[NI] Test data to understand changes in the next commit

##KT-31969 In Progress

compiler/testData/diagnostics/tests/inference/commonSystem/kt31969.kt

@@ -0,0 +1,12 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+// !WITH_NEW_INFERENCE
+
+open class View
+
+fun test() {
+    val target = foo<View>() ?: foo() <!NI;USELESS_ELVIS!>?: run {}<!>
+}
+
+fun <T : View> foo(): T? {
+    return null
+}