[stubs] Add CSA::IsSymbol() and CSA::IsPrivateSymbol().

test/cctest/test-code-stub-assembler.cc

 // Copyright 2015 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.
 
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
 #include "src/compiler/node.h"
 #include "src/isolate.h"
 #include "test/cctest/compiler/code-assembler-tester.h"
@@ skipping 2085 matching lines @@
   Handle<PromiseReactionJobInfo> promise_info =
       Handle<PromiseReactionJobInfo>::cast(result);
   CHECK_EQ(Smi::FromInt(1), promise_info->value());
   CHECK(promise_info->tasks()->IsFixedArray());
   CHECK(promise_info->deferred()->IsFixedArray());
   CHECK(promise_info->context()->IsContext());
   CHECK(promise_info->debug_id()->IsUndefined(isolate));
   CHECK(promise_info->debug_name()->IsUndefined(isolate));
 }
 
+TEST(IsSymbol) {
+  Isolate* isolate(CcTest::InitIsolateOnce());
+
+  const int kNumParams = 1;
+  CodeAssemblerTester data(isolate, kNumParams);
+  CodeStubAssembler m(data.state());
+
+  Node* const symbol = m.Parameter(0);
+  m.Return(m.SelectBooleanConstant(m.IsSymbol(symbol)));
+
+  Handle<Code> code = data.GenerateCode();
+  CHECK(!code.is_null());
+
+  FunctionTester ft(code, kNumParams);
+  Handle<Object> result =
+      ft.Call(isolate->factory()->NewSymbol()).ToHandleChecked();
+  CHECK_EQ(isolate->heap()->true_value(), *result);
+
+  result = ft.Call(isolate->factory()->empty_string()).ToHandleChecked();
+  CHECK_EQ(isolate->heap()->false_value(), *result);
+}
+
+TEST(IsPrivateSymbol) {
+  Isolate* isolate(CcTest::InitIsolateOnce());
+
+  const int kNumParams = 1;
+  CodeAssemblerTester data(isolate, kNumParams);
+  CodeStubAssembler m(data.state());
+
+  Node* const symbol = m.Parameter(0);
+  m.Return(m.SelectBooleanConstant(m.IsPrivateSymbol(symbol)));
+
+  Handle<Code> code = data.GenerateCode();
+  CHECK(!code.is_null());
+
+  FunctionTester ft(code, kNumParams);
+  Handle<Object> result =
+      ft.Call(isolate->factory()->NewSymbol()).ToHandleChecked();
+  CHECK_EQ(isolate->heap()->false_value(), *result);
+
+  result = ft.Call(isolate->factory()->empty_string()).ToHandleChecked();
+  CHECK_EQ(isolate->heap()->false_value(), *result);
+
+  result = ft.Call(isolate->factory()->NewPrivateSymbol()).ToHandleChecked();
+  CHECK_EQ(isolate->heap()->true_value(), *result);
+}
+
 }  // namespace internal
 }  // namespace v8