Add support for reading .gypi files.

tools/gn/input_conversion_unittest.cc

 // 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/err.h"
 #include "tools/gn/input_conversion.h"
+#include "tools/gn/input_file.h"
+#include "tools/gn/parse_tree.h"
+#include "tools/gn/scheduler.h"
 #include "tools/gn/value.h"
 
-TEST(InputConversion, String) {
+namespace {
+
+// InputConversion needs a global scheduler object.
+class InputConversionTest : public testing::Test {
+ public:
+  InputConversionTest() {}
+
+ private:
+  Scheduler scheduler_;
+};
+
+}  // namespace
+
+TEST_F(InputConversionTest, String) {
   Err err;
   std::string input("\nfoo bar  \n");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "string"), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::STRING, result.type());
   EXPECT_EQ(input, result.string_value());
 
   // Test with trimming.
   result = ConvertInputToValue(input, NULL, Value(NULL, "trim string"), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::STRING, result.type());
   EXPECT_EQ("foo bar", result.string_value());
 }
 
-TEST(InputConversion, ListLines) {
+TEST_F(InputConversionTest, ListLines) {
   Err err;
   std::string input("\nfoo\nbar  \n\n");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "list lines"),
                                      &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::LIST, result.type());
   ASSERT_EQ(4u, result.list_value().size());
   EXPECT_EQ("",    result.list_value()[0].string_value());
   EXPECT_EQ("foo", result.list_value()[1].string_value());
   EXPECT_EQ("bar", result.list_value()[2].string_value());
   EXPECT_EQ("",    result.list_value()[3].string_value());
 
   // Test with trimming.
   result = ConvertInputToValue(input, NULL, Value(NULL, "trim list lines"),
                                &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::LIST, result.type());
   ASSERT_EQ(2u, result.list_value().size());
   EXPECT_EQ("foo", result.list_value()[0].string_value());
   EXPECT_EQ("bar", result.list_value()[1].string_value());
 }
 
-TEST(InputConversion, ValueString) {
+TEST_F(InputConversionTest, ValueString) {
   Err err;
   std::string input("\"str\"");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::STRING, result.type());
   EXPECT_EQ("str", result.string_value());
 }
 
-TEST(InputConversion, ValueInt) {
+TEST_F(InputConversionTest, ValueInt) {
   Err err;
   std::string input("\n\n  6 \n ");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::INTEGER, result.type());
   EXPECT_EQ(6, result.int_value());
 }
 
-TEST(InputConversion, ValueList) {
+TEST_F(InputConversionTest, ValueList) {
   Err err;
   std::string input("\n [ \"a\", 5]");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_FALSE(err.has_error());
   ASSERT_EQ(Value::LIST, result.type());
   ASSERT_EQ(2u, result.list_value().size());
   EXPECT_EQ("a", result.list_value()[0].string_value());
   EXPECT_EQ(5,   result.list_value()[1].int_value());
 }
 
-TEST(InputConversion, ValueEmpty) {
+TEST_F(InputConversionTest, ValueDict) {
+  Err err;
+  std::string input("\n a = 5 b = \"foo\" c = a + 2");
+  Value result = ConvertInputToValue(input, NULL, Value(NULL, "scope"), &err);
+  EXPECT_FALSE(err.has_error());
+  ASSERT_EQ(Value::DICT, result.type());
+  ASSERT_EQ(3u, result.dict_value().size());
+  EXPECT_EQ(5, result.dict_value()["a"].int_value());
+  EXPECT_EQ("foo", result.dict_value()["b"].string_value());
+  EXPECT_EQ(7, result.dict_value()["c"].int_value());
+
+  // Tests that when we get Values out of the input conversion, the resulting
+  // values have an origin set to something corresponding to the input.
+  Value a = result.dict_value()["a"];
+  const ParseNode* a_origin = a.origin();
+  ASSERT_TRUE(a_origin);
+  LocationRange a_range = a_origin->GetRange();
+  EXPECT_EQ(2, a_range.begin().line_number());
+  EXPECT_EQ(6, a_range.begin().char_offset());
+
+  const InputFile* a_file = a_range.begin().file();
+  EXPECT_EQ(input, a_file->contents());
+}
+
+TEST_F(InputConversionTest, ValueEmpty) {
   Err err;
   Value result = ConvertInputToValue("", NULL, Value(NULL, "value"), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::NONE, result.type());
 }
 
-TEST(InputConversion, ValueError) {
+TEST_F(InputConversionTest, ValueError) {
   Err err;
   std::string input("\n [ \"a\", 5\nfoo bar");
   Value result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_TRUE(err.has_error());
 
   // Blocks not allowed.
   input = "{ foo = 5 }";
   result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_TRUE(err.has_error());
 
   // Function calls not allowed.
   input = "print(5)";
   result = ConvertInputToValue(input, NULL, Value(NULL, "value"), &err);
   EXPECT_TRUE(err.has_error());
 }
 
 // Passing none or the empty string for input conversion should ignore the
 // result.
-TEST(InputConversion, Ignore) {
+TEST_F(InputConversionTest, Ignore) {
   Err err;
   Value result = ConvertInputToValue("foo", NULL, Value(), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::NONE, result.type());
 
   result = ConvertInputToValue("foo", NULL, Value(NULL, ""), &err);
   EXPECT_FALSE(err.has_error());
   EXPECT_EQ(Value::NONE, result.type());
 }