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      1 // Copyright (c) 2012 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 "dbus/message.h"
      6 
      7 #include "base/basictypes.h"
      8 #include "base/logging.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/posix/eintr_wrapper.h"
     11 #include "dbus/object_path.h"
     12 #include "dbus/test_proto.pb.h"
     13 #include "testing/gtest/include/gtest/gtest.h"
     14 
     15 namespace dbus {
     16 
     17 // Test that a byte can be properly written and read. We only have this
     18 // test for byte, as repeating this for other basic types is too redundant.
     19 TEST(MessageTest, AppendAndPopByte) {
     20   scoped_ptr<Response> message(Response::CreateEmpty());
     21   MessageWriter writer(message.get());
     22   writer.AppendByte(123);  // The input is 123.
     23 
     24   MessageReader reader(message.get());
     25   ASSERT_TRUE(reader.HasMoreData());  // Should have data to read.
     26   ASSERT_EQ(Message::BYTE, reader.GetDataType());
     27 
     28   bool bool_value = false;
     29   // Should fail as the type is not bool here.
     30   ASSERT_FALSE(reader.PopBool(&bool_value));
     31 
     32   uint8 byte_value = 0;
     33   ASSERT_TRUE(reader.PopByte(&byte_value));
     34   EXPECT_EQ(123, byte_value);  // Should match with the input.
     35   ASSERT_FALSE(reader.HasMoreData());  // Should not have more data to read.
     36 
     37   // Try to get another byte. Should fail.
     38   ASSERT_FALSE(reader.PopByte(&byte_value));
     39 }
     40 
     41 // Check all basic types can be properly written and read.
     42 TEST(MessageTest, AppendAndPopBasicDataTypes) {
     43   scoped_ptr<Response> message(Response::CreateEmpty());
     44   MessageWriter writer(message.get());
     45 
     46   // Append 0, 1, 2, 3, 4, 5, 6, 7, 8, "string", "/object/path".
     47   writer.AppendByte(0);
     48   writer.AppendBool(true);
     49   writer.AppendInt16(2);
     50   writer.AppendUint16(3);
     51   writer.AppendInt32(4);
     52   writer.AppendUint32(5);
     53   writer.AppendInt64(6);
     54   writer.AppendUint64(7);
     55   writer.AppendDouble(8.0);
     56   writer.AppendString("string");
     57   writer.AppendObjectPath(ObjectPath("/object/path"));
     58 
     59   uint8 byte_value = 0;
     60   bool bool_value = false;
     61   int16 int16_value = 0;
     62   uint16 uint16_value = 0;
     63   int32 int32_value = 0;
     64   uint32 uint32_value = 0;
     65   int64 int64_value = 0;
     66   uint64 uint64_value = 0;
     67   double double_value = 0;
     68   std::string string_value;
     69   ObjectPath object_path_value;
     70 
     71   MessageReader reader(message.get());
     72   ASSERT_TRUE(reader.HasMoreData());
     73   ASSERT_TRUE(reader.PopByte(&byte_value));
     74   ASSERT_TRUE(reader.PopBool(&bool_value));
     75   ASSERT_TRUE(reader.PopInt16(&int16_value));
     76   ASSERT_TRUE(reader.PopUint16(&uint16_value));
     77   ASSERT_TRUE(reader.PopInt32(&int32_value));
     78   ASSERT_TRUE(reader.PopUint32(&uint32_value));
     79   ASSERT_TRUE(reader.PopInt64(&int64_value));
     80   ASSERT_TRUE(reader.PopUint64(&uint64_value));
     81   ASSERT_TRUE(reader.PopDouble(&double_value));
     82   ASSERT_TRUE(reader.PopString(&string_value));
     83   ASSERT_TRUE(reader.PopObjectPath(&object_path_value));
     84   ASSERT_FALSE(reader.HasMoreData());
     85 
     86   // 0, 1, 2, 3, 4, 5, 6, 7, 8, "string", "/object/path" should be returned.
