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Passing transient data between test and chaincode


Testing the chaincode during developmentWhy after Unmarshalling I got different num of bytes but the same result after Marshalling?Error when instantiate chaincodeAssign additional field when unmarshalling JSON object to GO structHyperledger Fabric: peer chaincode invoke: pass JSON object to chaincode function?Hyperledger Fabric Chaincode Development Language - NodeJS, Java, or Go?Using CGO develop fabric chaincodeFabric chaincode instantiation failsOrderer timeout while Instantiating the chaincode using Docker-ComposeError when invoking chaincode: signature set did not satisfy policy













0















From what I've seen, Fabric doesn't support testing private data collections with MockStub. What I've tried to do below is workaround the lack of a transient field on MockStub by embedding MockStub within another struct.



The problem is that in the chaincode, while I can extract the transient data (stub.GetTransient()), I cannot access the needed field of my map.



Here's my struct:



type MockStubWithTransient struct 
shim.MockStub
transient map[string]interface



The test:



func TestCreatePOI (t *testing.T) 
fmt.Println("Entering TestCreatePOI")
stub := NewMockStubWithTransient(""poi":"status":"unconfirmed","id":"123"")
fmt.Println(stub)
// prints: &[] 0x158ffc0 mockStub map[] 0xc00014e960 map[] <nil> <nil> map[] map[] 0xc0000467e0 map[] map[poi:map[status:unconfirmed id:123]]
// can access stub.transient["poi"]

result := stub.MockInvoke("001",[][]byte[]byte("CreatePOI"))
fmt.Println(result)


func NewMockStubWithTransient(transient string) *MockStubWithTransient
var tMap map[string]interface
_ := json.Unmarshal([]byte(transient), &tMap)
s := shim.NewMockStub("mockStub", new(POIChaincode))
st := &MockStubWithTransient
transient: tMap,
MockStub: *s,


return st



When I print the stub as my chaincode sees it, I get:



&[[67 114 101 97 116 101 80 114 111 111 102 79 102 73 110 115 117 114 97 110 99 101]] 0x158ffc0 mockStub map[] 0xc00014e960 map[] 001 seconds:1551988379 nanos:68249460 0xc0000c6190 map[] map[] 0xc0000467e0 map[]


And I can call stub.GetTransient() but what I get is map[].



How can I populate and access the transient field of stub when stub originates in a test?



I'm not set on this method of doing things, I just need a way to unit test my chaincode that utilizes private data collections. Thank you!










share|improve this question




























    0















    From what I've seen, Fabric doesn't support testing private data collections with MockStub. What I've tried to do below is workaround the lack of a transient field on MockStub by embedding MockStub within another struct.



    The problem is that in the chaincode, while I can extract the transient data (stub.GetTransient()), I cannot access the needed field of my map.



    Here's my struct:



    type MockStubWithTransient struct 
    shim.MockStub
    transient map[string]interface



    The test:



    func TestCreatePOI (t *testing.T) 
    fmt.Println("Entering TestCreatePOI")
    stub := NewMockStubWithTransient(""poi":"status":"unconfirmed","id":"123"")
    fmt.Println(stub)
    // prints: &[] 0x158ffc0 mockStub map[] 0xc00014e960 map[] <nil> <nil> map[] map[] 0xc0000467e0 map[] map[poi:map[status:unconfirmed id:123]]
    // can access stub.transient["poi"]

    result := stub.MockInvoke("001",[][]byte[]byte("CreatePOI"))
    fmt.Println(result)


    func NewMockStubWithTransient(transient string) *MockStubWithTransient
    var tMap map[string]interface
    _ := json.Unmarshal([]byte(transient), &tMap)
    s := shim.NewMockStub("mockStub", new(POIChaincode))
    st := &MockStubWithTransient
    transient: tMap,
    MockStub: *s,


    return st



    When I print the stub as my chaincode sees it, I get:



    &[[67 114 101 97 116 101 80 114 111 111 102 79 102 73 110 115 117 114 97 110 99 101]] 0x158ffc0 mockStub map[] 0xc00014e960 map[] 001 seconds:1551988379 nanos:68249460 0xc0000c6190 map[] map[] 0xc0000467e0 map[]


    And I can call stub.GetTransient() but what I get is map[].



