[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/when/withSubject.fir.kt

@@ -0,0 +1,36 @@
+// !LANGUAGE: +AllowContractsForCustomFunctions +UseReturnsEffect
+// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
+
+import kotlin.contracts.*
+
+fun isString(x: Any?): Boolean {
+    contract {
+        returns(true) implies (x is String)
+    }
+    return x is String
+}
+
+fun exhaustive(x: Any?) {
+    when (isString(x)) {
+        true -> x.<!UNRESOLVED_REFERENCE!>length<!>
+        false -> x.<!UNRESOLVED_REFERENCE!>length<!>
+    }
+
+    when(!isString(x)) {
+        true -> x.<!UNRESOLVED_REFERENCE!>length<!>
+        false -> x.<!UNRESOLVED_REFERENCE!>length<!>
+    }
+}
+
+fun smartcastInElse(x: Any?) {
+    when (isString(x)) {
+        false -> x.<!UNRESOLVED_REFERENCE!>length<!>
+        else -> x.<!UNRESOLVED_REFERENCE!>length<!>
+    }
+
+    when (!isString(x)) {
+        true -> x.<!UNRESOLVED_REFERENCE!>length<!>
+        else -> x.<!UNRESOLVED_REFERENCE!>length<!>
+    }
+}