Add tests

Author: Arthur Ozga

tests/cases/fourslash/codeFixClassExtendAbstractGetter.ts

@@ -2,9 +2,17 @@
 
 //// abstract class A {
 ////     private _a: string;
-//// 
-////     abstract get a(): string;
-////     abstract set a(newName: string);
+////
+////     abstract get a(): number | string;
+////     abstract get b(): this;
+////     abstract get c(): A;
+////
+////     abstract set d(arg: number | string);
+////     abstract set e(arg: this);
+////     abstract set f(arg: A);
+////
+////     abstract get g(): string;
+////     abstract set g(newName: string);
 //// }
 //// 
 //// // Don't need to add anything in this case.
@@ -13,5 +21,11 @@
 //// class C extends A {[| |]}
 
 verify.rangeAfterCodeFix(`
-    a: string;
+    a: string | number;
+    b: this;
+    c: A;
+    d: string | number;
+    e: this;
+    f: A;
+    g: string;
 `);

tests/cases/fourslash/codeFixClassExtendAbstractGetterSetter.ts

@@ -2,6 +2,8 @@
 
 //// abstract class A {
 ////    abstract x: number;
+////    abstract y: this;
+////    abstract z: A;
 ////    abstract foo(): number;
 //// }
 ////
@@ -10,6 +12,8 @@
 
 verify.rangeAfterCodeFix(`
     x: number;
+    y: this;
+    z: A;
     foo(): number {
         throw new Error('Method not implemented.');
     }