Add additional tests

tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt

@@ -0,0 +1,35 @@
+tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts(20,11): error TS1138: Parameter declaration expected.
+
+
+==== tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts (1 errors) ====
+    function f1(x,) {}
+    
+    f1(1,);
+    
+    function f2(...args,) {}
+    
+    f2(...[],);
+    
+    // Not confused by overloads
+    declare function f3(x, ): number;
+    declare function f3(x, y,): string;
+    
+    <number>f3(1,);
+    <string>f3(1, 2,);
+    
+    // Works for constructors too
+    class X {
+        constructor(a,) { }
+        // *Not* allowed in getter
+        get x(,) { return 0; }
+              ~
+!!! error TS1138: Parameter declaration expected.
+        set x(value,) { }
+    }
+    interface Y {
+        new(x,);
+        (x,);
+    }
+    
+    new X(1,);
+    

tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js

@@ -17,7 +17,15 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
+    // *Not* allowed in getter
+    get x(,) { return 0; }
+    set x(value,) { }
 }
+interface Y {
+    new(x,);
+    (x,);
+}
+
 new X(1,);
 
 
@@ -37,6 +45,13 @@ f3(1, 2);
 var X = (function () {
     function X(a) {
     }
+    Object.defineProperty(X.prototype, "x", {
+        // *Not* allowed in getter
+        get: function () { return 0; },
+        set: function (value) { },
+        enumerable: true,
+        configurable: true
+    });
     return X;
 }());
 new X(1);

tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts

@@ -16,5 +16,13 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
+    // *Not* allowed in getter
+    get x(,) { return 0; }
+    set x(value,) { }
 }
+interface Y {
+    new(x,);
+    (x,);
+}
+
 new X(1,);