[tests] Add test data for KT-63705

compiler/testData/codegen/box/smartCasts/NullableFunctionTypeAsMemberImmutableProperty.kt

@@ -0,0 +1,29 @@
+// IGNORE_BACKEND_K1: ANY
+// ISSUE: KT-63705
+
+fun box(): String {
+    KlassA({})
+    KlassB()
+    return "OK"
+}
+
+class KlassA(arg: (() -> Unit)?) {
+    val func: (() -> Unit)? = arg
+    init {
+        if (func != null) {
+            func()
+        }
+    }
+}
+
+class KlassB {
+    val func: (() -> Unit)?
+    init {
+        if (true) {
+            func = {}
+            func()
+        } else {
+            func = null
+        }
+    }
+}

compiler/testData/codegen/box/smartCasts/NullableFunctionTypeAsMemberImmutablePropertyFromConstructor.kt

@@ -0,0 +1,15 @@
+// IGNORE_BACKEND_K1: ANY
+// ISSUE: KT-63705
+
+fun box(): String {
+    Klass({})
+    return "OK"
+}
+
+class Klass(val func: (() -> Unit)?) {
+    init {
+        if (func != null) {
+            func()
+        }
+    }
+}

compiler/testData/codegen/box/smartCasts/NullableFunctionTypeAsPrimaryConstructorParameter.kt

@@ -0,0 +1,12 @@
+fun box(): String {
+    Klass({})
+    return "OK"
+}
+
+class Klass(func: (() -> Unit)?) {
+    init {
+        if (func != null) {
+            func()
+        }
+    }
+}

compiler/testData/codegen/box/smartCasts/NullableFunctionTypeAsSecondaryConstructorParameter.kt

@@ -0,0 +1,12 @@
+fun box(): String {
+    Klass({})
+    return "OK"
+}
+
+class Klass {
+    constructor(func: (() -> Unit)?) {
+        if (func != null) {
+            func()
+        }
+    }
+}