backend/tests: Add blackbox tests from Kotlin JVM

Added tests from testData/codegen/box directory. There are blackbox tests
in other directories and they are to be added.

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/boolean.kt

@@ -0,0 +1,13 @@
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+fun checkLess(x: Boolean, y: Boolean) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(false, true)

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/comparable.kt

@@ -0,0 +1,16 @@
+interface A : Comparable<A>
+
+class B(val x: Int) : A {
+    override fun compareTo(other: A) = x.compareTo((other as B).x)
+}
+
+fun checkLess(x: A, y: A) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(B(0), B(1))

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/doubleInt.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Double, y: Int) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(0.5, 1)

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/doubleLong.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Double, y: Long) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(0.5, 1.toLong())

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/extensionArray.kt

@@ -0,0 +1,16 @@
+fun checkLess(x: Array<Int>, y: Array<Int>) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+operator fun Array<Int>.compareTo(other: Array<Int>) = size - other.size
+
+fun box(): String {
+    val a = arrayOfNulls<Int>(0) as Array<Int>
+    val b = arrayOfNulls<Int>(1) as Array<Int>
+    return checkLess(a, b)
+}

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/extensionObject.kt

@@ -0,0 +1,14 @@
+class A(val x: Int)
+
+operator fun A.compareTo(other: A) = x.compareTo(other.x)
+
+fun checkLess(x: A, y: A) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(A(0), A(1))

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/intDouble.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Int, y: Double) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(0, 0.5)

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/intLong.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Int, y: Long) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(0, 123456789123.toLong())

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/longDouble.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Long, y: Double) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(0.toLong(), 0.5)

backend.native/tests/external/codegen/blackbox/operatorConventions/compareTo/longInt.kt

@@ -0,0 +1,10 @@
+fun checkLess(x: Long, y: Int) = when {
+    x >= y    -> "Fail $x >= $y"
+    !(x < y)  -> "Fail !($x < $y)"
+    !(x <= y) -> "Fail !($x <= $y)"
+    x > y     -> "Fail $x > $y"
+    x.compareTo(y) >= 0 -> "Fail $x.compareTo($y) >= 0"
+    else -> "OK"
+}
+
+fun box() = checkLess(-123456789123.toLong(), 0)