     87   EXPECT_EQ(0, byte_value);
     88   EXPECT_EQ(true, bool_value);
     89   EXPECT_EQ(2, int16_value);
     90   EXPECT_EQ(3U, uint16_value);
     91   EXPECT_EQ(4, int32_value);
     92   EXPECT_EQ(5U, uint32_value);
     93   EXPECT_EQ(6, int64_value);
     94   EXPECT_EQ(7U, uint64_value);
     95   EXPECT_DOUBLE_EQ(8.0, double_value);
     96   EXPECT_EQ("string", string_value);
     97   EXPECT_EQ(ObjectPath("/object/path"), object_path_value);
     98 }
     99 
    100 // Check all basic types can be properly written and read.
    101 TEST(MessageTest, AppendAndPopFileDescriptor) {
    102   if (!IsDBusTypeUnixFdSupported()) {
    103     LOG(WARNING) << "FD passing is not supported";
    104     return;
    105   }
    106 
    107   scoped_ptr<Response> message(Response::CreateEmpty());
    108   MessageWriter writer(message.get());
    109 
    110   // Append stdout.
    111   FileDescriptor temp(1);
    112   // Descriptor should not be valid until checked.
    113   ASSERT_FALSE(temp.is_valid());
    114   // NB: thread IO requirements not relevant for unit tests.
    115   temp.CheckValidity();
    116   ASSERT_TRUE(temp.is_valid());
    117   writer.AppendFileDescriptor(temp);
    118 
    119   FileDescriptor fd_value;
    120 
    121   MessageReader reader(message.get());
    122   ASSERT_TRUE(reader.HasMoreData());
    123   ASSERT_TRUE(reader.PopFileDescriptor(&fd_value));
    124   ASSERT_FALSE(reader.HasMoreData());
    125   // Descriptor is not valid until explicitly checked.
    126   ASSERT_FALSE(fd_value.is_valid());
    127   fd_value.CheckValidity();
    128   ASSERT_TRUE(fd_value.is_valid());
    129 
    130   // Stdout should be returned but we cannot check the descriptor
    131   // value because stdout will be dup'd.  Instead check st_rdev
    132   // which should be identical.
    133   struct stat sb_stdout;
    134   int status_stdout = HANDLE_EINTR(fstat(1, &sb_stdout));
    135   ASSERT_GE(status_stdout, 0);
    136   struct stat sb_fd;
    137   int status_fd = HANDLE_EINTR(fstat(fd_value.value(), &sb_fd));
    138   ASSERT_GE(status_fd, 0);
    139   EXPECT_EQ(sb_stdout.st_rdev, sb_fd.st_rdev);
    140 }
    141 
    142 // Check all variant types can be properly written and read.
    143 TEST(MessageTest, AppendAndPopVariantDataTypes) {
    144   scoped_ptr<Response> message(Response::CreateEmpty());
    145   MessageWriter writer(message.get());
    146 
    147   // Append 0, 1, 2, 3, 4, 5, 6, 7, 8, "string", "/object/path".
