'quick' directory renamed to 'tests' which reflects its contents

compiler/testData/diagnostics/tests/QualifiedThis.jet

@@ -0,0 +1,41 @@
+class Dup {
+  fun Dup() : Unit {
+    this<!AMBIGUOUS_LABEL!>@Dup<!>
+  }
+}
+
+class A() {
+  fun foo() : Unit {
+    this@A
+    this<!UNRESOLVED_REFERENCE!>@a<!>
+    this
+  }
+
+  val x = this@A.foo()
+  val y = this.foo()
+  val z = foo()
+}
+
+fun foo1() : Unit {
+  <!NO_THIS!>this<!>
+  this<!UNRESOLVED_REFERENCE!>@a<!>
+}
+
+namespace closures {
+    class A(val a:Int) {
+
+      class B() {
+        val x = this@B : B
+        val y = this@A : A
+        val z = this : B
+        val Int.xx = this : Int
+        fun Char.xx() : Any {
+          this : Char
+          val <!UNUSED_VARIABLE!>a<!> = {Double.() => this : Double + this@xx : Char}
+          val <!UNUSED_VARIABLE!>b<!> = @a{Double.() => this@a : Double + this@xx : Char}
+          val <!UNUSED_VARIABLE!>c<!> = @a{() => <!NO_THIS!>this@a<!> + this@xx : Char}
+          return (@a{Double.() => this@a : Double + this@xx : Char})
+        }
+      }
+    }
+}