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package release
import (
"os"
"testing"
)
// withStdin temporarily replaces os.Stdin with r for the duration of fn, then
// restores the original value. Not run in parallel with other tests since
// os.Stdin is a shared global.
func withStdin(t *testing.T, r *os.File, fn func()) {
t.Helper()
original := os.Stdin
os.Stdin = r
defer func() { os.Stdin = original }()
fn()
}
// TestPromptConfirmation_EmptyInputDeclines verifies that when Scanln
// returns an error (e.g. a bare newline, which fmt.Scanln reports as
// "unexpected newline"), PromptConfirmation still safely defaults to
// declining rather than panicking or hanging - this is the discarded-error
// behavior that PromptConfirmation's fmt.Scanln call relies on.
func TestPromptConfirmation_EmptyInputDeclines(t *testing.T) {
r, w, err := os.Pipe()
if err != nil {
t.Fatalf("failed to create pipe: %v", err)
}
defer func() { _ = r.Close() }()
if _, err := w.WriteString("\n"); err != nil {
t.Fatalf("failed to write to pipe: %v", err)
}
if err := w.Close(); err != nil {
t.Fatalf("failed to close pipe writer: %v", err)
}
var got bool
withStdin(t, r, func() {
got = PromptConfirmation("Proceed?")
})
if got {
t.Fatal("PromptConfirmation() = true for empty input, want false")
}
}
// TestPromptConfirmation_YesInputConfirms is a regression check that the
// happy path (explicit "y") still works after touching the Scanln call.
func TestPromptConfirmation_YesInputConfirms(t *testing.T) {
r, w, err := os.Pipe()
if err != nil {
t.Fatalf("failed to create pipe: %v", err)
}
defer func() { _ = r.Close() }()
if _, err := w.WriteString("y\n"); err != nil {
t.Fatalf("failed to write to pipe: %v", err)
}
if err := w.Close(); err != nil {
t.Fatalf("failed to close pipe writer: %v", err)
}
var got bool
withStdin(t, r, func() {
got = PromptConfirmation("Proceed?")
})
if !got {
t.Fatal("PromptConfirmation() = false for \"y\" input, want true")
}
}
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