Fix new temp dirs not different on native (#1550)

packages/test-base/src/commonTest/kotlin/io/realm/kotlin/test/common/utils/PlatformUtilsTests.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2023 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.realm.kotlin.test.common.utils
+
+import io.realm.kotlin.internal.platform.directoryExists
+import io.realm.kotlin.test.platform.PlatformUtils
+import kotlin.test.Test
+import kotlin.test.assertFalse
+import kotlin.test.assertNotEquals
+import kotlin.test.assertTrue
+
+class PlatformUtilsTests {
+    @Test
+    fun createTempDir_createDifferentDirs() {
+        val testDir1 = PlatformUtils.createTempDir("test-dir")
+        val testDir2 = PlatformUtils.createTempDir("test-dir")
+
+        assertTrue(directoryExists(testDir1))
+        assertTrue(directoryExists(testDir2))
+
+        assertNotEquals(testDir1, testDir2)
+    }
+
+    @Test
+    fun createTempDir_deleteDifferentDirs() {
+        val testDir = PlatformUtils.createTempDir("test-dir")
+        assertTrue(directoryExists(testDir))
+        PlatformUtils.deleteTempDir(testDir)
+        assertFalse(directoryExists(testDir))
+    }
+}

packages/test-base/src/nativeDarwin/kotlin/io/realm/kotlin/test/platform/PlatformUtils.kt

@@ -16,16 +16,17 @@
 
 package io.realm.kotlin.test.platform
 
+import io.realm.kotlin.test.util.Utils
 import kotlinx.cinterop.ULongVar
 import kotlinx.cinterop.alloc
 import kotlinx.cinterop.cValue
-import kotlinx.cinterop.cstr
 import kotlinx.cinterop.memScoped
 import kotlinx.cinterop.ptr
 import kotlinx.cinterop.value
 import platform.posix.S_IRGRP
 import platform.posix.S_IROTH
 import platform.posix.S_IRUSR
+import platform.posix.S_IRWXU
 import platform.posix.nanosleep
 import platform.posix.pthread_threadid_np
 import platform.posix.timespec
@@ -34,10 +35,12 @@ import kotlin.time.Duration
 
 actual object PlatformUtils {
     actual fun createTempDir(prefix: String, readOnly: Boolean): String {
-        // X is a special char which will be replace by mkdtemp template
-        val mask = prefix.replace('X', 'Z', ignoreCase = true)
-        val path = "${platform.Foundation.NSTemporaryDirectory()}$mask"
-        platform.posix.mkdtemp(path.cstr)
+        // Currently we cannot template using platform.posix.mkdtemp
+        // the return value is not of use.
+        val suffix = "-${Utils.createRandomString(6)}"
+        val path = "${platform.Foundation.NSTemporaryDirectory()}$prefix$suffix"
+        platform.posix.mkdir(path, S_IRWXU.toUShort())
+
         if (readOnly) {
             platform.posix.chmod(path, (S_IRUSR or S_IRGRP or S_IROTH).toUShort())
         }