    148   writer.AppendVariantOfByte(0);
    149   writer.AppendVariantOfBool(true);
    150   writer.AppendVariantOfInt16(2);
    151   writer.AppendVariantOfUint16(3);
    152   writer.AppendVariantOfInt32(4);
    153   writer.AppendVariantOfUint32(5);
    154   writer.AppendVariantOfInt64(6);
    155   writer.AppendVariantOfUint64(7);
    156   writer.AppendVariantOfDouble(8.0);
    157   writer.AppendVariantOfString("string");
    158   writer.AppendVariantOfObjectPath(ObjectPath("/object/path"));
    159 
    160   uint8 byte_value = 0;
    161   bool bool_value = false;
    162   int16 int16_value = 0;
    163   uint16 uint16_value = 0;
    164   int32 int32_value = 0;
    165   uint32 uint32_value = 0;
    166   int64 int64_value = 0;
    167   uint64 uint64_value = 0;
    168   double double_value = 0;
    169   std::string string_value;
    170   ObjectPath object_path_value;
    171 
    172   MessageReader reader(message.get());
    173   ASSERT_TRUE(reader.HasMoreData());
    174   ASSERT_TRUE(reader.PopVariantOfByte(&byte_value));
    175   ASSERT_TRUE(reader.PopVariantOfBool(&bool_value));
    176   ASSERT_TRUE(reader.PopVariantOfInt16(&int16_value));
    177   ASSERT_TRUE(reader.PopVariantOfUint16(&uint16_value));
    178   ASSERT_TRUE(reader.PopVariantOfInt32(&int32_value));
    179   ASSERT_TRUE(reader.PopVariantOfUint32(&uint32_value));
    180   ASSERT_TRUE(reader.PopVariantOfInt64(&int64_value));
    181   ASSERT_TRUE(reader.PopVariantOfUint64(&uint64_value));
    182   ASSERT_TRUE(reader.PopVariantOfDouble(&double_value));
    183   ASSERT_TRUE(reader.PopVariantOfString(&string_value));
    184   ASSERT_TRUE(reader.PopVariantOfObjectPath(&object_path_value));
    185   ASSERT_FALSE(reader.HasMoreData());
    186 
    187   // 0, 1, 2, 3, 4, 5, 6, 7, 8, "string", "/object/path" should be returned.
    188   EXPECT_EQ(0, byte_value);
    189   EXPECT_EQ(true, bool_value);
    190   EXPECT_EQ(2, int16_value);
    191   EXPECT_EQ(3U, uint16_value);
    192   EXPECT_EQ(4, int32_value);
    193   EXPECT_EQ(5U, uint32_value);
    194   EXPECT_EQ(6, int64_value);
    195   EXPECT_EQ(7U, uint64_value);
    196   EXPECT_DOUBLE_EQ(8.0, double_value);
    197   EXPECT_EQ("string", string_value);
    198   EXPECT_EQ(ObjectPath("/object/path"), object_path_value);
    199 }
    200 
    201 TEST(MessageTest, ArrayOfBytes) {
    202   scoped_ptr<Response> message(Response::CreateEmpty());
    203   MessageWriter writer(message.get());
    204   std::vector<uint8> bytes;
    205   bytes.push_back(1);
    206   bytes.push_back(2);
    207   bytes.push_back(3);
    208   writer.AppendArrayOfBytes(bytes.data(), bytes.size());
    209 
    210   MessageReader reader(message.get());
    211   uint8* output_bytes = NULL;
    212   size_t length = 0;
    213   ASSERT_TRUE(reader.PopArrayOfBytes(&output_bytes, &length));
    214   ASSERT_FALSE(reader.HasMoreData());
    215   ASSERT_EQ(3U, length);
    216   EXPECT_EQ(1, output_bytes[0]);
    217   EXPECT_EQ(2, output_bytes[1]);
    218   EXPECT_EQ(3, output_bytes[2]);
    219 }
    220 
    221 TEST(MessageTest, ArrayOfBytes_Empty) {
    222   scoped_ptr<Response> message(Response::CreateEmpty());
    223   MessageWriter writer(message.get());
    224   std::vector<uint8> bytes;
    225   writer.AppendArrayOfBytes(bytes.data(), bytes.size());
    226 
    227   MessageReader reader(message.get());
    228   uint8* output_bytes = NULL;
    229   size_t length = 0;
    230   ASSERT_TRUE(reader.PopArrayOfBytes(&output_bytes, &length));
    231   ASSERT_FALSE(reader.HasMoreData());
    232   ASSERT_EQ(0U, length);
    233   EXPECT_EQ(NULL, output_bytes);
    234 }
    235 
    236 TEST(MessageTest, ArrayOfStrings) {
    237   scoped_ptr<Response> message(Response::CreateEmpty());
