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// This tests TimeoutReader
package swift
import (
"io"
"io/ioutil"
"sync"
"testing"
"time"
)
// An io.ReadCloser for testing
type testReader struct {
sync.Mutex
n int
delay time.Duration
closed bool
}
// Returns n bytes with at time.Duration delay
func newTestReader(n int, delay time.Duration) *testReader {
return &testReader{
n: n,
delay: delay,
}
}
// Returns 1 byte at a time after delay
func (t *testReader) Read(p []byte) (n int, err error) {
if t.n <= 0 {
return 0, io.EOF
}
time.Sleep(t.delay)
p[0] = 'A'
t.Lock()
t.n--
t.Unlock()
return 1, nil
}
// Close the channel
func (t *testReader) Close() error {
t.Lock()
t.closed = true
t.Unlock()
return nil
}
func TestTimeoutReaderNoTimeout(t *testing.T) {
test := newTestReader(3, 10*time.Millisecond)
cancelled := false
cancel := func() {
cancelled = true
}
tr := newTimeoutReader(test, 100*time.Millisecond, cancel)
b, err := ioutil.ReadAll(tr)
if err != nil || string(b) != "AAA" {
t.Fatalf("Bad read %s %s", err, b)
}
if cancelled {
t.Fatal("Cancelled when shouldn't have been")
}
if test.n != 0 {
t.Fatal("Didn't read all")
}
if test.closed {
t.Fatal("Shouldn't be closed")
}
tr.Close()
if !test.closed {
t.Fatal("Should be closed")
}
}
func TestTimeoutReaderTimeout(t *testing.T) {
// Return those bytes slowly so we get an idle timeout
test := newTestReader(3, 100*time.Millisecond)
cancelled := false
cancel := func() {
cancelled = true
}
tr := newTimeoutReader(test, 10*time.Millisecond, cancel)
_, err := ioutil.ReadAll(tr)
if err != TimeoutError {
t.Fatal("Expecting TimeoutError, got", err)
}
if !cancelled {
t.Fatal("Not cancelled when should have been")
}
test.Lock()
n := test.n
test.Unlock()
if n == 0 {
t.Fatal("Read all")
}
if n != 3 {
t.Fatal("Didn't read any")
}
if test.closed {
t.Fatal("Shouldn't be closed")
}
tr.Close()
if !test.closed {
t.Fatal("Should be closed")
}
}
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