Add test coverage for do-expressions in ReparentExpressionScope()

Change-Id: I42f51fd00b1a21a1ff7ef2379fbf81a42266a737
Reviewed-on: https://chromium-review.googlesource.com/599111Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47137}

test/mjsunit/harmony/do-expressions-arrow-param-scope.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-do-expressions
+
+(function testBasic() {
+  let f = (x = eval("var z = 42; z"), y = do { 43 }) => x + y;
+  assertEquals(85, f());
+})();
+
+(function testReturnParam() {
+  let f = (x = eval("var z = 42; z"), y = do { x }) => x + y;
+  assertEquals(84, f());
+})();
+
+(function testCaptureParam() {
+  let f = (x = eval("var z = 42; z"), y = do { () => x }) => x + y();
+  assertEquals(84, f());
+})();
+
+(function testScoped() {
+  let f = (x = eval("var z = 42; z"), y = do { let z; x }) => x + y;
+  assertEquals(84, f());
+})();
+
+(function testCaptureScoped() {
+  let f = (x = eval("var z = 42; z"), y = do { let z; () => x }) => x + y();
+  assertEquals(84, f());
+})();
+
+(function testCaptureOuter() {
+  let z = 44;
+  let f = (x = eval("var z = 42; z"), y = do { () => z }) => x + y();
+  assertEquals(86, f())
+})();
+
+(function testCaptureOuterScoped() {
+  let z = 44;
+  let f = (x = eval("var z = 42; z"), y = do { let q; () => z }) => x + y();
+  assertEquals(86, f())
+})();
+
+(function testWith() {
+  let f = (x = eval("var z = 42; z"),
+           y = do {
+             with ({foo: "bar"}) {
+               () => x }
+           }) => x + y();
+  assertEquals(84, f())
+})();
+
+(function testTry() {
+  let f = (x = eval("var z = 42; z"),
+           y = do {
+             try { () => x }
+             catch (e) { }
+           }) => x + y();
+  assertEquals(84, f())
+})();
+
+(function testCatch() {
+  let f = (x = eval("var z = 42; z"),
+           y = do {
+             try { throw 42 }
+             catch (e) { () => x }
+           }) => x + y();
+  assertEquals(84, f())
+})();
+
+(function testFinally() {
+  let z = 44;
+  let q;
+  let f = (x = eval("var z = 42; z"),
+           y = do {
+             try { }
+             catch (e) { }
+             finally { q = () => z }
+             q;
+           }) => x + y();
+  assertEquals(86, f())
+})();
+
+(function testFinallyThrow() {
+  let z = 44;
+  let q;
+  let f = (x = eval("var z = 42; z"),
+           y = do {
+             try { throw 42; }
+             catch (e) { }
+             finally { q = () => z }
+             q;
+           }) => x + y();
+  assertEquals(86, f())
+})();