package main

import (
	"testing"
	"time"
)

func TestFocusTimer_Set(t *testing.T) {
	var ft FocusTimer
	ft.Set(30 * time.Minute)
	if !ft.IsActive() {
		t.Error("IsActive() = false after Set(30min), want true")
	}
}

func TestFocusTimer_Expired(t *testing.T) {
	var ft FocusTimer
	ft.Set(0)
	if ft.IsActive() {
		t.Error("IsActive() = true after Set(0), want false")
	}
}

func TestFocusTimer_Remaining(t *testing.T) {
	var ft FocusTimer
	ft.Set(30 * time.Minute)
	rem := ft.Remaining()
	if rem <= 0 {
		t.Errorf("Remaining() = %v, want > 0", rem)
	}
	if rem > 30*time.Minute {
		t.Errorf("Remaining() = %v, want <= 30min", rem)
	}
}

func TestFocusTimer_ZeroValue(t *testing.T) {
	var ft FocusTimer
	if ft.IsActive() {
		t.Error("zero-value FocusTimer IsActive() = true, want false")
	}
	if ft.Remaining() != 0 {
		t.Errorf("zero-value Remaining() = %v, want 0", ft.Remaining())
	}
}