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iter_test.go
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iter_test.go
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package couchdb
import (
"context"
"errors"
"io"
"io/ioutil"
"strings"
"testing"
"time"
"gitlab.com/flimzy/testy"
)
func TestCancelableReadCloser(t *testing.T) {
t.Run("no cancelation", func(t *testing.T) {
t.Parallel()
rc := newCancelableReadCloser(
context.Background(),
ioutil.NopCloser(strings.NewReader("foo")),
)
result, err := ioutil.ReadAll(rc)
testy.Error(t, "", err)
if string(result) != "foo" {
t.Errorf("Unexpected result: %s", string(result))
}
})
t.Run("pre-canceled", func(t *testing.T) {
t.Parallel()
ctx, cancel := context.WithCancel(context.Background())
cancel()
rc := newCancelableReadCloser(
ctx,
ioutil.NopCloser(strings.NewReader("foo")),
)
result, err := ioutil.ReadAll(rc)
testy.Error(t, "context canceled", err)
if string(result) != "" {
t.Errorf("Unexpected result: %s", string(result))
}
})
t.Run("canceled mid-flight", func(t *testing.T) {
t.Parallel()
ctx, cancel := context.WithTimeout(context.Background(), 150*time.Millisecond)
defer cancel()
r := io.MultiReader(
strings.NewReader("foo"),
testy.DelayReader(time.Second),
strings.NewReader("bar"),
)
rc := newCancelableReadCloser(
ctx,
ioutil.NopCloser(r),
)
result, err := ioutil.ReadAll(rc)
testy.Error(t, "context deadline exceeded", err)
if string(result) != "" {
t.Errorf("Unexpected result: %s", string(result))
}
})
t.Run("read error, not canceled", func(t *testing.T) {
t.Parallel()
rc := newCancelableReadCloser(
context.Background(),
ioutil.NopCloser(testy.ErrorReader("foo", errors.New("read err"))),
)
result, err := ioutil.ReadAll(rc)
testy.Error(t, "read err", err)
if string(result) != "" {
t.Errorf("Unexpected result: %s", string(result))
}
})
t.Run("closed early", func(t *testing.T) {
t.Parallel()
rc := newCancelableReadCloser(
context.Background(),
ioutil.NopCloser(testy.NeverReader()),
)
rc.Close()
result, err := ioutil.ReadAll(rc)
testy.Error(t, "iterator closed", err)
if string(result) != "" {
t.Errorf("Unexpected result: %s", string(result))
}
})
}