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package gbytes_test
import (
"fmt"
"io"
"time"
. "github.com/onsi/gomega/gbytes"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
type FakeCloser struct {
err error
duration time.Duration
}
func (f FakeCloser) Close() error {
time.Sleep(f.duration)
return f.err
}
type FakeReader struct {
err error
duration time.Duration
}
func (f FakeReader) Read(p []byte) (int, error) {
time.Sleep(f.duration)
if f.err != nil {
return 0, f.err
}
for i := 0; i < len(p); i++ {
p[i] = 'a'
}
return len(p), nil
}
type FakeWriter struct {
err error
duration time.Duration
}
func (f FakeWriter) Write(p []byte) (int, error) {
time.Sleep(f.duration)
if f.err != nil {
return 0, f.err
}
return len(p), nil
}
var _ = Describe("Io Wrappers", func() {
Describe("TimeoutCloser", func() {
var innerCloser io.Closer
var timeoutCloser io.Closer
JustBeforeEach(func() {
timeoutCloser = TimeoutCloser(innerCloser, 20*time.Millisecond)
})
Context("when the underlying Closer closes with no error", func() {
BeforeEach(func() {
innerCloser = FakeCloser{}
})
It("returns with no error", func() {
Expect(timeoutCloser.Close()).Should(Succeed())
})
})
Context("when the underlying Closer closes with an error", func() {
BeforeEach(func() {
innerCloser = FakeCloser{err: fmt.Errorf("boom")}
})
It("returns the error", func() {
Expect(timeoutCloser.Close()).Should(MatchError("boom"))
})
})
Context("when the underlying Closer hangs", func() {
BeforeEach(func() {
innerCloser = FakeCloser{
err: fmt.Errorf("boom"),
duration: time.Hour,
}
})
It("returns ErrTimeout", func() {
Expect(timeoutCloser.Close()).Should(MatchError(ErrTimeout))
})
})
})
Describe("TimeoutReader", func() {
var innerReader io.Reader
var timeoutReader io.Reader
JustBeforeEach(func() {
timeoutReader = TimeoutReader(innerReader, 20*time.Millisecond)
})
Context("when the underlying Reader returns no error", func() {
BeforeEach(func() {
innerReader = FakeReader{}
})
It("returns with no error", func() {
p := make([]byte, 5)
n, err := timeoutReader.Read(p)
Expect(n).Should(Equal(5))
Expect(err).ShouldNot(HaveOccurred())
Expect(p).Should(Equal([]byte("aaaaa")))
})
})
Context("when the underlying Reader returns an error", func() {
BeforeEach(func() {
innerReader = FakeReader{err: fmt.Errorf("boom")}
})
It("returns the error", func() {
p := make([]byte, 5)
_, err := timeoutReader.Read(p)
Expect(err).Should(MatchError("boom"))
})
})
Context("when the underlying Reader hangs", func() {
BeforeEach(func() {
innerReader = FakeReader{err: fmt.Errorf("boom"), duration: time.Hour}
})
It("returns ErrTimeout", func() {
p := make([]byte, 5)
_, err := timeoutReader.Read(p)
Expect(err).Should(MatchError(ErrTimeout))
})
})
})
Describe("TimeoutWriter", func() {
var innerWriter io.Writer
var timeoutWriter io.Writer
JustBeforeEach(func() {
timeoutWriter = TimeoutWriter(innerWriter, 20*time.Millisecond)
})
Context("when the underlying Writer returns no error", func() {
BeforeEach(func() {
innerWriter = FakeWriter{}
})
It("returns with no error", func() {
n, err := timeoutWriter.Write([]byte("aaaaa"))
Expect(n).Should(Equal(5))
Expect(err).ShouldNot(HaveOccurred())
})
})
Context("when the underlying Writer returns an error", func() {
BeforeEach(func() {
innerWriter = FakeWriter{err: fmt.Errorf("boom")}
})
It("returns the error", func() {
_, err := timeoutWriter.Write([]byte("aaaaa"))
Expect(err).Should(MatchError("boom"))
})
})
Context("when the underlying Writer hangs", func() {
BeforeEach(func() {
innerWriter = FakeWriter{err: fmt.Errorf("boom"), duration: time.Hour}
})
It("returns ErrTimeout", func() {
_, err := timeoutWriter.Write([]byte("aaaaa"))
Expect(err).Should(MatchError(ErrTimeout))
})
})
})
})
|