    238   MessageWriter writer(message.get());
    239   std::vector<std::string> strings;
    240   strings.push_back("fee");
    241   strings.push_back("fie");
    242   strings.push_back("foe");
    243   strings.push_back("fum");
    244   writer.AppendArrayOfStrings(strings);
    245 
    246   MessageReader reader(message.get());
    247   std::vector<std::string> output_strings;
    248   ASSERT_TRUE(reader.PopArrayOfStrings(&output_strings));
    249   ASSERT_FALSE(reader.HasMoreData());
    250   ASSERT_EQ(4U, output_strings.size());
    251   EXPECT_EQ("fee", output_strings[0]);
    252   EXPECT_EQ("fie", output_strings[1]);
    253   EXPECT_EQ("foe", output_strings[2]);
    254   EXPECT_EQ("fum", output_strings[3]);
    255 }
    256 
    257 TEST(MessageTest, ArrayOfObjectPaths) {
    258   scoped_ptr<Response> message(Response::CreateEmpty());
    259   MessageWriter writer(message.get());
    260   std::vector<ObjectPath> object_paths;
    261   object_paths.push_back(ObjectPath("/object/path/1"));
    262   object_paths.push_back(ObjectPath("/object/path/2"));
    263   object_paths.push_back(ObjectPath("/object/path/3"));
    264   writer.AppendArrayOfObjectPaths(object_paths);
    265 
    266   MessageReader reader(message.get());
    267   std::vector<ObjectPath> output_object_paths;
    268   ASSERT_TRUE(reader.PopArrayOfObjectPaths(&output_object_paths));
    269   ASSERT_FALSE(reader.HasMoreData());
    270   ASSERT_EQ(3U, output_object_paths.size());
    271   EXPECT_EQ(ObjectPath("/object/path/1"), output_object_paths[0]);
    272   EXPECT_EQ(ObjectPath("/object/path/2"), output_object_paths[1]);
    273   EXPECT_EQ(ObjectPath("/object/path/3"), output_object_paths[2]);
    274 }
    275 
    276 TEST(MessageTest, ProtoBuf) {
    277   scoped_ptr<Response> message(Response::CreateEmpty());
    278   MessageWriter writer(message.get());
    279   TestProto send_message;
    280   send_message.set_text("testing");
    281   send_message.set_number(123);
    282   writer.AppendProtoAsArrayOfBytes(send_message);
    283 
    284   MessageReader reader(message.get());
    285   TestProto receive_message;
    286   ASSERT_TRUE(reader.PopArrayOfBytesAsProto(&receive_message));
    287   EXPECT_EQ(receive_message.text(), send_message.text());
    288   EXPECT_EQ(receive_message.number(), send_message.number());
    289 }
    290 
    291 
    292 // Test that an array can be properly written and read. We only have this
    293 // test for array, as repeating this for other container types is too
    294 // redundant.
    295 TEST(MessageTest, OpenArrayAndPopArray) {
    296   scoped_ptr<Response> message(Response::CreateEmpty());
    297   MessageWriter writer(message.get());
    298   MessageWriter array_writer(NULL);
    299   writer.OpenArray("s", &array_writer);  // Open an array of strings.
    300   array_writer.AppendString("foo");
    301   array_writer.AppendString("bar");
    302   array_writer.AppendString("baz");
    303   writer.CloseContainer(&array_writer);
    304 
    305   MessageReader reader(message.get());
    306   ASSERT_EQ(Message::ARRAY, reader.GetDataType());
    307   MessageReader array_reader(NULL);
    308   ASSERT_TRUE(reader.PopArray(&array_reader));
    309   ASSERT_FALSE(reader.HasMoreData());  // Should not have more data to read.
    310 
    311   std::string string_value;
    312   ASSERT_TRUE(array_reader.PopString(&string_value));
    313   EXPECT_EQ("foo", string_value);
    314   ASSERT_TRUE(array_reader.PopString(&string_value));
    315   EXPECT_EQ("bar", string_value);
    316   ASSERT_TRUE(array_reader.PopString(&string_value));
    317   EXPECT_EQ("baz", string_value);
    318   // Should not have more data to read.
