How to resolve `Could not lock exclusive.lock`

[antstalepresh]

When writing test, test suite is used to simplify testing code. Here's the architecture of test.

func New() *App {
...
    homePath := cast.ToString(appOpts.Get(flags.FlagHome))
    wasmDir := filepath.Join(homePath, "wasm")
    wasmer, err := wasmvm.NewVM(
        filepath.Join(wasmDir, "wasm"),
        availableCapabilities,
        32, // wasmkeeper.contractMemoryLimit,
        wasmConfig.ContractDebugMode,
        wasmConfig.MemoryCacheSize,
    )
    if err != nil {
        panic(err)
    }
...
}

func Setup()  *App {
...
    app := New(
        log.NewNopLogger(),
        db,
        nil,
        true,
        appOptions,
        wasmOpts,
    )
...
}

type KeeperTestSuite struct {
    suite.Suite

    ctx sdk.Context

    app *app.App
}

func (suite *KeeperTestSuite) SetupTest() {
    suite.app = app.Setup(suite.T(), false)
    suite.ctx = suite.app.BaseApp.NewContext(false)
}

func (suite *KeeperTestSuite) Test1() {
...
}

func (suite *KeeperTestSuite) Test2() {
...
}

When Test1 and Test2 are run individually, it works fine, but when they are run both, it is returning following issue.

test panicked: Could not lock exclusive.lock. Is a different VM running in the same directory already?
            goroutine 315 [running]:

Would be nice to get recommendation for the best way to fix the issue in test suite.

[webmaster128]

This is a newly added safety check implemented in wasmvm 2. The idea is that no two wasmvm.VM instances should run on the same directory at the same time. When you write tests that run in parallel, you need to use a different directory for each test. So more or less create a temp dir here for each test:

wasmDir := filepath.Join(homePath, "wasm")

[antstalepresh]

Thanks for your input, closing the issue.