Change a hardcoded Xcode test device to getting from the device list.

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/KotlinNativeTargetConfigurator.kt

@@ -43,6 +43,7 @@ import org.jetbrains.kotlin.gradle.tasks.*
 import org.jetbrains.kotlin.gradle.testing.internal.configureConventions
 import org.jetbrains.kotlin.gradle.testing.internal.kotlinTestRegistry
 import org.jetbrains.kotlin.gradle.testing.testTaskName
+import org.jetbrains.kotlin.gradle.utils.Xcode
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 import org.jetbrains.kotlin.konan.target.HostManager
 import org.jetbrains.kotlin.konan.target.KonanTarget
@@ -668,12 +669,8 @@ class KotlinNativeTargetWithSimulatorTestsConfigurator :
     override fun configureTestTask(target: KotlinNativeTargetWithSimulatorTests, testTask: KotlinNativeSimulatorTest) {
         super.configureTestTask(target, testTask)
 
-        testTask.deviceId = when (target.konanTarget) {
+        testTask.deviceId = Xcode.getDefaultTestDeviceId(target.konanTarget)
-            KonanTarget.IOS_X64, KonanTarget.IOS_SIMULATOR_ARM64 -> "iPhone 12"
+            ?: error("Xcode does not support simulator tests for ${target.konanTarget.name}. Check that requested SDK is installed.")
-            KonanTarget.WATCHOS_X86, KonanTarget.WATCHOS_X64, KonanTarget.WATCHOS_SIMULATOR_ARM64 -> "Apple Watch Series 5 - 44mm"
-            KonanTarget.TVOS_X64, KonanTarget.TVOS_SIMULATOR_ARM64 -> "Apple TV"
-            else -> error("Simulator tests are not supported for platform ${target.konanTarget.name}")
-        }
     }
 
     override fun createTestRun(

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/utils/Xcode.kt

@@ -9,8 +9,10 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode
 import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
 import org.jetbrains.kotlin.konan.target.Architecture.ARM32
 import org.jetbrains.kotlin.konan.target.Architecture.ARM64
+import org.jetbrains.kotlin.konan.target.Family
 import org.jetbrains.kotlin.konan.target.Family.*
 import org.jetbrains.kotlin.konan.target.KonanTarget
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toUpperCaseAsciiOnly
 
 internal object Xcode {
     val currentVersion: String by lazy {
@@ -18,6 +20,37 @@ internal object Xcode {
         out.lines()[0].removePrefix("Xcode ")
     }
 
+    private val defaultTestDevices: Map<Family, String> by lazy {
+        val osRegex = "-- .* --".toRegex()
+        val deviceRegex = """[0-9A-F]{8}-([0-9A-F]{4}-){3}[0-9A-F]{12}""".toRegex()
+
+        val out = runCommand(listOf("/usr/bin/xcrun", "simctl", "list"))
+
+        val result = mutableMapOf<String, String>()
+        var os: String? = null
+        out.lines().forEach { s ->
+            val osFound = osRegex.find(s)?.value
+            if (osFound != null) {
+                os = osFound.split(" ")[1]
+            } else {
+                val currentOs = os
+                if (currentOs != null) {
+                    val deviceFound = deviceRegex.find(s)?.value
+                    if (deviceFound != null) {
+                        result[currentOs] = deviceFound
+                        os = null
+                    }
+                }
+            }
+        }
+
+        result.entries.associate { (osName, deviceId) ->
+            Family.valueOf(osName.toUpperCaseAsciiOnly()) to deviceId
+        }
+    }
+
+    fun getDefaultTestDeviceId(target: KonanTarget): String? = defaultTestDevices[target.family]
+
     fun defaultBitcodeEmbeddingMode(target: KonanTarget, buildType: NativeBuildType): BitcodeEmbeddingMode {
         if (currentVersion.split(".")[0].toInt() < 14) {
             if (target.family in listOf(IOS, WATCHOS, TVOS) && target.architecture in listOf(ARM32, ARM64)) {