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

compiler/testData/diagnostics/tests/scopes/kt900.fir.kt

@@ -0,0 +1,69 @@
+//FILE:a.kt
+//KT-900 Inaccessible class should be unresolved
+
+package a
+
+fun foo() {
+    val b : B = <!UNRESOLVED_REFERENCE!>B<!>() //only B() is unresolved, but in ": B" and "B.foo()" B should also be unresolved
+    <!UNRESOLVED_REFERENCE!>B<!>.<!UNRESOLVED_REFERENCE!>foo<!>()
+
+    <!UNRESOLVED_REFERENCE!>P<!>.<!UNRESOLVED_REFERENCE!>foo<!>()
+
+    <!UNRESOLVED_REFERENCE!>M<!>.<!UNRESOLVED_REFERENCE!>bar<!>()
+}
+
+class A() {
+    companion object {
+        class B() {
+            companion object {
+                fun foo() {}
+            }
+        }
+
+        object P {
+            fun foo() {}
+        }
+    }
+}
+
+object N {
+    object M {
+        fun bar() {}
+    }
+}
+
+//FILE:b.kt
+package b
+
+import b.N.M
+import b.A.Companion.P
+import b.A.Companion.B
+
+fun foo() {
+    val b : B = B()
+    B.foo()
+
+    P.foo()
+
+    M.bar()
+}
+
+class A() {
+    companion object {
+        class B() {
+            companion object {
+                fun foo() {}
+            }
+        }
+
+        object P {
+            fun foo() {}
+        }
+    }
+}
+
+object N {
+    object M {
+        fun bar() {}
+    }
+}