Refactor to use new version of OEM IPMI Handler

Using the new version of ipmi handler provide a higher level wrapper
over the same functionalities. It helps us parse the input and output to
have more control of the input/output we see.

Changes to note,
- All cmd are removed from the request data. That is automatically
  extracted now.

Tested:
Unit Test Passed.

All IPMI OEM command still works the same as before this change.

```
$ burn_my_bmc -command stage -image /tmp/test.txt -interface ipmipci
Set up ipmi flash updater with /flash/dummy
Received failure on delete: Received IPMI_CC: 255
Sending over the firmware image.
Find [0x1050 0x750]
bar0[0x94000000]
Upload to BMC 100% |Goooooooooooooooooooooooooooooooooooooooooooooooooooooooogle| Time: 00:00:00
Opening the verification file
Committing to /flash/verify to trigger service
Calling stat on /flash/verify session to check status
success
succeeded
```

Also tested gBMC Update workflow which worked fine.

Change-Id: Ib2bfeab0c2ec5aa72ede1ff457ef5f90e488053c
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/test/ipmi_stat_unittest.cpp b/test/ipmi_stat_unittest.cpp
index 6d4d7b2..ab091ad 100644
--- a/test/ipmi_stat_unittest.cpp
+++ b/test/ipmi_stat_unittest.cpp
@@ -1,3 +1,4 @@
+#include "helper.hpp"
 #include "ipmi.hpp"
 #include "manager_mock.hpp"
 
@@ -24,23 +25,18 @@
 {
     // There is a minimum blobId length of one character, this test verifies
     // we check that.
-
     ManagerMock mgr;
-    size_t dataLen;
-    uint8_t request[MAX_IPMI_BUFFER] = {0};
-    uint8_t reply[MAX_IPMI_BUFFER] = {0};
-    auto req = reinterpret_cast<struct BmcBlobStatTx*>(request);
+    std::vector<uint8_t> request;
+    struct BmcBlobStatTx req;
     std::string blobId = "abc";
 
-    req->cmd = static_cast<std::uint8_t>(BlobOEMCommands::bmcBlobStat);
-    req->crc = 0;
-    // length() doesn't include the nul-terminator.
-    std::memcpy(req + 1, blobId.c_str(), blobId.length());
+    req.crc = 0;
+    request.resize(sizeof(struct BmcBlobStatTx));
+    std::memcpy(request.data(), &req, sizeof(struct BmcBlobStatTx));
+    // Do not include the nul-terminator
+    request.insert(request.end(), blobId.begin(), blobId.end());
 
-    dataLen = sizeof(struct BmcBlobStatTx) + blobId.length();
-
-    EXPECT_EQ(IPMI_CC_REQ_DATA_LEN_INVALID,
-              statBlob(&mgr, request, reply, &dataLen));
+    EXPECT_EQ(ipmi::responseReqDataLenInvalid(), statBlob(&mgr, request));
 }
 
 TEST(BlobStatTest, RequestRejectedReturnsFailure)
@@ -48,26 +44,21 @@
     // The blobId is rejected for any reason.
 
     ManagerMock mgr;
-    size_t dataLen;
-    uint8_t request[MAX_IPMI_BUFFER] = {0};
-    uint8_t reply[MAX_IPMI_BUFFER] = {0};
-    auto req = reinterpret_cast<struct BmcBlobStatTx*>(request);
+    std::vector<uint8_t> request;
+    struct BmcBlobStatTx req;
     std::string blobId = "a";
 
-    req->cmd = static_cast<std::uint8_t>(BlobOEMCommands::bmcBlobStat);
-    req->crc = 0;
-    // length() doesn't include the nul-terminator, request buff is initialized
-    // to 0s
-    std::memcpy(req + 1, blobId.c_str(), blobId.length());
-
-    dataLen = sizeof(struct BmcBlobStatTx) + blobId.length() + 1;
+    req.crc = 0;
+    request.resize(sizeof(struct BmcBlobStatTx));
+    std::memcpy(request.data(), &req, sizeof(struct BmcBlobStatTx));
+    request.insert(request.end(), blobId.begin(), blobId.end());
+    request.emplace_back('\0');
 
     EXPECT_CALL(mgr, stat(Matcher<const std::string&>(StrEq(blobId)),
                           Matcher<BlobMeta*>(_)))
         .WillOnce(Return(false));
 
-    EXPECT_EQ(IPMI_CC_UNSPECIFIED_ERROR,
-              statBlob(&mgr, request, reply, &dataLen));
+    EXPECT_EQ(ipmi::responseUnspecifiedError(), statBlob(&mgr, request));
 }
 
 TEST(BlobStatTest, RequestSucceedsNoMetadata)
@@ -75,19 +66,15 @@
     // Stat request succeeeds but there were no metadata bytes.
 
