FIR/UAST: regression test for UCallExpression#getArgumentForParameter

...when argument is a smartcasted expression

If not retrieved, SameParameterValueInspection made a false positive
that the actual value of the corresponding parameter is always null.

^KTIJ-25112

plugins/kotlin/uast/uast-kotlin-base/tests/test/org/jetbrains/uast/test/common/kotlin/UastApiFixtureTestBase.kt

@@ -41,6 +41,30 @@ interface UastApiFixtureTestBase : UastPluginSelection {
         )
     }
 
+    fun checkArgumentForParameter_smartcast(myFixture: JavaCodeInsightTestFixture) {
+        myFixture.configureByText(
+            "main.kt", """
+                open class A
+                class B : A()
+
+                private fun processB(b: B): Int = 2
+
+                fun test(a: A) {
+                    if (a is B) {
+                        process<caret>B(a)
+                    }
+                }
+            """.trimIndent()
+        )
+
+        val uCallExpression = myFixture.file.findElementAt(myFixture.caretOffset).toUElement().getUCallExpression()
+            .orFail("cant convert to UCallExpression")
+        val arg = uCallExpression.getArgumentForParameter(0)
+        TestCase.assertNotNull(arg)
+        TestCase.assertTrue(arg is USimpleNameReferenceExpression)
+        TestCase.assertEquals("a", (arg as? USimpleNameReferenceExpression)?.resolvedName)
+    }
+
     fun checkDivByZero(myFixture: JavaCodeInsightTestFixture) {
         myFixture.configureByText(
             "MyClass.kt", """

plugins/kotlin/uast/uast-kotlin-fir/tests/test/org/jetbrains/fir/uast/test/FirUastApiFixtureTest.kt

@@ -26,6 +26,10 @@ class FirUastApiFixtureTest : KotlinLightCodeInsightFixtureTestCase(), UastApiFi
         doCheck("AssigningArrayElementType", ::checkAssigningArrayElementType)
     }
 
+    fun testArgumentForParameter_smartcast() {
+        doCheck("ArgumentForParameter_smartcast", ::checkArgumentForParameter_smartcast)
+    }
+
     fun testDivByZero() {
         doCheck("DivByZero", ::checkDivByZero)
     }

plugins/kotlin/uast/uast-kotlin/tests/test/org/jetbrains/uast/test/kotlin/comparison/FE1UastApiFixtureTest.kt

@@ -19,6 +19,10 @@ class FE1UastApiFixtureTest : KotlinLightCodeInsightFixtureTestCase(), UastApiFi
         checkAssigningArrayElementType(myFixture)
     }
 
+    fun testArgumentForParameter_smartcast() {
+        checkArgumentForParameter_smartcast(myFixture)
+    }
+
     fun testDivByZero() {
         checkDivByZero(myFixture)
     }