src/cobalt/bindings/testing/stack_trace_test.cc

/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "cobalt/bindings/testing/bindings_test_base.h"

namespace cobalt {
namespace bindings {
namespace testing {

namespace {
class StackTraceTest : public BindingsTestBase {};
}  // namespace

TEST_F(StackTraceTest, GetStackTrace) {
  std::string result;

  // We expect the to be in bar (line 2), called from foo (line 6),
  // called from foo (line 8) 4 times, called outside of a function (line
  // 11).
  std::string script =
      "function bar() {\n"
      "return getStackTrace();\n"
      "}\n"
      "function foo(depth) {\n"
      "  if  (depth <= 0) {\n"
      "    return bar();\n"
      "  } else {\n"
      "    return foo(depth - 1);\n"
      "  }\n"
      "}\n"
      "foo(4)";
  EXPECT_TRUE(EvaluateScript(script, &result));

  // Expect that bar is on top.
  std::string match_line = "bar @ [object BindingsTestBase]:2\n";
  size_t position = result.find(match_line);
  EXPECT_TRUE(position != std::string::npos);
  // Expect a foo at line 6.
  match_line = "foo @ [object BindingsTestBase]:6\n";
  position = result.find(match_line, ++position);
  EXPECT_TRUE(position != std::string::npos);
  // Expect 4 subsequent foos at line 8.
  match_line = "foo @ [object BindingsTestBase]:8\n";
  for (int i = 0; i < 4; ++i) {
    position = result.find(match_line, ++position);
    EXPECT_TRUE(position != std::string::npos);
  }
  // Expect global code at line 11.
  match_line = "global code @ [object BindingsTestBase]:11";
  position = result.find(match_line, ++position);
  EXPECT_TRUE(position != std::string::npos);
}

}  // namespace testing
}  // namespace bindings
}  // namespace cobalt