// Copyright 2022 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package utils_test

import (
	"fmt"
	"sync/atomic"
	"testing"

	"dawn.googlesource.com/dawn/tools/src/utils"
)

func TestRunConcurrent(t *testing.T) {
	var i uint32
	err := utils.RunConcurrent(8, func() error {
		atomic.AddUint32(&i, 1)
		return nil
	})
	if err != nil {
		t.Errorf("utils.RunConcurrent() returned %v", err)
	}
	if n := atomic.LoadUint32(&i); n != 8 {
		t.Errorf("i is %v", n)
	}
}

func TestRunConcurrentError(t *testing.T) {
	err := utils.RunConcurrent(8, func() error {
		return fmt.Errorf("error")
	})
	if err == nil {
		t.Errorf("utils.RunConcurrent() returned no error")
	}
}