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

compiler/testData/diagnostics/tests/extensions/ExtensionFunctions.fir.kt

@@ -0,0 +1,76 @@
+// !WITH_NEW_INFERENCE
+// FILE: b.kt
+package outer
+
+fun Int?.optint() : Unit {}
+val Int?.optval : Unit get() = Unit
+
+fun <T: Any, E> T.foo(x : E, y : A) : T   {
+  y.plus(1)
+  y plus 1
+  y + 1.0
+
+  this?.minus<T>(this)
+
+  return this
+}
+
+class A
+
+infix operator fun A.plus(a : Any) {
+
+  1.foo()
+  true.<!INAPPLICABLE_CANDIDATE!>foo<!>()
+
+  1
+}
+
+operator fun A.plus(a : Int) {
+  1
+}
+
+operator fun <T> T.minus(t : T) : Int = 1
+
+fun test() {
+  val y = 1.abs
+}
+val Int.abs : Int
+  get() = if (this > 0) this else -this;
+
+val <T> T.foo : T
+
+fun Int.foo() = this
+
+// FILE: b.kt
+package null_safety
+
+import outer.*
+
+        fun parse(cmd: String): Command? { return null  }
+        class Command() {
+        //  fun equals(other : Any?) : Boolean
+          val foo : Int = 0
+        }
+
+        fun Any.equals(other : Any?) : Boolean = true
+        fun Any?.equals1(other : Any?) : Boolean = true
+        fun Any.equals2(other : Any?) : Boolean = true
+
+        fun main() {
+
+            System.out.print(1)
+
+            val command = parse("")
+
+            command.foo
+
+            command.<!INAPPLICABLE_CANDIDATE!>equals<!>(null)
+            command?.equals(null)
+            command.equals1(null)
+            command?.equals1(null)
+
+            val c = Command()
+            c?.equals2(null)
+
+            if (command == null) 1
+        }