Alex Vanin
cf18158da4
Periodic white space XML writer sends XML header and white spaces to the io.Writer. Signed-off-by: Alex Vanin <a.vanin@yadro.com>
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package handler
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import (
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"bytes"
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"encoding/xml"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func TestPeriodicWriter(t *testing.T) {
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const dur = 100 * time.Millisecond
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const whitespaces = 8
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expected := []byte(xml.Header)
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for i := 0; i < whitespaces; i++ {
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expected = append(expected, []byte(" ")...)
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}
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t.Run("writes data", func(t *testing.T) {
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buf := bytes.NewBuffer(nil)
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stop := periodicXMLWriter(buf, dur)
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// N number of whitespaces + half durations to guarantee at least N writes in buffer
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time.Sleep(whitespaces*dur + dur/2)
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require.True(t, stop())
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require.Equal(t, expected, buf.Bytes())
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t.Run("no additional data after stop", func(t *testing.T) {
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time.Sleep(2 * dur)
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require.Equal(t, expected, buf.Bytes())
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})
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})
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t.Run("does not write data", func(t *testing.T) {
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buf := bytes.NewBuffer(nil)
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stop := periodicXMLWriter(buf, dur)
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time.Sleep(dur / 2)
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require.False(t, stop())
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require.Empty(t, buf.Bytes())
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t.Run("disabled", func(t *testing.T) {
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stop = periodicXMLWriter(buf, 0)
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require.False(t, stop())
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require.Empty(t, buf.Bytes())
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})
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})
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}
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