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

compiler/testData/diagnostics/testsWithStdLib/contracts/fromStdlib/check.fir.kt

@@ -0,0 +1,33 @@
+// !LANGUAGE: +ReadDeserializedContracts +UseReturnsEffect
+// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
+
+fun testCheckSmartcast(x: Any?) {
+    check(x is String)
+    x.length
+}
+
+fun testCheckUnreachableCode() {
+    check(false)
+    // Can't be reported without notion of 'iff'
+    println("Can't get here!")
+}
+
+fun testCheckWithMessage(x: Any?) {
+    check(x is String) { "x is not String!" }
+    x.length
+}
+
+fun testCheckWithFailingMessage(x: Any?) {
+    check(x is String) { throw kotlin.<!UNRESOLVED_REFERENCE!>IllegalStateException<!>("What a strange idea") }
+    x.length
+}
+
+fun testCheckNotNullWithMessage(x: Int?) {
+    checkNotNull(x) { "x is null!" }
+    x.inc()
+}
+
+fun testCheckNotNull(x: Int?) {
+    checkNotNull(x)
+    x.inc()
+}