GN: Bug fixes in process_file_template

tools/gn/function_process_file_template_unittest.cc

+// Copyright 2014 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/functions.h"
+#include "tools/gn/test_with_scope.h"
+
+TEST(FunctionProcessFileTemplates, SingleString) {
+  TestWithScope setup;
+
+  std::vector<Value> args;
+
+  Value sources(NULL, Value::LIST);
+  sources.list_value().push_back(Value(NULL, "//src/foo.txt"));
+  args.push_back(sources);
+
+  Value expansion(NULL, "1234{{source_name_part}}5678");
+  args.push_back(expansion);
+
+  Err err;
+  Value result = functions::RunProcessFileTemplate(
+      setup.scope(), NULL, args, &err);
+  EXPECT_FALSE(err.has_error());
+
+  ASSERT_TRUE(result.type() == Value::LIST);
+  ASSERT_EQ(1u, result.list_value().size());
+  ASSERT_TRUE(result.list_value()[0].type() == Value::STRING);
+  ASSERT_EQ("1234foo5678", result.list_value()[0].string_value());
+}
+
+TEST(FunctionProcessFileTemplates, MultipleStrings) {
+  TestWithScope setup;
+
+  std::vector<Value> args;
+
+  Value sources(NULL, Value::LIST);
+  sources.list_value().push_back(Value(NULL, "//src/one.txt"));
+  sources.list_value().push_back(Value(NULL, "//src/two.txt"));
+  args.push_back(sources);
+
+  Value expansions(NULL, Value::LIST);
+  expansions.list_value().push_back(
+      Value(NULL, "1234{{source_name_part}}5678"));
+  expansions.list_value().push_back(
+      Value(NULL, "ABCD{{source_file_part}}EFGH"));
+  args.push_back(expansions);
+
+  Err err;
+  Value result = functions::RunProcessFileTemplate(
+      setup.scope(), NULL, args, &err);
+  EXPECT_FALSE(err.has_error());
+
+  ASSERT_TRUE(result.type() == Value::LIST);
+  ASSERT_EQ(4u, result.list_value().size());
+  ASSERT_TRUE(result.list_value()[0].type() == Value::STRING);
+  ASSERT_TRUE(result.list_value()[1].type() == Value::STRING);
+  ASSERT_TRUE(result.list_value()[2].type() == Value::STRING);
+  ASSERT_TRUE(result.list_value()[3].type() == Value::STRING);
+  ASSERT_EQ("1234one5678", result.list_value()[0].string_value());
+  ASSERT_EQ("ABCDone.txtEFGH", result.list_value()[1].string_value());
+  ASSERT_EQ("1234two5678", result.list_value()[2].string_value());
+  ASSERT_EQ("ABCDtwo.txtEFGH", result.list_value()[3].string_value());
+}