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printer.go
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printer.go
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/*
Copyright (C) 2022-2023 ApeCloud Co., Ltd
This file is part of KubeBlocks project
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package testing
import (
"io"
"os"
"strings"
)
// Capture replaces os.Stdout with a writer that buffers any data written
// to os.Stdout. Call the returned function to clean up and return the data
// as a string.
func Capture() func() (string, error) {
r, w, err := os.Pipe()
if err != nil {
panic(err)
}
done := make(chan error, 1)
save := os.Stdout
os.Stdout = w
var buf strings.Builder
go func() {
_, err := io.Copy(&buf, r)
r.Close()
done <- err
}()
return func() (string, error) {
os.Stdout = save
w.Close()
err := <-done
return buf.String(), err
}
}
// ContainExpectStrings checks if the specific string contains the expected strings.
func ContainExpectStrings(out string, expectStrings ...string) bool {
for i := range expectStrings {
if !strings.Contains(out, expectStrings[i]) {
return false
}
}
return true
}