fix(34621): show suggestions in class property initializer (#35999)

Author: a-tarasyuk

src/services/completions.ts

@@ -2608,6 +2608,9 @@ namespace ts.Completions {
         if (!contextToken) return undefined;
 
         switch (contextToken.kind) {
+            case SyntaxKind.EqualsToken: // class c { public prop = | /* global completions */ }
+                return undefined;
+
             case SyntaxKind.SemicolonToken: // class c {getValue(): number; | }
             case SyntaxKind.CloseBraceToken: // class c { method() { } | }
                 // class c { method() { } b| }

tests/cases/fourslash/completionsClassPropertiesAssignment.ts

@@ -0,0 +1,29 @@
+/// <reference path='fourslash.ts'/>
+
+////class Class1 {
+////   protected a = /*1*/
+////   private b = /*2*/
+////   public c = /*3*/
+////   public d = this./*4*/
+////}
+////
+////class Class2 {
+////   a = /*5*/
+////}
+////class Class3 {
+////   a = /*6*/
+////}
+////
+////const prop = 'prop';
+////class Class4 {
+////   [prop] = /*7*/
+////}
+
+const exact = completion.globalsPlus(["Class1", "Class2", "Class3", "prop", "Class4"]);
+verify.completions({ marker: ["1"], exact });
+verify.completions({ marker: ["2"], exact });
+verify.completions({ marker: ["3"], exact });
+verify.completions({ marker: ["4"], exact: ['a', 'b', 'c', 'd'], isGlobalCompletion: false });
+verify.completions({ marker: ["5"], exact });
+verify.completions({ marker: ["6"], exact });
+verify.completions({ marker: ["7"], exact });