}

        private void validateExcludes() {
            for (ExcludeRule excludeRule : getMd().getAllExcludeRules()) {
                for (String conf : excludeRule.getConfigurations()) {
                    if (getMd().getConfiguration(conf) == null) {
                        throw new IllegalArgumentException("Exclude rule " + excludeRule.getId() + " is mapped to configuration '" + conf + "' which is not declared.");
                    }

            src = src.getConsistentResolutionSource();
        }
    }

    @Nullable
    private DependencyConstraint registerConsistentResolutionConstraint(ResolvedComponentResult result) {
        if (result.getId() instanceof ModuleComponentIdentifier) {
            ModuleVersionIdentifier moduleVersion = result.getModuleVersion();
            DefaultDependencyConstraint constraint = DefaultDependencyConstraint.strictly(

	if err := testenv.Command(t, "strace", "-f", "-q", os.Args[0], "-test.run=^$").Run(); err != nil {
		t.Skipf("skipping; failed to run strace: %v", err)
	}

	filename := fmt.Sprintf("1kb-%d", os.Getpid())
	filepath := path.Join(os.TempDir(), filename)

	if err := os.WriteFile(filepath, bytes.Repeat([]byte{'a'}, 1<<10), 0755); err != nil {
		t.Fatal(err)
	}
	defer os.Remove(filepath)

// Temp files created in default Tmp dir
var globalTestTmpDir = os.TempDir()

// reseed - returns a new seed every time the function is called.
func reseed() uint32 {
	return uint32(time.Now().UnixNano() + int64(os.Getpid()))
}

// nextSuffix - provides a new unique suffix every time the function is called.
func nextSuffix() string {
	randmu.Lock()
	r := randN
	// Initial seed required, generate one.
	if r == 0 {

			select {
			case <-done:
				return
			case <-hold:
			}
			// Getwd might be wrong
			f0, err := Stat(".")
			if err != nil {
				t.Error(err)
				return
			}
			pwd, err := Getwd()
			if err != nil {
				t.Errorf("Getwd: %v", err)
				return
			}
			if pwd != d {
				t.Errorf("Getwd() = %q, want %q", pwd, d)
				return
			}
			f1, err := Stat(pwd)