// PutBlock inserts a raw block into the blockchain at the specified index, nearly no error checking is performed
func (h *Helper) PutBlock(blockNumber uint64, block *pb.Block) error {
ledger, err := ledger.GetLedger()
if err != nil {
return fmt.Errorf("Failed to get the ledger :%v", err)
}
return ledger.PutRawBlock(block, blockNumber)
}
func TestServerOpenchainREST_API_GetBlockByNumber(t *testing.T) {
// Construct a ledger with 0 blocks.
ledger := ledger.InitTestLedger(t)
initGlobalServerOpenchain(t)
// Start the HTTP REST test server
httpServer := httptest.NewServer(buildOpenchainRESTRouter())
defer httpServer.Close()
body := performHTTPGet(t, httpServer.URL+"/chain/blocks/0")
res := parseRESTResult(t, body)
if res.Error == "" {
t.Errorf("Expected an error when retrieving block 0 of an empty blockchain, but got none")
}
// add 3 blocks to the ledger
buildTestLedger1(ledger, t)
// Retrieve the first block from the blockchain (block number = 0)
body0 := performHTTPGet(t, httpServer.URL+"/chain/blocks/0")
var block0 protos.Block
err := json.Unmarshal(body0, &block0)
if err != nil {
t.Fatalf("Invalid JSON response: %v", err)
}
// Retrieve the 3rd block from the blockchain (block number = 2)
body2 := performHTTPGet(t, httpServer.URL+"/chain/blocks/2")
var block2 protos.Block
err = json.Unmarshal(body2, &block2)
if err != nil {
t.Fatalf("Invalid JSON response: %v", err)
}
if len(block2.Transactions) != 2 {
t.Errorf("Expected block to contain 2 transactions but got %v", len(block2.Transactions))
}
// Retrieve the 5th block from the blockchain (block number = 4), which
// should fail because the ledger has only 3 blocks.
body4 := performHTTPGet(t, httpServer.URL+"/chain/blocks/4")
res4 := parseRESTResult(t, body4)
if res4.Error == "" {
t.Errorf("Expected an error when retrieving non-existing block, but got none")
}
// Illegal block number
body = performHTTPGet(t, httpServer.URL+"/chain/blocks/NOT_A_NUMBER")
res = parseRESTResult(t, body)
if res.Error == "" {
t.Errorf("Expected an error when URL doesn't have a number, but got none")
}
// Add a fake block number 9 and try to fetch non-existing block 6
ledger.PutRawBlock(&block0, 9)
body = performHTTPGet(t, httpServer.URL+"/chain/blocks/6")
res = parseRESTResult(t, body)
if res.Error == "" {
t.Errorf("Expected an error when block doesn't exist, but got none")
}
}