    319   ASSERT_FALSE(array_reader.HasMoreData());
    320 }
    321 
    322 // Create a complex message using array, struct, variant, dict entry, and
    323 // make sure it can be read properly.
    324 TEST(MessageTest, CreateComplexMessageAndReadIt) {
    325   scoped_ptr<Response> message(Response::CreateEmpty());
    326   MessageWriter writer(message.get());
    327   {
    328     MessageWriter array_writer(NULL);
    329     // Open an array of variants.
    330     writer.OpenArray("v", &array_writer);
    331     {
    332       // The first value in the array.
    333       {
    334         MessageWriter variant_writer(NULL);
    335         // Open a variant of a boolean.
    336         array_writer.OpenVariant("b", &variant_writer);
    337         variant_writer.AppendBool(true);
    338         array_writer.CloseContainer(&variant_writer);
    339       }
    340 
    341       // The second value in the array.
    342       {
    343         MessageWriter variant_writer(NULL);
    344         // Open a variant of a struct that contains a string and an int32.
    345         array_writer.OpenVariant("(si)", &variant_writer);
    346         {
    347           MessageWriter struct_writer(NULL);
    348           variant_writer.OpenStruct(&struct_writer);
    349           struct_writer.AppendString("string");
    350           struct_writer.AppendInt32(123);
    351           variant_writer.CloseContainer(&struct_writer);
    352         }
    353         array_writer.CloseContainer(&variant_writer);
    354       }
    355 
    356       // The third value in the array.
    357       {
    358         MessageWriter variant_writer(NULL);
    359         // Open a variant of an array of string-to-int64 dict entries.
    360         array_writer.OpenVariant("a{sx}", &variant_writer);
    361         {
    362           // Opens an array of string-to-int64 dict entries.
    363           MessageWriter dict_array_writer(NULL);
    364           variant_writer.OpenArray("{sx}", &dict_array_writer);
    365           {
    366             // Opens a string-to-int64 dict entries.
    367             MessageWriter dict_entry_writer(NULL);
    368             dict_array_writer.OpenDictEntry(&dict_entry_writer);
    369             dict_entry_writer.AppendString("foo");
    370             dict_entry_writer.AppendInt64(GG_INT64_C(1234567890123456789));
    371             dict_array_writer.CloseContainer(&dict_entry_writer);
    372           }
    373           variant_writer.CloseContainer(&dict_array_writer);
    374         }
    375         array_writer.CloseContainer(&variant_writer);
    376       }
    377     }
    378     writer.CloseContainer(&array_writer);
    379   }
    380   // What we have created looks like this:
    381   EXPECT_EQ("message_type: MESSAGE_METHOD_RETURN\n"
    382             "signature: av\n"
    383             "\n"
    384             "array [\n"
    385             "  variant     bool true\n"
    386             "  variant     struct {\n"
    387             "      string \"string\"\n"
    388             "      int32 123\n"
    389             "    }\n"
    390             "  variant     array [\n"
    391             "      dict entry {\n"
    392             "        string \"foo\"\n"
    393             "        int64 1234567890123456789\n"
    394             "      }\n"
    395             "    ]\n"
    396             "]\n",
    397             message->ToString());
    398 
    399   MessageReader reader(message.get());
    400   MessageReader array_reader(NULL);
    401   ASSERT_TRUE(reader.PopArray(&array_reader));
    402 
    403   // The first value in the array.
    404   bool bool_value = false;
    405   ASSERT_TRUE(array_reader.PopVariantOfBool(&bool_value));
    406   EXPECT_EQ(true, bool_value);
    407 
    408   // The second value in the array.
