Create packages client/internal/ retry and lhttp.

client/internal/retry/retry_test.go

Index: client/internal/retry/retry_test.go
diff --git a/client/internal/retry/retry_test.go b/client/internal/retry/retry_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..33c45dacfefbe335eaa7e4e96c6377db90d6cec7
--- /dev/null
+++ b/client/internal/retry/retry_test.go
@@ -0,0 +1,70 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package retry
+
+import (
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/maruel/ut"
+)
+
+func TestDoOnce(t *testing.T) {
+	c := &Config{1, 0, 0, 0}
+	r := &retriable{}
+	ut.AssertEqual(t, nil, c.Do(r))
+	ut.AssertEqual(t, 1, r.closed)
+	ut.AssertEqual(t, 1, r.tries)
+}
+
+func TestDoRetryExceeded(t *testing.T) {
+	c := &Config{1, 0, 0, 0}
+	r := &retriable{errs: []error{errRetry}}
+	ut.AssertEqual(t, errRetry, c.Do(r))
+	ut.AssertEqual(t, 1, r.closed)
+	ut.AssertEqual(t, 1, r.tries)
+}
+
+func TestDoRetry(t *testing.T) {
+	c := &Config{2, 0, time.Millisecond, 0}
+	r := &retriable{errs: []error{errRetry}}
+	ut.AssertEqual(t, nil, c.Do(r))
+	ut.AssertEqual(t, 1, r.closed)
+	ut.AssertEqual(t, 2, r.tries)
+}
+
+func TestError(t *testing.T) {
+	ut.AssertEqual(t, "please try again", errRetry.Error())
+}
+
+// Private details.
+
+var errYo = errors.New("yo")
+var errRetry = Error{errors.New("please try again")}
+
+type retriable struct {
+	closed int
+	tries  int
+	errs   []error
+}
+
+func (r *retriable) Close() error {
+	r.closed++
+	if r.closed > 1 {
+		return errYo
+	}
+	return nil
+}
+
+func (r *retriable) Do() error {
+	r.tries++
+	if len(r.errs) != 0 {
+		err := r.errs[0]
+		r.errs = r.errs[1:]
+		return err
+	}
+	return nil
+}