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queue_test.go
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110 lines (86 loc) · 1.83 KB
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package cliutil_test
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/coder/coder/v2/cli/cliutil"
)
func TestQueue(t *testing.T) {
t.Parallel()
t.Run("DropsFirst", func(t *testing.T) {
t.Parallel()
q := cliutil.NewQueue[int](10)
require.Equal(t, 0, q.Len())
for i := 0; i < 20; i++ {
err := q.Push(i)
require.NoError(t, err)
if i < 10 {
require.Equal(t, i+1, q.Len())
} else {
require.Equal(t, 10, q.Len())
}
}
val, ok := q.Pop()
require.True(t, ok)
require.Equal(t, 10, val)
require.Equal(t, 9, q.Len())
})
t.Run("Pop", func(t *testing.T) {
t.Parallel()
q := cliutil.NewQueue[int](10)
for i := 0; i < 5; i++ {
err := q.Push(i)
require.NoError(t, err)
}
// No blocking, should pop immediately.
for i := 0; i < 5; i++ {
val, ok := q.Pop()
require.True(t, ok)
require.Equal(t, i, val)
}
// Pop should block until the next push.
go func() {
err := q.Push(55)
assert.NoError(t, err)
}()
item, ok := q.Pop()
require.True(t, ok)
require.Equal(t, 55, item)
})
t.Run("Close", func(t *testing.T) {
t.Parallel()
q := cliutil.NewQueue[int](10)
done := make(chan bool)
go func() {
_, ok := q.Pop()
done <- ok
}()
q.Close()
require.False(t, <-done)
_, ok := q.Pop()
require.False(t, ok)
err := q.Push(10)
require.Error(t, err)
})
t.Run("WithPredicate", func(t *testing.T) {
t.Parallel()
q := cliutil.NewQueue[int](10)
q.WithPredicate(func(n int) (int, bool) {
if n == 2 {
return n, false
}
return n + 1, true
})
for i := 0; i < 5; i++ {
err := q.Push(i)
require.NoError(t, err)
}
got := []int{}
for i := 0; i < 4; i++ {
val, ok := q.Pop()
require.True(t, ok)
got = append(got, val)
}
require.Equal(t, []int{1, 2, 4, 5}, got)
})
}