    409   {
    410     MessageReader variant_reader(NULL);
    411     ASSERT_TRUE(array_reader.PopVariant(&variant_reader));
    412     {
    413       MessageReader struct_reader(NULL);
    414       ASSERT_TRUE(variant_reader.PopStruct(&struct_reader));
    415       std::string string_value;
    416       ASSERT_TRUE(struct_reader.PopString(&string_value));
    417       EXPECT_EQ("string", string_value);
    418       int32 int32_value = 0;
    419       ASSERT_TRUE(struct_reader.PopInt32(&int32_value));
    420       EXPECT_EQ(123, int32_value);
    421       ASSERT_FALSE(struct_reader.HasMoreData());
    422     }
    423     ASSERT_FALSE(variant_reader.HasMoreData());
    424   }
    425 
    426   // The third value in the array.
    427   {
    428     MessageReader variant_reader(NULL);
    429     ASSERT_TRUE(array_reader.PopVariant(&variant_reader));
    430     {
    431       MessageReader dict_array_reader(NULL);
    432       ASSERT_TRUE(variant_reader.PopArray(&dict_array_reader));
    433       {
    434         MessageReader dict_entry_reader(NULL);
    435         ASSERT_TRUE(dict_array_reader.PopDictEntry(&dict_entry_reader));
    436         std::string string_value;
    437         ASSERT_TRUE(dict_entry_reader.PopString(&string_value));
    438         EXPECT_EQ("foo", string_value);
    439         int64 int64_value = 0;
    440         ASSERT_TRUE(dict_entry_reader.PopInt64(&int64_value));
    441         EXPECT_EQ(GG_INT64_C(1234567890123456789), int64_value);
    442       }
    443       ASSERT_FALSE(dict_array_reader.HasMoreData());
    444     }
    445     ASSERT_FALSE(variant_reader.HasMoreData());
    446   }
    447   ASSERT_FALSE(array_reader.HasMoreData());
    448   ASSERT_FALSE(reader.HasMoreData());
    449 }
    450 
    451 TEST(MessageTest, MethodCall) {
    452   MethodCall method_call("com.example.Interface", "SomeMethod");
    453   EXPECT_TRUE(method_call.raw_message() != NULL);
    454   EXPECT_EQ(Message::MESSAGE_METHOD_CALL, method_call.GetMessageType());
    455   EXPECT_EQ("MESSAGE_METHOD_CALL", method_call.GetMessageTypeAsString());
    456   method_call.SetDestination("com.example.Service");
    457   method_call.SetPath(ObjectPath("/com/example/Object"));
    458 
    459   MessageWriter writer(&method_call);
    460   writer.AppendString("payload");
    461 
    462   EXPECT_EQ("message_type: MESSAGE_METHOD_CALL\n"
    463             "destination: com.example.Service\n"
    464             "path: /com/example/Object\n"
    465             "interface: com.example.Interface\n"
    466             "member: SomeMethod\n"
    467             "signature: s\n"
    468             "\n"
    469             "string \"payload\"\n",
    470             method_call.ToString());
    471 }
    472 
    473 TEST(MessageTest, MethodCall_FromRawMessage) {
    474   DBusMessage* raw_message = dbus_message_new(DBUS_MESSAGE_TYPE_METHOD_CALL);
    475   dbus_message_set_interface(raw_message, "com.example.Interface");
    476   dbus_message_set_member(raw_message, "SomeMethod");
    477 
    478   scoped_ptr<MethodCall> method_call(MethodCall::FromRawMessage(raw_message));
    479   EXPECT_EQ("com.example.Interface", method_call->GetInterface());
