golang testing package improvements

testing.go

package something

import "testing"

type MyFixture struct {
	*testing.T

	sut Something // stuff under test
}

// Setup methods (optionally) defined on fixtures will be run before each
// Test method.
func (t *MyFixture) Setup() {
	t.sut = NewSomething()
}

// Teardown methods (optionally) defined on fixtures will be run after each
// Test method.
func (t *MyFixture) Teardown() {
	t.sut = nil // or whatever other cleanup is needed
}

// Each Test method is run on a separate instance of MyFixture, after the Setup
// and before Teardown methods.
func (t *MyFixture) TestDoSomething() {
	t.Parallel()

	if testing.Short() {
		t.Skip("Long-running")
	}

	t.sut = t.sut.DoSomething()

	t.checkResults()
}

// Here's another test method, run on it's own instance of MyFixture, after having run Setup and before Teardown.
func (t *MyFixture) TestDoSomethingElse() {
	t.Parallel()

	if testing.Short() {
		t.Skip("Long-running")
	}

	t.sut = t.sut.DoSomethingElse()

	t.checkResults()
}

func (t *MyFixture) checkResults() {
	if t.sut == nil {
		t.Error("It didn't work")
	}
}

/* Sample output:

$ go test -v
=== RUN Test_MyFixture_Something
--- PASS: Test_MyFixture_Something (0.00s)
PASS
ok     github.com/user/repo  0.005s

*/