Testing package overview in Go - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the testing package in Go?

The testing package provides tools to write and run automated tests for Go code, helping ensure code correctness.

beginner

How do you write a basic test function using the testing package?

Create a function starting with Test and accepting t *testing.T as a parameter. Example:<br>

func TestExample(t *testing.T) { /* test code */ }

intermediate

What method do you use to report a test failure inside a test function?

Use t.Error() or t.Errorf() to report a failure but continue running the test, or t.Fatal() / t.Fatalf() to stop the test immediately.

beginner

How do you run tests in a Go project from the command line?

Use the command go test in the directory containing the test files. It automatically finds and runs tests.

advanced

What is the role of the TestMain function in Go testing?

TestMain(m *testing.M) allows setup and teardown before and after running tests. It controls the test execution flow.

Which prefix must a function have to be recognized as a test by the Go testing package?

A Verify

B Check

C Run

D Test

Test functions must start with 'Test' to be run by the Go testing tool.

What parameter type does a Go test function receive?

A testing.Test

B *testing.Test

C *testing.T

D testing.T

Test functions receive a pointer to testing.T to report test status.

Which command runs all tests in the current directory in Go?

A go test

B go build

C go run

D go check

go test runs all tests in the current directory.

What does t.Fatal() do inside a test?

A Stops the test immediately

B Logs an error and continues

C Skips the test

D Marks the test as passed

t.Fatal() logs the error and stops the test immediately.

What is the purpose of TestMain in Go tests?

A To define a test case

B To set up and tear down tests

C To run benchmarks

D To skip tests

TestMain allows setup and teardown around tests.

Explain how to write and run a basic test using the Go testing package.

Think about the function name and parameter, then how to run tests.

Describe the difference between t.Error() and t.Fatal() in Go tests.

Consider what happens after reporting an error.