updater: Cleanup Active blob to support multiple stages

Without the change, the update will fail due to existing active blob.
```
./burn_my_bmc --command update --interface ipmipci  \
  --image test.txt --sig test.txt --type bios
Sending over the firmware image.
sendFile with /flash/bios and test.txt
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Exception received: blob exception received: Received IPMI_CC: 255
```

With the Change, it will delete the active blob to continue the update.
```
./burn_my_bmc --command update --interface ipmipci  \
  --image test.txt --sig test.txt --type bios
Found an active blob, deleting /flash/active/image
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Sending over the firmware image.
sendFile with /flash/bios and test.txt
000Find [0x1050 0x750]
bar0[0x90100000]
Progress: 100.00%
001Sending over the hash file.
sendFile with /flash/hash and test.txt
000Find [0x1050 0x750]
bar0[0x90100000]
Progress: 100.00%
001Opening the verification file
Committing to /flash/verify to trigger service
Calling stat on /flash/verify session to check status
running
running
failed
Returned non-success (could still be running (unlikely))
failed
Opening the cleanup blob
Committing to the cleanup blob
Closing cleanup blob
Exception received: Verification failed
```

Signed-off-by: Willy Tu <wltu@google.com>
Change-Id: I46a802c7faece60a9b5354db47860e796af99107
diff --git a/tools/test/tools_updater_unittest.cpp b/tools/test/tools_updater_unittest.cpp
index 824cec9..60cc077 100644
--- a/tools/test/tools_updater_unittest.cpp
+++ b/tools/test/tools_updater_unittest.cpp
@@ -294,8 +294,32 @@
         .WillOnce(Return(true));
     EXPECT_CALL(handler, verifyFile(ipmi_flash::updateBlobId, defaultIgnore))
         .WillOnce(Return(true));
+    EXPECT_CALL(blobMock, getBlobList())
+        .WillOnce(Return(std::vector<std::string>({})));
 
-    updaterMain(&handler, image, signature, layout, defaultIgnore);
+    updaterMain(&handler, &blobMock, image, signature, layout, defaultIgnore);
+}
+
+TEST_F(UpdaterTest, UpdateMainReturnsSuccessIfAllSuccessWithDeleteActiveBlob)
+{
+    UpdateHandlerMock handler;
+
+    EXPECT_CALL(handler, checkAvailable(path)).WillOnce(Return(true));
+    EXPECT_CALL(handler, sendFile(path, image)).WillOnce(Return());
+    EXPECT_CALL(handler, sendFile(ipmi_flash::hashBlobId, signature))
+        .WillOnce(Return());
+    EXPECT_CALL(handler, verifyFile(ipmi_flash::verifyBlobId, defaultIgnore))
+        .WillOnce(Return(true));
+    EXPECT_CALL(handler, verifyFile(ipmi_flash::updateBlobId, defaultIgnore))
+        .WillOnce(Return(true));
+    EXPECT_CALL(handler, cleanArtifacts()).WillOnce(Return());
+    EXPECT_CALL(blobMock, deleteBlob(ipmi_flash::activeImageBlobId))
+        .WillOnce(Return());
+    EXPECT_CALL(blobMock, getBlobList())
+        .WillOnce(Return(std::vector<std::string>(
+            {ipmi_flash::staticLayoutBlobId, ipmi_flash::activeImageBlobId})));
+
+    updaterMain(&handler, &blobMock, image, signature, layout, defaultIgnore);
 }
 
 TEST_F(UpdaterTest, UpdateMainReturnsSuccessWithIgnoreUpdate)
@@ -311,8 +335,10 @@
         .WillOnce(Return(true));
     EXPECT_CALL(handler, verifyFile(ipmi_flash::updateBlobId, updateIgnore))
         .WillOnce(Return(true));
+    EXPECT_CALL(blobMock, getBlobList())
+        .WillOnce(Return(std::vector<std::string>({})));
 
-    updaterMain(&handler, image, signature, layout, updateIgnore);
+    updaterMain(&handler, &blobMock, image, signature, layout, updateIgnore);
 }
 
 TEST_F(UpdaterTest, UpdateMainCleansUpOnFailure)
@@ -326,8 +352,11 @@
     EXPECT_CALL(handler, verifyFile(ipmi_flash::verifyBlobId, defaultIgnore))
         .WillOnce(Return(false));
     EXPECT_CALL(handler, cleanArtifacts()).WillOnce(Return());
+    EXPECT_CALL(blobMock, getBlobList())
+        .WillOnce(Return(std::vector<std::string>({})));
 
-    EXPECT_THROW(updaterMain(&handler, image, signature, layout, defaultIgnore),
+    EXPECT_THROW(updaterMain(&handler, &blobMock, image, signature, layout,
+                             defaultIgnore),
                  ToolException);
 }
 
@@ -344,8 +373,11 @@
     EXPECT_CALL(handler, verifyFile(ipmi_flash::updateBlobId, defaultIgnore))
         .WillOnce(Return(false));
     EXPECT_CALL(handler, cleanArtifacts()).WillOnce(Return());
+    EXPECT_CALL(blobMock, getBlobList())
+        .WillOnce(Return(std::vector<std::string>({})));
 
-    EXPECT_THROW(updaterMain(&handler, image, signature, layout, defaultIgnore),
+    EXPECT_THROW(updaterMain(&handler, &blobMock, image, signature, layout,
+                             defaultIgnore),
                  ToolException);
 }
 
@@ -355,7 +387,8 @@
 
     EXPECT_CALL(handler, checkAvailable(path)).WillOnce(Return(false));
 
-    EXPECT_THROW(updaterMain(&handler, image, signature, layout, defaultIgnore),
+    EXPECT_THROW(updaterMain(&handler, &blobMock, image, signature, layout,
+                             defaultIgnore),
                  ToolException);
 }