Add test for using unicode escape as function name

Author: Yui T

tests/cases/fourslash/completionListForUnicodeEscapeName.ts

@@ -0,0 +1,27 @@
+/// <reference path='fourslash.ts' />
+
+////function \u0042 () { /*0*/ }
+////export default function \u0043 () { /*1*/ }
+////class \u0041 { /*2*/ }
+/////*3*/
+
+goTo.marker("0");
+verify.not.completionListContains("B");
+verify.not.completionListContains("\u0042");
+
+goTo.marker("2");
+verify.not.completionListContains("C");
+verify.not.completionListContains("\u0043");
+
+goTo.marker("2");
+verify.not.completionListContains("A");
+verify.not.completionListContains("\u0041");
+
+goTo.marker("3");
+verify.not.completionListContains("B");
+verify.not.completionListContains("\u0042");
+verify.not.completionListContains("A");
+verify.not.completionListContains("\u0041");
+verify.not.completionListContains("C");
+verify.not.completionListContains("\u0043");
+