[FIR-TEST] Add test with unresolved SAM usage of Comparator

compiler/fir/resolve/testData/resolve/stdlib/problems/unresolvedComparator.kt

@@ -0,0 +1,15 @@
+fun test_1() {
+    val comp = <!UNRESOLVED_REFERENCE!>Comparator<!><Int> { x, y -> 1 }
+}
+
+fun test_2(list: List<Int>) {
+    val comp = java.util.<!UNRESOLVED_REFERENCE!>Comparator<!><Int> { x, y -> 1 }
+}
+
+fun test_3(comparator: java.util.Comparator<Int>) {
+    comparator.compare(1, 2)
+}
+
+fun test_4(comparator: Comparator<Int>) {
+    comparator.compare(1, 2)
+}

compiler/fir/resolve/testData/resolve/stdlib/problems/unresolvedComparator.txt

@@ -0,0 +1,19 @@
+FILE: unresolvedComparator.kt
+    public final fun test_1(): R|kotlin/Unit| {
+        lval comp: <ERROR TYPE REF: Unresolved name: Comparator> = <Unresolved name: Comparator>#<R|kotlin/Int|>(<L> = Comparator@fun <anonymous>(x: R|class error: No type for parameter|, y: R|class error: No type for parameter|): R|kotlin/Int| {
+            Int(1)
+        }
+        )
+    }
+    public final fun test_2(list: R|kotlin/collections/List<kotlin/Int>|): R|kotlin/Unit| {
+        lval comp: <ERROR TYPE REF: Unresolved name: Comparator> = Q|java/util|.<Unresolved name: Comparator>#<R|kotlin/Int|>(<L> = Comparator@fun <anonymous>(x: R|class error: No type for parameter|, y: R|class error: No type for parameter|): R|kotlin/Int| {
+            Int(1)
+        }
+        )
+    }
+    public final fun test_3(comparator: R|java/util/Comparator<kotlin/Int>|): R|kotlin/Unit| {
+        R|<local>/comparator|.R|FakeOverride<java/util/Comparator.compare: R|kotlin/Int|>|(Int(1), Int(2))
+    }
+    public final fun test_4(comparator: R|kotlin/Comparator<kotlin/Int>|): R|kotlin/Unit| {
+        R|<local>/comparator|.R|FakeOverride<java/util/Comparator.compare: R|kotlin/Int|>|(Int(1), Int(2))
+    }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsWithStdlibTestGenerated.java

@@ -481,4 +481,22 @@ public class FirDiagnosticsWithStdlibTestGenerated extends AbstractFirDiagnostic
             runTest("compiler/fir/resolve/testData/resolve/stdlib/j+k/StaticGenericMethod.kt");
         }
     }
+
+    @TestMetadata("compiler/fir/resolve/testData/resolve/stdlib/problems")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Problems extends AbstractFirDiagnosticsWithStdlibTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, this, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInProblems() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/fir/resolve/testData/resolve/stdlib/problems"), Pattern.compile("^([^.]+)\\.kt$"), true);
+        }
+
+        @TestMetadata("unresolvedComparator.kt")
+        public void testUnresolvedComparator() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/stdlib/problems/unresolvedComparator.kt");
+        }
+    }
 }