[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/objectExpression/expr1.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// WITH_STDLIB
+
+import kotlin.test.*
+
+fun box(): String {
+    val a = "a"
+
+    val x = object {
+        override fun toString(): String {
+            return foo(a) + foo("b")
+        }
+
+        fun foo(s: String) = s + s
+    }
+
+    assertEquals("aabb", x.toString())
+    return "OK"
+}

compiler/testData/codegen/box/objectExpression/expr2.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// WITH_STDLIB
+
+import kotlin.test.*
+
+fun box(): String {
+    val a = "OK"
+
+    val x = object {
+        override fun toString(): String {
+            return foo {
+                a
+            }
+        }
+
+        fun foo(lambda: () -> String) = lambda()
+    }
+
+    return x.toString()
+}

compiler/testData/codegen/box/objectExpression/expr3.jvm_abi.txt

@@ -0,0 +1,9 @@
+MODULE main
+	CLASS Expr3Kt.class
+		PACKAGE METADATA
+			PROPERTY getSb()Ljava/lang/StringBuilder;
+				Property: class.metadata.property.returnType
+					K1
+						java/lang/StringBuilder /* = kotlin/text/StringBuilder^ */
+					K2
+						java/lang/StringBuilder

compiler/testData/codegen/box/objectExpression/expr3.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// JVM_ABI_K1_K2_DIFF: KT-63864
+// WITH_STDLIB
+
+import kotlin.test.*
+
+val sb = StringBuilder()
+
+fun box(): String {
+    var cnt = 0
+
+    var x: Any = ""
+
+    for (i in 0 .. 1) {
+        sb.appendLine(x)
+        cnt++
+        val y = object {
+            override fun toString() = cnt.toString()
+        }
+        x = y
+    }
+    sb.appendLine(x)
+
+    assertEquals("""
+        
+        1
+        2
+
+    """.trimIndent(), sb.toString())
+    return "OK"
+}