[Tests] Make sure desugaring works with context receivers

compiler/testData/codegen/box/extensionFunctions/contextReceivers/compoundAssignmentOperators.kt

@@ -0,0 +1,67 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+
+data class Result(var i: Int)
+
+var operationScore = 0
+
+context(Int)
+operator fun Result.plus(other: Result): Result {
+    operationScore += this@Int
+    return Result(i + other.i)
+}
+
+context(Int)
+operator fun Result.plusAssign(other: Result) {
+    operationScore += this@Int
+    i += other.i
+}
+
+context(Int)
+operator fun Result.minus(other: Result): Result {
+    operationScore += this@Int
+    return Result(i - other.i)
+}
+
+context(Int)
+operator fun Result.minusAssign(other: Result) {
+    operationScore += this@Int
+    i -= other.i
+}
+
+context(Int)
+operator fun Result.times(other: Result): Result {
+    operationScore += this@Int
+    return Result(i * other.i)
+}
+
+context(Int)
+operator fun Result.timesAssign(other: Result) {
+    operationScore += this@Int
+    i *= other.i
+}
+
+context(Int)
+operator fun Result.div(other: Result): Result {
+    operationScore += this@Int
+    return Result(i / other.i)
+}
+
+context(Int)
+operator fun Result.divAssign(other: Result) {
+    operationScore += this@Int
+    i /= other.i
+}
+
+fun box(): String {
+    val result = Result(0)
+    with(1) {
+        result += (Result(1) + Result(1))
+        result -= (Result(1) - Result(0))
+        result *= (Result(1) * Result(2))
+        result /= (Result(4) / Result(2))
+    }
+    return if (result.i == 1 && operationScore == 8) "OK" else "fail"
+}
+