github.com/onflow/flow-go@v0.35.7-crescendo-preview.23-atree-inlining/cmd/util/ledger/migrations/test-data/cadence_values_migration/README.md (about)

     1  ## Instructions for creating a snapshot
     2  
     3  To create a new snapshot for tests, follow the below steps.
     4  
     5  - Download a CLI which uses cadence version pre-1.0 (e.g. CLI version `v1.5.0`)
     6  
     7  - Start emulator with the `--persist` flag.
     8    ```shell
     9    flow emulator --persist
    10    ```
    11  
    12  - Create an account name `test`.
    13    ```shell
    14    flow accounts create
    15    ```
    16  
    17  - Update the `testAccountAddress` constant in the [cadence_values_migration_test.go](../../cadence_values_migration_test.go)
    18    with the address of the account just created.
    19  
    20  - Deploy the `Test` contract. For that, first add the below entries to the `flow.json`
    21    ```json
    22     {
    23      "contracts": {
    24        "Test": "./test_contract.cdc"
    25      },
    26      "deployments": {
    27        "emulator": {
    28          "test": [
    29            "Test"
    30          ]
    31        }
    32      }
    33    }
    34    ```
    35    Then run:
    36    ```shell
    37    flow deploy
    38    ```
    39  
    40  - To store the values, run the transaction [store_transaction.cdc](store_transaction.cdc),
    41    using the newly created `test` account as the signer.
    42    ```shell
    43    flow transactions send store_transaction.cdc --signer test
    44    ```
    45  
    46  - Create a snapshot of the emulator state using the REST API:
    47    ```shell
    48    curl -H "Content-type: application/x-www-form-urlencoded" -X POST http://localhost:8080/emulator/snapshots -d "name=test_snapshot"
    49    ```
    50  
    51  - Above will create file named `snapshot.test_snapshot` in a directly called `flowdb` where the flow project was initialized.
    52    Copy it to this directly (`test-data/cadence_values_migration`) and rename it to `snapshot`.