// Copyright (c) 2013 The Chromium 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 "testing/gtest/include/gtest/gtest.h"
#include "tools/gn/scheduler.h"
#include "tools/gn/scope.h"
#include "tools/gn/test_with_scope.h"


// Checks that we find unused identifiers in targets.
TEST(FunctionsTarget, CheckUnused) {
  Scheduler scheduler;
  TestWithScope setup;

  // The target generator needs a place to put the targets or it will fail.
  Scope::ItemVector item_collector;
  setup.scope()->set_item_collector(&item_collector);

  // Test a good one first.
  TestParseInput good_input(
      "source_set(\"foo\") {\n"
      "}\n");
  ASSERT_FALSE(good_input.has_error());
  Err err;
  good_input.parsed()->Execute(setup.scope(), &err);
  ASSERT_FALSE(err.has_error()) << err.message();

  // Test a source set with an unused variable.
  TestParseInput source_set_input(
      "source_set(\"foo\") {\n"
      "  unused = 5\n"
      "}\n");
  ASSERT_FALSE(source_set_input.has_error());
  err = Err();
  source_set_input.parsed()->Execute(setup.scope(), &err);
  ASSERT_TRUE(err.has_error());
}

// Checks that the defaults applied to a template invoked by target() use
// the name of the template, rather than the string "target" (which is the
// name of the actual function being called).
TEST(FunctionsTarget, TemplateDefaults) {
  Scheduler scheduler;
  TestWithScope setup;

  // The target generator needs a place to put the targets or it will fail.
  Scope::ItemVector item_collector;
  setup.scope()->set_item_collector(&item_collector);

  // Test a good one first.
  TestParseInput good_input(
      // Make a template with defaults set.
      "template(\"my_templ\") {\n"
      "  source_set(target_name) {\n"
      "    forward_variables_from(invoker, \"*\")\n"
      "  }\n"
      "}\n"
      "set_defaults(\"my_templ\") {\n"
      "  default_value = 1\n"
      "}\n"

      // Invoke the template with target(). This will fail to execute if the
      // defaults were not set properly, because "default_value" won't exist.
      "target(\"my_templ\", \"foo\") {\n"
      "  print(default_value)\n"
      "}\n");
  ASSERT_FALSE(good_input.has_error());
  Err err;
  good_input.parsed()->Execute(setup.scope(), &err);
  ASSERT_FALSE(err.has_error()) << err.message();
}