nextcloud.utils.extensions.extension
 import com.nextcloud.utils.extensions.isCurrentYear
+import com.nextcloud.utils.extensions.removeFileExtension
+import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Test
@@ -37,4 +40,12 @@ class ExtensionsTest {
         assertTrue(actualYearNewValue == "")
         assertFalse(actualYearNewValue == "2022")
     }
+
+    @Test
+    fun fileExtensionHelpers_checkForEdgeCases() {
+        assertEquals("archive.tar", "archive.tar.gz".removeFileExtension())
+        assertEquals("gz", "archive.tar.gz".extension())
+        assertEquals("", ".gitignore".extension())
+        assertEquals("", "filename.".extension())
+    }
 }