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// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Paul Buetow
package repl
import (
"strings"
"testing"
)
func TestTTYCheckerEnsureTTYNotATerminal(t *testing.T) {
// In test context, stdin is never a terminal
checker := &TTYChecker{}
err := checker.EnsureTTY()
if err == nil {
t.Error("EnsureTTY should return an error when stdin is not a TTY")
}
}
func TestTTYCheckerEnsureTTYErrorMessage(t *testing.T) {
checker := &TTYChecker{}
err := checker.EnsureTTY()
if err == nil {
t.Skip("stdin appears to be a TTY; skipping error message check")
}
if !strings.Contains(err.Error(), "TTY") {
t.Errorf("error message should mention TTY, got: %q", err.Error())
}
}
func TestTTYCheckerIsTTYReturnsFalseInTests(t *testing.T) {
// In test context, stdin is not a terminal
checker := &TTYChecker{}
if checker.IsTTY() {
t.Skip("stdin appears to be a TTY (e.g., interactive terminal); skipping")
}
// Good — IsTTY correctly returned false
}
func TestTTYCheckerIsTTYConsistentWithEnsureTTY(t *testing.T) {
checker := &TTYChecker{}
isTTY := checker.IsTTY()
err := checker.EnsureTTY()
if isTTY && err != nil {
t.Error("IsTTY returned true but EnsureTTY returned an error")
}
if !isTTY && err == nil {
t.Error("IsTTY returned false but EnsureTTY returned nil")
}
}
func TestTTYCheckerMultipleCalls(t *testing.T) {
checker := &TTYChecker{}
// Multiple calls should be consistent
result1 := checker.IsTTY()
result2 := checker.IsTTY()
if result1 != result2 {
t.Errorf("IsTTY returned inconsistent results: %v, %v", result1, result2)
}
err1 := checker.EnsureTTY()
err2 := checker.EnsureTTY()
// Both errors should be the same type (both nil or both non-nil)
bothNil := err1 == nil && err2 == nil
bothNonNil := err1 != nil && err2 != nil
if !bothNil && !bothNonNil {
t.Errorf("EnsureTTY returned inconsistent results: %v, %v", err1, err2)
}
}
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