go-best-test

Good testing practice in building web applications in Go

Unit, integration, end-to-end and benchmark tests (performance)

Running

1. Run go mod init github.com/monkrus/go-best-test

2. Interesting testing-related packages : testing, testing/quick, testing/iotest and net/http/httptest

3. Other projects :

   github.com/stretchcom/testif (assertions),

   github.com/onsi/ginkgo (BDD),

   goconvey.com (visual results in the browser),

   github.com/gavv/httpexpect (end-to-end testing, e.g. RestAPI),

   code.google.com/p/gomock (injecting mocks into your tests),

   github.com/DATA-DOG/go-sqlmock (DB testing)

Test creating rules

1. Add _test to filenames
2. Prefix tests with Test
3. Accept one parameter *testing.T
4. Remove _test suffix for whitebox tests

Writing tests

1. Receive *testing.T object

2. No special assertions API, use normal Go code

3. Report errors using methods on *testing.T object

4. Immediate failure FailNow(), Fatal(args ..interface{}), Fatalf(format strings, args ..interface{})

5. Non-immediate failure Fail(), Error(args ...interface{}), Errorf(format string, args ..interface{})

Testing

1. go test or go test {pkg1}

2. go test./... Will fund tests on current directory and subtree

3. go test -v Generates verbose output

4. go test -run {regexp} To concentrate on the spesific tests (matching)

5. go help testflags

6. go test run {function name}- to run specific function

Test coverage report

1. go test -cover

2. Reports go test -coverprofile cover.out or go tool cover -func cover.out

3. Graphical coverage go test -coverprofile count.out -covermode count and then go tool cover -html cover.out

Other methods

1. Log and logf-(write a message testing output)

2. Helper (for helper method)

3. Skip, Skipf, SkipNow

4. Run (create subtest)

5. Parallel