Add test for KT-48807

kotlin-native/Interop/Indexer/src/test/kotlin/org/jetbrains/kotlin/native/interop/indexer/WorkaroundTests.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.native.interop.indexer
+
+import clang.CXTranslationUnit_DetailedPreprocessingRecord
+import clang.clang_disposeTranslationUnit
+import kotlin.test.Test
+
+class WorkaroundTests : IndexerTests() {
+    @Test
+    fun `KT-48807`() {
+        if (System.getProperty("os.name") != "Mac OS X") {
+            return
+        }
+        val code = """
+            #if !defined(NS_FORMAT_ARGUMENT)
+                #if defined(__clang__)
+                #define NS_FORMAT_ARGUMENT(A) __attribute__ ((format_arg(A)))
+                #else
+                #define NS_FORMAT_ARGUMENT(A)
+                #endif
+            #endif
+            
+            NS_FORMAT_ARGUMENT(1) int f(const char* c);
+        """.trimIndent()
+        val compilation = CompilationImpl(
+                includes = emptyList(),
+                additionalPreambleLines = code.split("\n"),
+                compilerArgs = listOf(),
+                language = Language.C
+        )
+        withIndex { index ->
+            val translationUnit = compilation.parse(
+                    index,
+                    options = CXTranslationUnit_DetailedPreprocessingRecord,
+            )
+            try {
+                // Will throw `error: function does not return string` if cinterop
+                // doesn't have a workaround for the `NS_FORMAT_ARGUMENT(A)` macro.
+                translationUnit.ensureNoCompileErrors()
+            } finally {
+                clang_disposeTranslationUnit(translationUnit)
+            }
+        }
+    }
+}