package app

import (
	"context"
	"testing"
	"time"
)

// Test utility functions from batch_runtime.go

func TestSleepWithContext_Normal(t *testing.T) {
	ctx := context.Background()
	start := time.Now()
	err := sleepWithContext(ctx, 1*time.Millisecond)
	elapsed := time.Since(start)

	if err != nil {
		t.Errorf("sleep should not error: %v", err)
	}
	if elapsed < 1*time.Millisecond {
		t.Error("should have slept")
	}
}

func TestSleepWithContext_Canceled(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	start := time.Now()
	err := sleepWithContext(ctx, 100*time.Millisecond)
	elapsed := time.Since(start)

	if err == nil {
		t.Error("canceled context should return error")
	}
	if elapsed > 10*time.Millisecond {
		t.Error("should have returned early due to cancellation")
	}
}

func TestFirstNonEmptyString(t *testing.T) {
	if firstNonEmptyString("", "", "value") != "value" {
		t.Error("should return first non-empty")
	}
}

func TestFirstNonEmptyString_First(t *testing.T) {
	if firstNonEmptyString("first", "second", "third") != "first" {
		t.Error("should return first value when all non-empty")
	}
}

func TestFirstNonEmptyString_AllEmpty(t *testing.T) {
	if firstNonEmptyString("", "", "") != "" {
		t.Error("all empty should return empty")
	}
}