    480   EXPECT_EQ("SomeMethod", method_call->GetMember());
    481 }
    482 
    483 TEST(MessageTest, Signal) {
    484   Signal signal("com.example.Interface", "SomeSignal");
    485   EXPECT_TRUE(signal.raw_message() != NULL);
    486   EXPECT_EQ(Message::MESSAGE_SIGNAL, signal.GetMessageType());
    487   EXPECT_EQ("MESSAGE_SIGNAL", signal.GetMessageTypeAsString());
    488   signal.SetPath(ObjectPath("/com/example/Object"));
    489 
    490   MessageWriter writer(&signal);
    491   writer.AppendString("payload");
    492 
    493   EXPECT_EQ("message_type: MESSAGE_SIGNAL\n"
    494             "path: /com/example/Object\n"
    495             "interface: com.example.Interface\n"
    496             "member: SomeSignal\n"
    497             "signature: s\n"
    498             "\n"
    499             "string \"payload\"\n",
    500             signal.ToString());
    501 }
    502 
    503 TEST(MessageTest, Signal_FromRawMessage) {
    504   DBusMessage* raw_message = dbus_message_new(DBUS_MESSAGE_TYPE_SIGNAL);
    505   dbus_message_set_interface(raw_message, "com.example.Interface");
    506   dbus_message_set_member(raw_message, "SomeSignal");
    507 
    508   scoped_ptr<Signal> signal(Signal::FromRawMessage(raw_message));
    509   EXPECT_EQ("com.example.Interface", signal->GetInterface());
    510   EXPECT_EQ("SomeSignal", signal->GetMember());
    511 }
    512 
    513 TEST(MessageTest, Response) {
    514   scoped_ptr<Response> response(Response::CreateEmpty());
    515   EXPECT_TRUE(response->raw_message());
    516   EXPECT_EQ(Message::MESSAGE_METHOD_RETURN, response->GetMessageType());
    517   EXPECT_EQ("MESSAGE_METHOD_RETURN", response->GetMessageTypeAsString());
    518 }
    519 
    520 TEST(MessageTest, Response_FromMethodCall) {
    521   const uint32 kSerial = 123;
    522   MethodCall method_call("com.example.Interface", "SomeMethod");
    523   method_call.SetSerial(kSerial);
    524 
    525   scoped_ptr<Response> response(
    526       Response::FromMethodCall(&method_call));
    527   EXPECT_EQ(Message::MESSAGE_METHOD_RETURN, response->GetMessageType());
    528   EXPECT_EQ("MESSAGE_METHOD_RETURN", response->GetMessageTypeAsString());
    529   // The serial should be copied to the reply serial.
    530   EXPECT_EQ(kSerial, response->GetReplySerial());
    531 }
    532 
    533 TEST(MessageTest, ErrorResponse_FromMethodCall) {
    534   const uint32 kSerial = 123;
    535 const char kErrorMessage[] = "error message";
    536 
    537   MethodCall method_call("com.example.Interface", "SomeMethod");
    538   method_call.SetSerial(kSerial);
    539 
    540   scoped_ptr<ErrorResponse> error_response(
    541       ErrorResponse::FromMethodCall(&method_call,
    542                                     DBUS_ERROR_FAILED,
    543                                     kErrorMessage));
    544   EXPECT_EQ(Message::MESSAGE_ERROR, error_response->GetMessageType());
    545   EXPECT_EQ("MESSAGE_ERROR", error_response->GetMessageTypeAsString());
    546   // The serial should be copied to the reply serial.
    547   EXPECT_EQ(kSerial, error_response->GetReplySerial());
    548 
    549   // Error message should be added to the payload.
