How Can I Run Specific Tests Within a Go Test Suite?

Running Specific Tests in Go Test Suites

When working with test suites in Go packages, it's often desirable to run individual tests to isolate and debug failures. This can significantly reduce debugging time compared to rerunning the entire suite. Fortunately, Go provides a way to selectively execute tests.

To run a single test in a test suite, use the go test -run flag. This flag takes a regular expression as its argument. Only tests or examples that match the expression will be executed.

For example, consider a test suite with the following tests:

import "testing"

func TestOne(t *testing.T) {}
func TestTwo(t *testing.T) {}
func TestThree(t *testing.T) {}

To run only TestOne, use the following command:

go test -run=TestOne

This will execute only TestOne, while ignoring the other tests in the suite.

The -run flag is a powerful tool for debugging and targeted testing. By selectively running specific tests, you can quickly isolate issues and speed up the debugging process.

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