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package qver_test
import (
"testing"
"github.com/stretchr/testify/require"
"git.samanthony.xyz/buth/back/qver"
)
// Bump() should increment the version.
func TestBump(t *testing.T) {
t.Parallel()
ver := qver.New()
defer ver.Close()
var i uint32
for i = 0; i < 5; i++ {
requireVer(t, i, ver)
ver.Bump()
}
}
// Bumping the child version should bump the parent version too.
func TestBumpChild(t *testing.T) {
t.Parallel()
parent := qver.New()
child := qver.New(qver.Parent(parent))
defer parent.Close()
defer child.Close()
var i uint32
for i = 0; i < 5; i++ {
requireVer(t, i, child)
requireVer(t, i, parent)
child.Bump()
}
}
// Bumping the parent version should not affect the child.
func TestBumpParent(t *testing.T) {
t.Parallel()
parent := qver.New()
child := qver.New(qver.Parent(parent))
defer parent.Close()
defer child.Close()
requireVer(t, 0, parent)
requireVer(t, 0, child)
for i := 0; i < 5; i++ {
parent.Bump()
}
requireVer(t, 5, parent)
requireVer(t, 0, child)
}
// Bumps should propagate up the chain from parent to child.
func TestBumpChain(t *testing.T) {
t.Parallel()
a := qver.New()
b := qver.New(qver.Parent(a))
c := qver.New(qver.Parent(b))
defer a.Close()
defer b.Close()
defer c.Close()
var i uint32
for i = 0; i < 5; i++ {
requireVer(t, i, a)
requireVer(t, i, b)
requireVer(t, i, c)
c.Bump()
}
}
// Parent can have several children.
func TestMultiChild(t *testing.T) {
t.Parallel()
root := qver.New()
a, b := qver.New(qver.Parent(root)), qver.New(qver.Parent(root))
defer root.Close()
defer a.Close()
defer b.Close()
var i uint32
for i = 0; i < 3; i++ {
requireVer(t, i, root)
a.Bump()
}
for i = 0; i < 3; i++ {
requireVer(t, i+3, root)
b.Bump()
}
root.Bump()
requireVer(t, 3+3+1, root)
}
func TestUpdate(t *testing.T) {
t.Parallel()
state, update := newUpdateFunc()
ver := qver.New(qver.Update(state, update))
defer ver.Close()
requireVer(t, 0, ver)
state <- true
requireVer(t, 1, ver)
requireVer(t, 1, ver)
state <- false
requireVer(t, 1, ver)
state <- true
requireVer(t, 2, ver)
}
// Updating the child should bump the parent's version.
func TestUpdateChild(t *testing.T) {
t.Parallel()
parent := qver.New()
defer parent.Close()
state, update := newUpdateFunc()
child := qver.New(qver.Parent(parent), qver.Update(state, update))
defer close(state)
defer child.Close()
requireVer(t, 0, parent)
requireVer(t, 0, child)
state <- true // update child
requireVer(t, 1, parent)
requireVer(t, 1, child)
}
// Updating the parent should not affect the child.
func TestUpdateParent(t *testing.T) {
t.Parallel()
state, update := newUpdateFunc()
parent := qver.New(qver.Update(state, update))
child := qver.New(qver.Parent(parent))
defer close(state)
defer parent.Close()
defer child.Close()
requireVer(t, 0, parent)
requireVer(t, 0, child)
state <- true // update parent
requireVer(t, 1, parent)
requireVer(t, 0, child)
}
// Parent should keep working after child is closed.
func TestCloseChild(t *testing.T) {
t.Parallel()
a := qver.New()
requireVer(t, 0, a)
a.Bump()
requireVer(t, 1, a)
b := qver.New(qver.Parent(a))
b.Bump()
requireVer(t, 2, a)
b.Close()
requireVer(t, 2, a)
a.Bump()
requireVer(t, 3, a)
a.Close()
}
// Update when state buffer contains 'true'.
func newUpdateFunc() (state chan bool, f qver.UpdateFunc) {
return make(chan bool, 1), func(v uint32, state interface{}) (uint32, interface{}, error) {
s := state.(chan bool)
select {
case inc := <-s:
if inc {
v++
}
default:
}
return v, s, nil
}
}
func requireVer(t *testing.T, want uint32, v *qver.Version) {
t.Helper()
got, err := v.Get()
require.NoError(t, err)
require.Equal(t, want, got)
}
func requireAllVer(t *testing.T, want uint32, vs ...*qver.Version) {
t.Helper()
for _, v := range vs {
requireVer(t, want, v)
}
}
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