tools/gn/target_unittest.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "testing/gtest/include/gtest/gtest.h"
   6 #include "tools/gn/build_settings.h"
   7 #include "tools/gn/config.h"
   8 #include "tools/gn/settings.h"
   9 #include "tools/gn/target.h"
  10 #include "tools/gn/toolchain.h"
  11
  12 namespace {
  13
  14 class TargetTest : public testing::Test {
  15  public:
  16   TargetTest()
  17       : build_settings_(),
  18         settings_(&build_settings_, std::string()),
  19         toolchain_(&settings_, Label(SourceDir("//tc/"), "tc")) {
  20     settings_.set_toolchain_label(toolchain_.label());
  21   }
  22   virtual ~TargetTest() {
  23   }
  24
  25  protected:
  26   BuildSettings build_settings_;
  27   Settings settings_;
  28   Toolchain toolchain_;
  29 };
  30
  31 }  // namespace
  32
  33 // Tests that depending on a group is like depending directly on the group's
  34 // deps.
  35 TEST_F(TargetTest, GroupDeps) {
  36   // Two low-level targets.
  37   Target x(&settings_, Label(SourceDir("//component/"), "x"));
  38   Target y(&settings_, Label(SourceDir("//component/"), "y"));
  39
  40   // Make a group for both x and y.
  41   Target g(&settings_, Label(SourceDir("//group/"), "g"));
  42   g.set_output_type(Target::GROUP);
  43   g.deps().push_back(LabelTargetPair(&x));
  44   g.deps().push_back(LabelTargetPair(&y));
  45
  46   // Random placeholder target so we can see the group's deps get inserted at
  47   // the right place.
  48   Target b(&settings_, Label(SourceDir("//app/"), "b"));
  49
  50   // Make a target depending on the group and "b". OnResolved will expand.
  51   Target a(&settings_, Label(SourceDir("//app/"), "a"));
  52   a.set_output_type(Target::EXECUTABLE);
  53   a.deps().push_back(LabelTargetPair(&g));
  54   a.deps().push_back(LabelTargetPair(&b));
  55   a.OnResolved();
  56
  57   // The group's deps should be inserted after the group itself in the deps
  58   // list, so we should get "g, x, y, b"
  59   ASSERT_EQ(4u, a.deps().size());
  60   EXPECT_EQ(&g, a.deps()[0].ptr);
  61   EXPECT_EQ(&x, a.deps()[1].ptr);
  62   EXPECT_EQ(&y, a.deps()[2].ptr);
  63   EXPECT_EQ(&b, a.deps()[3].ptr);
  64 }
  65
  66 // Tests that lib[_dir]s are inherited across deps boundaries for static
  67 // libraries but not executables.
  68 TEST_F(TargetTest, LibInheritance) {
  69   const std::string lib("foo");
  70   const SourceDir libdir("/foo_dir/");
  71
  72   // Leaf target with ldflags set.
  73   Target z(&settings_, Label(SourceDir("//foo/"), "z"));
  74   z.set_output_type(Target::STATIC_LIBRARY);
  75   z.config_values().libs().push_back(lib);
  76   z.config_values().lib_dirs().push_back(libdir);
  77   z.OnResolved();
  78
  79   // All lib[_dir]s should be set when target is resolved.
  80   ASSERT_EQ(1u, z.all_libs().size());
  81   EXPECT_EQ(lib, z.all_libs()[0]);
  82   ASSERT_EQ(1u, z.all_lib_dirs().size());
  83   EXPECT_EQ(libdir, z.all_lib_dirs()[0]);
  84
  85   // Shared library target should inherit the libs from the static library
  86   // and its own. Its own flag should be before the inherited one.
  87   const std::string second_lib("bar");
  88   const SourceDir second_libdir("/bar_dir/");
  89   Target shared(&settings_, Label(SourceDir("//foo/"), "shared"));
  90   shared.set_output_type(Target::SHARED_LIBRARY);
  91   shared.config_values().libs().push_back(second_lib);
  92   shared.config_values().lib_dirs().push_back(second_libdir);
  93   shared.deps().push_back(LabelTargetPair(&z));
  94   shared.OnResolved();
  95
  96   ASSERT_EQ(2u, shared.all_libs().size());
  97   EXPECT_EQ(second_lib, shared.all_libs()[0]);
  98   EXPECT_EQ(lib, shared.all_libs()[1]);
  99   ASSERT_EQ(2u, shared.all_lib_dirs().size());
 100   EXPECT_EQ(second_libdir, shared.all_lib_dirs()[0]);
 101   EXPECT_EQ(libdir, shared.all_lib_dirs()[1]);
 102
 103   // Executable target shouldn't get either by depending on shared.
