Added more test cases for highlighting abstract keyword

Author: DickvdBrink

tests/cases/fourslash/getOccurrencesAbstract.ts renamed to tests/cases/fourslash/getOccurrencesAbstract01.ts

@@ -1,6 +1,8 @@
 /// <reference path='fourslash.ts' />
 
 ////[|abstract|] class Animal {
+////    [|abstract|] prop1; // Does not compile
+////    [|abstract|] abstract();
 ////    [|abstract|] walk(): void;
 ////    [|abstract|] makeSound(): void;
 ////}
@@ -12,11 +14,11 @@
 
 const ranges = test.ranges();
 
-for(let r of ranges) {
+for (let r of ranges) {
     goTo.position(r.start);
     verify.occurrencesAtPositionCount(ranges.length);
 
-    for(let range of ranges) {
+    for (let range of ranges) {
         verify.occurrencesAtPositionContains(range, false);
     }
 }

tests/cases/fourslash/getOccurrencesAbstract02.ts

@@ -0,0 +1,29 @@
+/// <reference path='fourslash.ts' />
+
+////// Not valid TS (abstract methods can only appear in abstract classes)
+////class Animal {
+////    [|abstract|] walk(): void;
+////    [|abstract|] makeSound(): void;
+////}
+////// abstract cannot appear here, won't get highlighted
+////let c = /*1*/abstract class Foo {
+////    /*2*/abstract foo(): void;
+////    abstract bar(): void;
+////}
+
+const ranges = test.ranges();
+
+for (let r of ranges) {
+    goTo.position(r.start);
+    verify.occurrencesAtPositionCount(ranges.length);
+
+    for (let range of ranges) {
+        verify.occurrencesAtPositionContains(range, false);
+    }
+}
+
+goTo.marker("1");
+verify.occurrencesAtPositionCount(0);
+
+goTo.marker("2");
+verify.occurrencesAtPositionCount(2);