mirror of
https://github.com/dnote/dnote
synced 2026-03-14 14:35:50 +01:00
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
/* Copyright (C) 2019, 2020, 2021, 2022, 2023, 2024, 2025 Dnote contributors
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*
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* This file is part of Dnote.
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*
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* Dnote is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Dnote is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Dnote. If not, see <https://www.gnu.org/licenses/>.
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*/
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package assert
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import (
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"bufio"
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"io"
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"strings"
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"time"
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"github.com/pkg/errors"
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)
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// WaitForPrompt waits for an expected prompt to appear in stdout with a timeout.
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// Returns an error if the prompt is not found within the timeout period.
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// Handles prompts with or without newlines by reading character by character.
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func WaitForPrompt(stdout io.Reader, expectedPrompt string, timeout time.Duration) error {
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type result struct {
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found bool
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err error
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}
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resultCh := make(chan result, 1)
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go func() {
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reader := bufio.NewReader(stdout)
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var buffer strings.Builder
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found := false
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for {
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b, err := reader.ReadByte()
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if err != nil {
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resultCh <- result{found: found, err: err}
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return
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}
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buffer.WriteByte(b)
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if strings.Contains(buffer.String(), expectedPrompt) {
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found = true
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break
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}
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}
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resultCh <- result{found: found, err: nil}
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}()
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select {
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case res := <-resultCh:
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if res.err != nil && res.err != io.EOF {
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return errors.Wrap(res.err, "reading stdout")
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}
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if !res.found {
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return errors.Errorf("expected prompt '%s' not found in stdout", expectedPrompt)
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}
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return nil
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case <-time.After(timeout):
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return errors.Errorf("timeout waiting for prompt '%s'", expectedPrompt)
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}
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}
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// RespondToPrompt is a helper that waits for a prompt and sends a response.
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func RespondToPrompt(stdout io.Reader, stdin io.WriteCloser, expectedPrompt, response string, timeout time.Duration) error {
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if err := WaitForPrompt(stdout, expectedPrompt, timeout); err != nil {
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return err
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}
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if _, err := io.WriteString(stdin, response); err != nil {
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return errors.Wrap(err, "writing response to stdin")
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}
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return nil
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}
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