 104   Target exec(&settings_, Label(SourceDir("//foo/"), "exec"));
 105   exec.set_output_type(Target::EXECUTABLE);
 106   exec.deps().push_back(LabelTargetPair(&shared));
 107   exec.OnResolved();
 108   EXPECT_EQ(0u, exec.all_libs().size());
 109   EXPECT_EQ(0u, exec.all_lib_dirs().size());
 110 }
 111
 112 // Test all/direct_dependent_configs inheritance, and
 113 // forward_dependent_configs_from
 114 TEST_F(TargetTest, DependentConfigs) {
 115   // Set up a dependency chain of a -> b -> c
 116   Target a(&settings_, Label(SourceDir("//foo/"), "a"));
 117   a.set_output_type(Target::EXECUTABLE);
 118   Target b(&settings_, Label(SourceDir("//foo/"), "b"));
 119   b.set_output_type(Target::STATIC_LIBRARY);
 120   Target c(&settings_, Label(SourceDir("//foo/"), "c"));
 121   c.set_output_type(Target::STATIC_LIBRARY);
 122   a.deps().push_back(LabelTargetPair(&b));
 123   b.deps().push_back(LabelTargetPair(&c));
 124
 125   // Normal non-inherited config.
 126   Config config(&settings_, Label(SourceDir("//foo/"), "config"));
 127   c.configs().push_back(LabelConfigPair(&config));
 128
 129   // All dependent config.
 130   Config all(&settings_, Label(SourceDir("//foo/"), "all"));
 131   c.all_dependent_configs().push_back(LabelConfigPair(&all));
 132
 133   // Direct dependent config.
 134   Config direct(&settings_, Label(SourceDir("//foo/"), "direct"));
 135   c.direct_dependent_configs().push_back(LabelConfigPair(&direct));
 136
 137   c.OnResolved();
 138   b.OnResolved();
 139   a.OnResolved();
 140
 141   // B should have gotten both dependent configs from C.
 142   ASSERT_EQ(2u, b.configs().size());
 143   EXPECT_EQ(&all, b.configs()[0].ptr);
 144   EXPECT_EQ(&direct, b.configs()[1].ptr);
 145   ASSERT_EQ(1u, b.all_dependent_configs().size());
 146   EXPECT_EQ(&all, b.all_dependent_configs()[0].ptr);
 147
 148   // A should have just gotten the "all" dependent config from C.
 149   ASSERT_EQ(1u, a.configs().size());
 150   EXPECT_EQ(&all, a.configs()[0].ptr);
 151   EXPECT_EQ(&all, a.all_dependent_configs()[0].ptr);
 152
 153   // Making an an alternate A and B with B forwarding the direct dependents.
 154   Target a_fwd(&settings_, Label(SourceDir("//foo/"), "a_fwd"));
 155   a_fwd.set_output_type(Target::EXECUTABLE);
 156   Target b_fwd(&settings_, Label(SourceDir("//foo/"), "b_fwd"));
 157   b_fwd.set_output_type(Target::STATIC_LIBRARY);
 158   a_fwd.deps().push_back(LabelTargetPair(&b_fwd));
 159   b_fwd.deps().push_back(LabelTargetPair(&c));
 160   b_fwd.forward_dependent_configs().push_back(LabelTargetPair(&c));
 161
 162   b_fwd.OnResolved();
 163   a_fwd.OnResolved();
 164
 165   // A_fwd should now have both configs.
 166   ASSERT_EQ(2u, a_fwd.configs().size());
 167   EXPECT_EQ(&all, a_fwd.configs()[0].ptr);
 168   EXPECT_EQ(&direct, a_fwd.configs()[1].ptr);
 169   ASSERT_EQ(1u, a_fwd.all_dependent_configs().size());
 170   EXPECT_EQ(&all, a_fwd.all_dependent_configs()[0].ptr);
 171 }