Added the unit test for the nested message.

test/proto/nested_message.proto

@@ -17,3 +17,7 @@ message message_b
   message_a nested_a = 3;
 }
 
+message message_c 
+{
+  message_b nested_b = 1;
+}

test/test_NestedMessage.cpp

@@ -0,0 +1,153 @@
+
+
+#include "gtest/gtest.h"
+
+#include <WireFormatter.h>
+#include <MessageBufferMock.h>
+
+#include <cstdint>    
+#include <limits> 
+
+// EAMS message definitions
+#include <nested_message.h>
+
+using ::testing::_;
+using ::testing::InSequence;
+using ::testing::Return;
+using ::testing::SetArgReferee;
+
+namespace test_EmbeddedAMS_NestedMessage
+{
+
+TEST(NestedMessage, serialize_zero) 
+{
+  // Test if a unset message results in zero bytes in the buffer.
+
+  ::message_b msg;
+  Mocks::MessageBufferMock buffer;
+  EXPECT_CALL(buffer, push(_)).Times(0);
+  EXPECT_CALL(buffer, push(_,_)).Times(0);
+  EXPECT_CALL(buffer, get_available_size()).Times(1).WillOnce(Return(99));
+
+  EXPECT_TRUE(msg.serialize(buffer));
+
+  EXPECT_EQ(0, msg.serialized_size());
+}
+
+TEST(NestedMessage, serialize_one) 
+{
+  InSequence s;
+
+  ::message_b msg;
+  Mocks::MessageBufferMock buffer;
+
+  // Test if a nested message can be serialized with values set to one.
+  msg.set_u(1.0F);
+  msg.set_v(1.0F);
+  msg.mutable_nested_a().set_x(1U);
+  msg.mutable_nested_a().set_y(1.0F);
+  msg.mutable_nested_a().set_z(1);
+
+  uint8_t expected_uv[] = {0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F, // u
+                           0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x3F};//, // v
+
+  for(auto e : expected_uv) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+  // When called the buffer will have enough space for the message
+  EXPECT_CALL(buffer, get_available_size()).Times(1).WillOnce(Return(9));
+
+  uint8_t expected_a[] = {0x1a, 0x09, // tag and size of nested a
+                          0x08, 0x01, // x
+                          0x15, 0x00, 0x00, 0x80, 0x3f, // y
+                          0x18, 0x02}; // z
+
+  for(auto e : expected_a) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+
+  EXPECT_TRUE(msg.serialize(buffer));
+
+  EXPECT_EQ(29, msg.serialized_size());
+}
+
+TEST(NestedMessage, serialize_max) 
+{
+  InSequence s;
+
+  ::message_b msg;
+  Mocks::MessageBufferMock buffer;
+
+  // Test if a nested message can be serialized with values set to one.
+  msg.set_u(std::numeric_limits<double>::max());
+  msg.set_v(std::numeric_limits<double>::max());
+  msg.mutable_nested_a().set_x(std::numeric_limits<int32_t>::max());
+  msg.mutable_nested_a().set_y(std::numeric_limits<float>::max());
+  msg.mutable_nested_a().set_z(std::numeric_limits<int64_t>::max());
+
+  uint8_t expected_b[] = {0x09, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEF, 0x7F, // u
+                          0x11, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEF, 0x7F};//, // v
+
+  for(auto e : expected_b) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+  // When called the buffer will have enough space for the message
+  EXPECT_CALL(buffer, get_available_size()).Times(1).WillOnce(Return(22));
+
+  uint8_t expected_a[] = {0x1A, 0x16, // tag and size of nested a
+                          0x08, 0xFF, 0xFF, 0xFF, 0xFF, 0x07, // x
+                          0x15, 0xFF, 0xFF, 0x7F, 0x7F, // y
+                          0x18, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01}; // z
+
+  for(auto e : expected_a) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+  EXPECT_TRUE(msg.serialize(buffer));
+
+  EXPECT_EQ(42, msg.serialized_size());
+}
+
+TEST(NestedMessage, serialize_nested_in_nested_max) 
+{
+  InSequence s;
+
+  ::message_c msg;
+  Mocks::MessageBufferMock buffer;
+
+  // Test if a nested message in a nested message with some data works.
+  msg.mutable_nested_b().set_u(std::numeric_limits<double>::max());
+  msg.mutable_nested_b().set_v(std::numeric_limits<double>::max());
+  msg.mutable_nested_b().mutable_nested_a().set_x(std::numeric_limits<int32_t>::max());
+  msg.mutable_nested_b().mutable_nested_a().set_y(std::numeric_limits<float>::max());
+  msg.mutable_nested_b().mutable_nested_a().set_z(std::numeric_limits<int64_t>::max());
+
+  EXPECT_CALL(buffer, get_available_size()).Times(1).WillOnce(Return(42));
+
+  uint8_t expected_b[] = {0x0A, 0x2A, // tag and size of nested b
+                          0x09, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEF, 0x7F, // u
+                          0x11, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xEF, 0x7F};//, // v
+
+  for(auto e : expected_b) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+  // When called the buffer will have enough space for the message
+  EXPECT_CALL(buffer, get_available_size()).Times(1).WillOnce(Return(22));
+
+  uint8_t expected_a[] = {0x1A, 0x16, // tag and size of nested a
+                          0x08, 0xFF, 0xFF, 0xFF, 0xFF, 0x07, // x
+                          0x15, 0xFF, 0xFF, 0x7F, 0x7F, // y
+                          0x18, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01}; // z
+
+  for(auto e : expected_a) {
+    EXPECT_CALL(buffer, push(e)).Times(1).WillOnce(Return(true));
+  }
+
+  EXPECT_TRUE(msg.serialize(buffer));
+}
+
+} // End of namespace test_EmbeddedAMS_NestedMessage