     ManagerMock mgr;
-    size_t dataLen;
-    uint8_t request[MAX_IPMI_BUFFER] = {0};
-    uint8_t reply[MAX_IPMI_BUFFER] = {0};
-    auto req = reinterpret_cast<struct BmcBlobStatTx*>(request);
+    std::vector<uint8_t> request;
+    struct BmcBlobStatTx req;
     std::string blobId = "a";
 
-    req->cmd = static_cast<std::uint8_t>(BlobOEMCommands::bmcBlobStat);
-    req->crc = 0;
-    // length() doesn't include the nul-terminator, request buff is initialized
-    // to 0s
-    std::memcpy(req + 1, blobId.c_str(), blobId.length());
-
-    dataLen = sizeof(struct BmcBlobStatTx) + blobId.length() + 1;
+    req.crc = 0;
+    request.resize(sizeof(struct BmcBlobStatTx));
+    std::memcpy(request.data(), &req, sizeof(struct BmcBlobStatTx));
+    request.insert(request.end(), blobId.begin(), blobId.end());
+    request.emplace_back('\0');
 
     struct BmcBlobStatRx rep;
     rep.crc = 0x00;
@@ -106,10 +93,10 @@
             return true;
         }));
 
-    EXPECT_EQ(IPMI_CC_OK, statBlob(&mgr, request, reply, &dataLen));
+    auto result = validateReply(statBlob(&mgr, request));
 
-    EXPECT_EQ(sizeof(rep), dataLen);
-    EXPECT_EQ(0, std::memcmp(reply, &rep, sizeof(rep)));
+    EXPECT_EQ(sizeof(rep), result.size());
+    EXPECT_EQ(0, std::memcmp(result.data(), &rep, sizeof(rep)));
 }
 
 TEST(BlobStatTest, RequestSucceedsWithMetadata)
@@ -117,19 +104,15 @@
     // Stat request succeeds and there were metadata bytes.
 
     ManagerMock mgr;
-    size_t dataLen;
-    uint8_t request[MAX_IPMI_BUFFER] = {0};
-    uint8_t reply[MAX_IPMI_BUFFER] = {0};
-    auto req = reinterpret_cast<struct BmcBlobStatTx*>(request);
+    std::vector<uint8_t> request;
+    struct BmcBlobStatTx req;
     std::string blobId = "a";
 
-    req->cmd = static_cast<std::uint8_t>(BlobOEMCommands::bmcBlobStat);
-    req->crc = 0;
-    // length() doesn't include the nul-terminator, request buff is initialized
-    // to 0s
-    std::memcpy(req + 1, blobId.c_str(), blobId.length());
-
-    dataLen = sizeof(struct BmcBlobStatTx) + blobId.length() + 1;
+    req.crc = 0;
+    request.resize(sizeof(struct BmcBlobStatTx));
+    std::memcpy(request.data(), &req, sizeof(struct BmcBlobStatTx));
+    request.insert(request.end(), blobId.begin(), blobId.end());
+    request.emplace_back('\0');
 
     BlobMeta lmeta;
     lmeta.blobState = 0x01;
@@ -152,11 +135,11 @@
             return true;
         }));
 
-    EXPECT_EQ(IPMI_CC_OK, statBlob(&mgr, request, reply, &dataLen));
+    auto result = validateReply(statBlob(&mgr, request));
 
-    EXPECT_EQ(sizeof(rep) + lmeta.metadata.size(), dataLen);
-    EXPECT_EQ(0, std::memcmp(reply, &rep, sizeof(rep)));
-    EXPECT_EQ(0, std::memcmp(reply + sizeof(rep), lmeta.metadata.data(),
+    EXPECT_EQ(sizeof(rep) + lmeta.metadata.size(), result.size());
+    EXPECT_EQ(0, std::memcmp(result.data(), &rep, sizeof(rep)));
+    EXPECT_EQ(0, std::memcmp(result.data() + sizeof(rep), lmeta.metadata.data(),
                              lmeta.metadata.size()));
 }
 } // namespace blobs