From 50e58c00ea6892ebfdd041d0b471ac6fed23768a Mon Sep 17 00:00:00 2001
From: Stanislav Ruban <stanislav.ruban@jetbrains.com>
Date: Thu, 30 Nov 2023 22:03:44 +0100
Subject: [PATCH] [tests] Add test data for KT-50827

---
 .../box/builderInference/issues/kt50827a.kt   | 33 +++++++++++++++++++
 .../box/builderInference/issues/kt50827b.kt   | 29 ++++++++++++++++
 .../builderInference/issues/kt50827.fir.kt    | 30 +++++++++++++++++
 .../tests/builderInference/issues/kt50827.kt  | 30 +++++++++++++++++
 4 files changed, 122 insertions(+)
 create mode 100644 compiler/testData/codegen/box/builderInference/issues/kt50827a.kt
 create mode 100644 compiler/testData/codegen/box/builderInference/issues/kt50827b.kt
 create mode 100644 compiler/testData/diagnostics/tests/builderInference/issues/kt50827.fir.kt
 create mode 100644 compiler/testData/diagnostics/tests/builderInference/issues/kt50827.kt

diff --git a/compiler/testData/codegen/box/builderInference/issues/kt50827a.kt b/compiler/testData/codegen/box/builderInference/issues/kt50827a.kt
new file mode 100644
index 00000000000..19e54c5f5b6
--- /dev/null
+++ b/compiler/testData/codegen/box/builderInference/issues/kt50827a.kt
@@ -0,0 +1,33 @@
+// ISSUE: KT-50827
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    val box = ClassWithBoundedTypeParameter(
+        build {
+            setTypeVariable(TargetType())
+        }
+    )
+    consumeTargetTypeBuildee(box.buildee)
+    return "OK"
+}
+
+
+
+
+class TargetType
+
+fun consumeTargetTypeBuildee(value: Buildee<TargetType>) {}
+
+class ClassWithBoundedTypeParameter<T: Any>(val buildee: Buildee<T>)
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    private var storage: TV = TargetType() as TV
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/codegen/box/builderInference/issues/kt50827b.kt b/compiler/testData/codegen/box/builderInference/issues/kt50827b.kt
new file mode 100644
index 00000000000..91c17fab562
--- /dev/null
+++ b/compiler/testData/codegen/box/builderInference/issues/kt50827b.kt
@@ -0,0 +1,29 @@
+// ISSUE: KT-50827
+
+fun box(): String {
+    val box = ClassWithBoundedTypeParameter(
+        build {
+            setTypeVariable(TargetType())
+        }
+    )
+    consumeAnyBuildee(box.buildee)
+    return "OK"
+}
+
+
+
+
+class TargetType
+
+fun consumeAnyBuildee(value: Buildee<Any>) {}
+
+class ClassWithBoundedTypeParameter<T: Any>(val buildee: Buildee<T>)
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    private var storage: TV = TargetType() as TV
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.fir.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.fir.kt
new file mode 100644
index 00000000000..0390d5edb80
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.fir.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-50827
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val box = ClassWithBoundedTypeParameter(
+        build {
+            setTypeVariable(TargetType())
+        }
+    )
+    val buildee = box.buildee
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(<!ARGUMENT_TYPE_MISMATCH("Buildee<TargetType>; Buildee<kotlin.Any>")!>buildee<!>)
+}
+
+
+
+
+class TargetType
+
+class ClassWithBoundedTypeParameter<T: Any>(val buildee: Buildee<T>)
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    private var storage: TV = null!!
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.kt
new file mode 100644
index 00000000000..3d547cee1df
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt50827.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-50827
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val box = ClassWithBoundedTypeParameter(
+        build {
+            setTypeVariable(TargetType())
+        }
+    )
+    val buildee = box.buildee
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(<!TYPE_MISMATCH("Buildee<TargetType>; Buildee<Any>"), TYPE_MISMATCH("Buildee<Any>; Buildee<TargetType>")!>buildee<!>)
+}
+
+
+
+
+class TargetType
+
+class ClassWithBoundedTypeParameter<T: Any>(val buildee: Buildee<T>)
+
+class Buildee<TV> {
+    fun setTypeVariable(value: TV) { storage = value }
+    private var storage: TV = null!!
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}