How Can I Guarantee Sequential Execution of Go Tests When Database Resetting Is Involved?

Ensuring Sequential Execution of Go Tests

When running go test, you may encounter unexpected test failures when your database is reset. This is because the test execution order is not guaranteed, meaning that GET requests may be executed before the corresponding POST requests that create data in the database.

Test Independence

Tests should be independent of each other and not rely on the execution order. However, in some cases, it may be necessary to ensure that certain tasks are performed before a test function is run.

Options for Setup

There are several options for performing additional tasks before a test function is executed:

• Test Function: Place the setup code directly in the test function itself.
• Package Init Function: Use the package init() function in the _test.go file, which runs once before test execution begins.
• TestMain Function: Implement a TestMain() function, which is called first and allows for setup before calling M.Run() to execute test functions.
• Mixed Options: Combine the above options to suit your specific needs.

Solution

In your case, you should use the package init() or TestMain() function to check if your database is initialized. If not, insert the necessary test records to ensure that GET requests have the required data available.

Subtests

Starting with Go 1.7, you can use subtests to define the execution order of subtests within a test function. This allows you to control the order in which specific tests are executed, providing more flexibility in handling dependencies.

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