Better Code Exploring Validity David Sankel | Principal Scientist CppCon 2023© 2023 Adobe. All Rights Reserved. Adobe’s Software Technology Lab Sean Parent Senior Principal Scientist Manager, Software Incomplete Complete© 2023 Adobe. All Rights Reserved. Validity Two categories One attracts and the other repels© 2023 Adobe. All Rights Reserved. Validity Two categories One attracts and the other repulses© Rights Reserved. Validity Two categories One attracts and the other repulses© 2023 Adobe. All Rights Reserved. Validity Two categories One attracts and the other repels Validity is with respect to

functions to be executed against non-static variables. In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in will say: Cannot commit block to the ledger due to Error validating config which passed initial validity checks: ConfigEnvelope LastUpdate did not produce the supplied config result We will enable capabilities org/github.com/hyperledger/fabric/core/chaincode/shim#ChaincodeStub.GetStringArgs] function and check for validity. In our case, we are expecting a key-value pair. // Init is called during chaincode instantiation

functions to be executed against non-static variables. In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in Channels are created by generating the configuration block on the ordering service, which evaluates the validity of the channel configuration. Channels are useful because they allow for data isolation and confidentiality the world state. If a transaction is not signed by sufficient endorsers, then it will fail this validity check, and will not result in an update to the world state. You’ll also notice that a state has

hyperledger-fabricdocs Documentation, Release master In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in Channels are created by generating the configuration block on the ordering service, which evaluates the validity of the channel configuration. Channels are useful because they allow for data isolation and confidentiality the world state. If a transaction is not signed by sufficient endorsers, then it will fail this validity check, and will not result in an update to the world state. You’ll also notice that a state has

functions to be executed against non-static variables. In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in will say: Cannot commit block to the ledger due to Error validating config which passed initial validity checks: ConfigEnvelope LastUpdate did not produce the supplied config result We will enable capabilities arguments to the Init call using the ChaincodeStubInterface.GetStringArgs function and check for validity. In our case, we are expecting a key-value pair. // Init is called during chaincode instantiation

-MO[DE] "read_only" or "read_write" access -N[O_VALIDITY] do not restore database validity conditions -NOD[BTRIGGERS] do not run database triggers Chapter "read_only" or "read_write" access Chapter 2. Command-line Options 6 -N(O_VALIDITY) do not restore database validity conditions -O(NE_AT_A_TIME) restore one table at a time access mode when opened. By default, the mode is taken from the database that was dumped. -N[O_VALIDITY] This switch is similar to the -i[nactive] switch above, except, it disabled all check constraints

functions to be executed against non-static variables. In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in the world state. If a transaction is not signed by sufficient endorsers, then it will fail this validity check, and will not result in an update to the world state. You’ll also notice that a state has org/github.com/hyperledger/fabric/core/chaincode/shim#ChaincodeStub.GetStringArgs] function and check for validity. In our case, we are expecting a key-value pair. // Init is called during chaincode instantiation

completely : give bugs no place to hide Test Correctly : correct statement of "right" answer Test Validity: no circular logic or unfalsifiable tests Part 1: Testing Accuracy 33Completeness The full story: be/W40mpZP9xQQ YouTube channel: https://www.youtube.com/c/ContinuousDelivery Part 1: Testing Precision Validity 43Test Validly We have just proven that "The code we wrote is the code we wrote" ** ** Dave Farley what_I_got_by_running_it; CHECK( compute_pi() == correct_value ); } Test Validity Don't do this! Part 1: Testing Precision Validity 45Part 1: Good Tests Summary Tests as science: Falsifiable Hypotheses

hyperledger-fabricdocs Documentation, Release master In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in the world state. If a transaction is not signed by sufficient endorsers, then it will fail this validity check, and will not result in an update to the world state. You’ll also notice that a state has arguments to the Init call using the ChaincodeStubInterface.GetStringArgs function and check for validity. In our case, we are expecting a key-value pair. // Init is called during chaincode instantiation

functions to be executed against non-static variables. In addition to the multitude of endorsement, validity and versioning checks that take place, there are also ongoing identity verifications happening in clients should listen on peers for transaction commit events regardless (to check for transaction validity), but extra care should be taken to ensure that the client also gracefully tolerates a timeout in org/github.com/hyperledger/fabric/core/chaincode/shim#ChaincodeStub.GetStringArgs] function and check for validity. In our case, we are expecting a key-value pair. // Init is called during chaincode instantiation