Add initial prototype for the GN meta-buildsystem.

tools/gn/input_conversion_unittest.cc

Index: tools/gn/input_conversion_unittest.cc
diff --git a/tools/gn/input_conversion_unittest.cc b/tools/gn/input_conversion_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..59c012344c9cb06f0898602749db8943d3e57358
--- /dev/null
+++ b/tools/gn/input_conversion_unittest.cc
@@ -0,0 +1,81 @@
+// 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/value.h"
+
+TEST(InputConversion, 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(InputConversion, ListLines) {
+  Err err;
+  std::string input("\nfoo\nbar  \n");
+  Value result = ConvertInputToValue(input, NULL, Value(NULL, "list lines"),
+                                     &err);
+  EXPECT_FALSE(err.has_error());
+  EXPECT_EQ(Value::LIST, result.type());
+  ASSERT_EQ(3u, 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());
+}
+
+TEST(InputConversion, 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) {
+  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) {
+  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) {
+  Err err;
+  ConvertInputToValue("", NULL, Value(NULL, "value"), &err);
+}
+
+TEST(InputConversion, 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());
+}