    How can I populate and access the transient field of stub when stub originates in a test?



    I'm not set on this method of doing things, I just need a way to unit test my chaincode that utilizes private data collections. Thank you!










    share|improve this question


























      0












      0








      0








      From what I've seen, Fabric doesn't support testing private data collections with MockStub. What I've tried to do below is workaround the lack of a transient field on MockStub by embedding MockStub within another struct.



      The problem is that in the chaincode, while I can extract the transient data (stub.GetTransient()), I cannot access the needed field of my map.



      Here's my struct:



      type MockStubWithTransient struct 
      shim.MockStub
      transient map[string]interface



      The test:



      func TestCreatePOI (t *testing.T) 
      fmt.Println("Entering TestCreatePOI")
      stub := NewMockStubWithTransient(""poi":"status":"unconfirmed","id":"123"")
      fmt.Println(stub)
      // prints: &[] 0x158ffc0 mockStub map[] 0xc00014e960 map[] <nil> <nil> map[] map[] 0xc0000467e0 map[] map[poi:map[status:unconfirmed id:123]]
      // can access stub.transient["poi"]

      result := stub.MockInvoke("001",[][]byte[]byte("CreatePOI"))
      fmt.Println(result)


      func NewMockStubWithTransient(transient string) *MockStubWithTransient
      var tMap map[string]interface
      _ := json.Unmarshal([]byte(transient), &tMap)
      s := shim.NewMockStub("mockStub", new(POIChaincode))
      st := &MockStubWithTransient
      transient: tMap,
      MockStub: *s,


      return st



      When I print the stub as my chaincode sees it, I get:



      &[[67 114 101 97 116 101 80 114 111 111 102 79 102 73 110 115 117 114 97 110 99 101]] 0x158ffc0 mockStub map[] 0xc00014e960 map[] 001 seconds:1551988379 nanos:68249460 0xc0000c6190 map[] map[] 0xc0000467e0 map[]


      And I can call stub.GetTransient() but what I get is map[].



      How can I populate and access the transient field of stub when stub originates in a test?



      I'm not set on this method of doing things, I just need a way to unit test my chaincode that utilizes private data collections. Thank you!










      share|improve this question
















      From what I've seen, Fabric doesn't support testing private data collections with MockStub. What I've tried to do below is workaround the lack of a transient field on MockStub by embedding MockStub within another struct.



      The problem is that in the chaincode, while I can extract the transient data (stub.GetTransient()), I cannot access the needed field of my map.



      Here's my struct:



      type MockStubWithTransient struct 
      shim.MockStub
      transient map[string]interface



      The test:



      func TestCreatePOI (t *testing.T) 
      fmt.Println("Entering TestCreatePOI")
      stub := NewMockStubWithTransient(""poi":"status":"unconfirmed","id":"123"")
      fmt.Println(stub)
      // prints: &[] 0x158ffc0 mockStub map[] 0xc00014e960 map[] <nil> <nil> map[] map[] 0xc0000467e0 map[] map[poi:map[status:unconfirmed id:123]]
      // can access stub.transient["poi"]

      result := stub.MockInvoke("001",[][]byte[]byte("CreatePOI"))
      fmt.Println(result)


      func NewMockStubWithTransient(transient string) *MockStubWithTransient
      var tMap map[string]interface
      _ := json.Unmarshal([]byte(transient), &tMap)
      s := shim.NewMockStub("mockStub", new(POIChaincode))
      st := &MockStubWithTransient
      transient: tMap,
      MockStub: *s,


      return st



      When I print the stub as my chaincode sees it, I get:



      &[[67 114 101 97 116 101 80 114 111 111 102 79 102 73 110 115 117 114 97 110 99 101]] 0x158ffc0 mockStub map[] 0xc00014e960 map[] 001 seconds:1551988379 nanos:68249460 0xc0000c6190 map[] map[] 0xc0000467e0 map[]


      And I can call stub.GetTransient() but what I get is map[].



      How can I populate and access the transient field of stub when stub originates in a test?



      I'm not set on this method of doing things, I just need a way to unit test my chaincode that utilizes private data collections. Thank you!







      go hyperledger-fabric hyperledger-chaincode






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Mar 11 at 17:11







      BillD

















      asked Mar 7 at 20:13









      BillDBillD

      33




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