Add FileNameValidatorTests

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/androidTest/java/com/nextcloud/utils/FileNameValidatorTests.kt

@@ -0,0 +1,73 @@
+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2024 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package com.nextcloud.utils
+
+import com.nextcloud.utils.fileNameValidator.FileNameValidator
+import com.owncloud.android.AbstractIT
+import com.owncloud.android.R
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class FileNameValidatorTests: AbstractIT() {
+
+    @Test
+    fun testInvalidCharacter() {
+        val result = FileNameValidator.isValid("file<name", targetContext)
+        assertEquals("File name contains invalid characters: <", result)
+    }
+
+    @Test
+    fun testReservedName() {
+        val result = FileNameValidator.isValid("CON", targetContext)
+        assertEquals(targetContext.getString(R.string.file_name_validator_error_reserved_names), result)
+    }
+
+    @Test
+    fun testEndsWithSpaceOrPeriod() {
+        val result = FileNameValidator.isValid("filename ", targetContext)
+        assertEquals(targetContext.getString(R.string.file_name_validator_error_ends_with_space_period), result)
+
+        val result2 = FileNameValidator.isValid("filename.", targetContext)
+        assertEquals(targetContext.getString(R.string.file_name_validator_error_ends_with_space_period), result2)
+    }
+
+    @Test
+    fun testEmptyFileName() {
+        val result = FileNameValidator.isValid("", targetContext)
+        assertEquals(targetContext.getString(R.string.filename_empty), result)
+    }
+
+    @Test
+    fun testFileAlreadyExists() {
+        val existingFiles = mutableSetOf("existingFile")
+        val result = FileNameValidator.isValid("existingFile", targetContext, existingFiles)
+        assertEquals(targetContext.getString(R.string.file_already_exists), result)
+    }
+
+    @Test
+    fun testValidFileName() {
+        val result = FileNameValidator.isValid("validFileName", targetContext)
+        assertNull(result)
+    }
+
+    @Test
+    fun testIsFileHidden() {
+        assertTrue(FileNameValidator.isFileHidden(".hiddenFile"))
+        assertFalse(FileNameValidator.isFileHidden("visibleFile"))
+    }
+
+    @Test
+    fun testIsFileNameAlreadyExist() {
+        val existingFiles = mutableSetOf("existingFile")
+        assertTrue(FileNameValidator.isFileNameAlreadyExist("existingFile", existingFiles))
+        assertFalse(FileNameValidator.isFileNameAlreadyExist("newFile", existingFiles))
+    }
+}

app/src/main/java/com/nextcloud/utils/fileNameValidator/FileNameValidator.kt

@@ -49,5 +49,5 @@ object FileNameValidator {
 
     fun isFileHidden(name: String): Boolean = !TextUtils.isEmpty(name) && name[0] == '.'
 
-    private fun isFileNameAlreadyExist(name: String, fileNames: MutableSet<String>): Boolean = fileNames.contains(name)
+    fun isFileNameAlreadyExist(name: String, fileNames: MutableSet<String>): Boolean = fileNames.contains(name)
 }

app/src/main/res/values/strings.xml

@@ -1219,7 +1219,7 @@
     <string name="unified_search_fragment_contact_not_found">Contact not found, you can always sync to update. Redirecting to web…</string>
     <string name="unified_search_fragment_permission_needed">Permissions are required to open search result otherwise it will redirected to web…</string>
 
-    <string name="file_name_validator_error_invalid_character">File name contains invalid characters %s</string>
+    <string name="file_name_validator_error_invalid_character">File name contains invalid characters: %s</string>
     <string name="file_name_validator_error_reserved_names">File name is a reserved name</string>
     <string name="file_name_validator_error_ends_with_space_period">File name ends with a space or a period</string>
 </resources>