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

compiler/testData/diagnostics/tests/DeprecatedUnaryOperatorConventions.fir.kt

@@ -0,0 +1,33 @@
+// !WITH_NEW_INFERENCE
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class Example {
+    operator fun plus(): String = ""
+    operator fun unaryPlus(): Int = 0
+}
+
+class ExampleDeprecated {
+    operator fun plus(): String = ""
+}
+
+operator fun String.plus(): String = this
+operator fun String.unaryPlus(): Int = 0
+
+fun test() {
+    requireInt(+ "")
+    requireInt(+ Example())
+    requireString(<!INAPPLICABLE_CANDIDATE!>+<!> ExampleDeprecated())
+}
+
+fun requireInt(n: Int) {}
+fun requireString(s: String) {}
+
+class Example2 {
+    operator fun plus() = this
+    operator fun minus() = this
+
+    fun test() {
+        <!INAPPLICABLE_CANDIDATE!>+<!>this
+        <!UNRESOLVED_REFERENCE!>-<!>this
+    }
+}