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atomic_number_test.go
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atomic_number_test.go
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package twerk
import (
"github.com/stretchr/testify/assert"
"testing"
"time"
)
func TestInitNumber(t *testing.T) {
num := newAtomicNumber(123)
assert.Equal(t, 123, num.Get())
}
func TestThatIncreaseActuallyIncreasesANumber(t *testing.T) {
num := newAtomicNumber(123)
num.Incr()
assert.Equal(t, 124, num.Get())
}
func TestThatDecreaseActuallyDecreasesANumber(t *testing.T) {
num := newAtomicNumber(123)
num.Decr()
assert.Equal(t, 122, num.Get())
}
func TestThatMultipleGoroutinesAccessingItCalculatesItCorrectly(t *testing.T) {
num := newAtomicNumber(0)
increaseFunc := func(number *atomicNumber) {
number.Incr()
}
go increaseFunc(num)
go increaseFunc(num)
// not the best way but I don't want to introduce locking here
time.Sleep(10 * time.Millisecond)
assert.Equal(t, 2, num.Get())
}
func TestThatMultipleGoroutinesAccessingItCalculatesItCorrectlyDecreasing(t *testing.T) {
num := newAtomicNumber(0)
decreaseFunc := func(number *atomicNumber) {
number.Decr()
}
go decreaseFunc(num)
go decreaseFunc(num)
// not the best way but I don't want to introduce locking here
time.Sleep(10 * time.Millisecond)
assert.Equal(t, -2, num.Get())
}