From d61e7db937499b0a26efacb8c10c5f92ec512aa2 Mon Sep 17 00:00:00 2001
From: pyos <pyos@google.com>
Date: Wed, 6 Apr 2022 13:10:12 +0200
Subject: [PATCH] JVM_IR: add a test for when(enum) binary compatibility

---
 .../changedEnumsInLibrary/new/enum.kt          |  4 ++++
 .../changedEnumsInLibrary/old/enum.kt          |  4 ++++
 .../changedEnumsInLibrary/output.txt           |  1 +
 .../changedEnumsInLibrary/source.kt            | 18 ++++++++++++++++++
 .../CompileKotlinAgainstCustomBinariesTest.kt  | 11 +++++++++++
 5 files changed, 38 insertions(+)
 create mode 100644 compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/new/enum.kt
 create mode 100644 compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/old/enum.kt
 create mode 100644 compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/output.txt
 create mode 100644 compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/source.kt

diff --git a/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/new/enum.kt b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/new/enum.kt
new file mode 100644
index 00000000000..5f413d9ed79
--- /dev/null
+++ b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/new/enum.kt
@@ -0,0 +1,4 @@
+package test
+
+enum class E1 { A, C, B, D }
+enum class E2 { A, B }
diff --git a/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/old/enum.kt b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/old/enum.kt
new file mode 100644
index 00000000000..2848d4e3abd
--- /dev/null
+++ b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/old/enum.kt
@@ -0,0 +1,4 @@
+package test
+
+enum class E1 { A, B, C }
+enum class E2 { A, B, C }
diff --git a/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/output.txt b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/output.txt
new file mode 100644
index 00000000000..a0aba9318ad
--- /dev/null
+++ b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/output.txt
@@ -0,0 +1 @@
+OK
\ No newline at end of file
diff --git a/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/source.kt b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/source.kt
new file mode 100644
index 00000000000..0828132994c
--- /dev/null
+++ b/compiler/testData/compileKotlinAgainstCustomBinaries/changedEnumsInLibrary/source.kt
@@ -0,0 +1,18 @@
+import test.*
+
+fun f1(x: E1) = when (x) {
+    E1.A -> "A"
+    E1.B -> "B"
+    E1.C -> "C"
+}
+
+fun f2(x: E2) = when (x) {
+    E2.A -> "A"
+    E2.B -> "B"
+    E2.C -> "C"
+}
+
+fun run(): String {
+    val c2 = try { f2(E2.C) } catch (e: java.lang.NoSuchFieldError) { "" }
+    return f1(E1.A) + f1(E1.B) + f1(E1.C) + f2(E2.A) + f2(E2.B) + c2
+}
\ No newline at end of file
diff --git a/compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt b/compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt
index 68c6309d978..2b68c3d3e76 100644
--- a/compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt
+++ b/compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt
@@ -519,6 +519,17 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
             .loadClass("SourceKt").getDeclaredMethod("run").invoke(null)
     }
 
+    fun testChangedEnumsInLibrary() {
+        val oldLibrary = compileLibrary("old", checkKotlinOutput = {})
+        val newLibrary = compileLibrary("new", checkKotlinOutput = {})
+        compileKotlin("source.kt", tmpdir, listOf(oldLibrary))
+
+        val result =
+            URLClassLoader(arrayOf(newLibrary.toURI().toURL(), tmpdir.toURI().toURL()), ForTestCompileRuntime.runtimeJarClassLoader())
+                .loadClass("SourceKt").getDeclaredMethod("run").invoke(null) as String
+        assertEquals("ABCAB", result)
+    }
+
     fun testClassFromJdkInLibrary() {
         val library = compileLibrary("library")
         compileKotlin("source.kt", tmpdir, listOf(library))