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// Copyright 2017 Canonical Ltd.
// Licensed under the LGPLv3, see LICENSE file for details.
package cmdtesting_test
import (
"fmt"
"io"
"strconv"
"strings"
"github.com/juju/errors"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
"github.com/juju/cmd/v3/cmdtesting"
)
type prompterSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(&prompterSuite{})
func (*prompterSuite) TestPrompter(c *gc.C) {
noPrompt := func(p string) (string, error) {
c.Fatalf("unpexected prompt (text %q)", p)
panic("unreachable")
}
promptFn := noPrompt
p := cmdtesting.NewPrompter(func(p string) (string, error) {
return promptFn(p)
})
promptText := "hello: "
promptReply := "reply\n"
fmt.Fprint(p, promptText)
promptFn = func(p string) (string, error) {
c.Assert(p, gc.Equals, promptText)
return promptReply, nil
}
c.Assert(readStr(c, p, 20), gc.Equals, promptReply)
promptText = "some text\ngoodbye: "
promptReply = "again\n"
fmt.Fprint(p, promptText[0:10])
fmt.Fprint(p, promptText[10:])
c.Assert(readStr(c, p, 3), gc.Equals, promptReply[0:3])
c.Assert(readStr(c, p, 20), gc.Equals, promptReply[3:])
fmt.Fprint(p, "final text\n")
c.Assert(p.Tail(), gc.Equals, "final text\n")
c.Assert(p.HasUnread(), gc.Equals, false)
}
func (*prompterSuite) TestUnreadInput(c *gc.C) {
p := cmdtesting.NewPrompter(func(s string) (string, error) {
return "hello world", nil
})
c.Assert(readStr(c, p, 3), gc.Equals, "hel")
c.Assert(p.HasUnread(), gc.Equals, true)
}
func (*prompterSuite) TestError(c *gc.C) {
expectErr := errors.New("something")
p := cmdtesting.NewPrompter(func(s string) (string, error) {
return "", expectErr
})
buf := make([]byte, 3)
n, err := p.Read(buf)
c.Assert(n, gc.Equals, 0)
c.Assert(err, gc.Equals, expectErr)
}
func (*prompterSuite) TestSeqPrompter(c *gc.C) {
p := cmdtesting.NewSeqPrompter(c, "»", `
hello: »reply
some text
goodbye: »again
final
`[1:])
fmt.Fprint(p, "hello: ")
c.Assert(readStr(c, p, 1), gc.Equals, "r")
c.Assert(readStr(c, p, 20), gc.Equals, "eply\n")
fmt.Fprint(p, "some text\n")
fmt.Fprint(p, "goodbye: ")
c.Assert(readStr(c, p, 20), gc.Equals, "again\n")
fmt.Fprint(p, "final\n")
p.AssertDone()
}
func (*prompterSuite) TestSeqPrompterEOF(c *gc.C) {
p := cmdtesting.NewSeqPrompter(c, "»", `
hello: »»
final
`[1:])
fmt.Fprint(p, "hello: ")
n, err := p.Read(make([]byte, 10))
c.Assert(n, gc.Equals, 0)
c.Assert(err, gc.Equals, io.EOF)
fmt.Fprint(p, "final\n")
p.AssertDone()
}
func (*prompterSuite) TestNewIOChecker(c *gc.C) {
checker := cmdtesting.NewSeqPrompter(c, "»", `What is your name: »Bob
»more
And your age: »148
You're .* old, Bob
more!
`)
fmt.Fprintf(checker, "What is your name: ")
buf := make([]byte, 100)
n, _ := checker.Read(buf)
name := strings.TrimSpace(string(buf[0:n]))
fmt.Fprintf(checker, "And your age: ")
n, _ = checker.Read(buf)
age, err := strconv.Atoi(strings.TrimSpace(string(buf[0:n])))
c.Assert(err, gc.IsNil)
if age > 90 {
fmt.Fprintf(checker, "You're very old, %s!\n", name)
}
checker.CheckDone()
}
func readStr(c *gc.C, r io.Reader, nb int) string {
buf := make([]byte, nb)
n, err := r.Read(buf)
c.Assert(err, jc.ErrorIsNil)
return string(buf[0:n])
}
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