    550   MessageReader reader(error_response.get());
    551   std::string error_message;
    552   ASSERT_TRUE(reader.PopString(&error_message));
    553   EXPECT_EQ(kErrorMessage, error_message);
    554 }
    555 
    556 TEST(MessageTest, GetAndSetHeaders) {
    557   scoped_ptr<Response> message(Response::CreateEmpty());
    558 
    559   EXPECT_EQ("", message->GetDestination());
    560   EXPECT_EQ(ObjectPath(std::string()), message->GetPath());
    561   EXPECT_EQ("", message->GetInterface());
    562   EXPECT_EQ("", message->GetMember());
    563   EXPECT_EQ("", message->GetErrorName());
    564   EXPECT_EQ("", message->GetSender());
    565   EXPECT_EQ(0U, message->GetSerial());
    566   EXPECT_EQ(0U, message->GetReplySerial());
    567 
    568   EXPECT_TRUE(message->SetDestination("org.chromium.destination"));
    569   EXPECT_TRUE(message->SetPath(ObjectPath("/org/chromium/path")));
    570   EXPECT_TRUE(message->SetInterface("org.chromium.interface"));
    571   EXPECT_TRUE(message->SetMember("member"));
    572   EXPECT_TRUE(message->SetErrorName("org.chromium.error"));
    573   EXPECT_TRUE(message->SetSender(":1.2"));
    574   message->SetSerial(123);
    575   message->SetReplySerial(456);
    576 
    577   EXPECT_EQ("org.chromium.destination", message->GetDestination());
    578   EXPECT_EQ(ObjectPath("/org/chromium/path"), message->GetPath());
    579   EXPECT_EQ("org.chromium.interface", message->GetInterface());
    580   EXPECT_EQ("member", message->GetMember());
    581   EXPECT_EQ("org.chromium.error", message->GetErrorName());
    582   EXPECT_EQ(":1.2", message->GetSender());
    583   EXPECT_EQ(123U, message->GetSerial());
    584   EXPECT_EQ(456U, message->GetReplySerial());
    585 }
    586 
    587 TEST(MessageTest, SetInvalidHeaders) {
    588   scoped_ptr<Response> message(Response::CreateEmpty());
    589   EXPECT_EQ("", message->GetDestination());
    590   EXPECT_EQ(ObjectPath(std::string()), message->GetPath());
    591   EXPECT_EQ("", message->GetInterface());
    592   EXPECT_EQ("", message->GetMember());
    593   EXPECT_EQ("", message->GetErrorName());
    594   EXPECT_EQ("", message->GetSender());
    595 
    596   // Empty element between periods.
    597   EXPECT_FALSE(message->SetDestination("org..chromium"));
    598   // Trailing '/' is only allowed for the root path.
    599   EXPECT_FALSE(message->SetPath(ObjectPath("/org/chromium/")));
    600   // Interface name cannot contain '/'.
    601   EXPECT_FALSE(message->SetInterface("org/chromium/interface"));
    602   // Member name cannot begin with a digit.
    603   EXPECT_FALSE(message->SetMember("1member"));
    604   // Error name cannot begin with a period.
    605   EXPECT_FALSE(message->SetErrorName(".org.chromium.error"));
    606   // Disallowed characters.
    607   EXPECT_FALSE(message->SetSender("?!#*"));
    608 
    609   EXPECT_EQ("", message->GetDestination());
    610   EXPECT_EQ(ObjectPath(std::string()), message->GetPath());
    611   EXPECT_EQ("", message->GetInterface());
    612   EXPECT_EQ("", message->GetMember());
    613   EXPECT_EQ("", message->GetErrorName());
    614   EXPECT_EQ("", message->GetSender());
    615 }
    616 
    617 TEST(MessageTest, ToString_LongString) {
    618   const std::string kLongString(1000, 'o');
    619 
    620   scoped_ptr<Response> message(Response::CreateEmpty());
    621   MessageWriter writer(message.get());
    622   writer.AppendString(kLongString);
    623 
    624   ASSERT_EQ("message_type: MESSAGE_METHOD_RETURN\n"
    625             "signature: s\n\n"
    626             "string \"oooooooooooooooooooooooooooooooooooooooooooooooo"
    627             "oooooooooooooooooooooooooooooooooooooooooooooooooooo... "
    628             "(1000 bytes in total)\"\n",
    629             message->ToString());
    630 }
    631 
    632 }  // namespace dbus
    633