t.Fatal(err)
	}
}

const testar = `#!/usr/bin/env bash
while [[ $1 == -* ]] >/dev/null; do
  shift
done
echo "testar" > $1
echo "testar" > PWD/testar.ran
`

func TestExtar(t *testing.T) {
	switch GOOS {
	case "windows":
		t.Skip("skipping signal test on Windows")
	}
	if runtime.Compiler == "gccgo" {
		t.Skip("skipping -extar test when using gccgo")
	}
	globalSkip(t)

	"golang.org/x/telemetry/counter/countertest"
)

var testSum = flag.String("testsum", "", `may be tidy, listm, or listall. If set, TestScript generates a go.sum file at the beginning of each test and updates test files if they pass.`)

// TestScript runs the tests in testdata/script/*.txt.
func TestScript(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	testenv.SkipIfShortAndSlow(t)

	srv, err := vcstest.NewServer()
	if err != nil {

// to have "test" before them, and reading the command line for the test binary.
// Unfortunately for us, we need to do our own flag processing because go test
// grabs some flags but otherwise its command line is just a holding place for
// pkg.test's arguments.
// We allow known flags both before and after the package name list,
// to allow both
//
//	go test fmt -custom-flag-for-fmt-test
//	go test -x math

var gitrepo1, hgrepo1, vgotest1 string

var altRepos = func() []string {
	return []string{
		"localGitRepo",
		hgrepo1,
	}
}

// TODO: Convert gitrepo1 to svn, bzr, fossil and add tests.
// For now, at least the hgrepo1 tests check the general vcs.go logic.

// localGitRepo is like gitrepo1 but allows archive access
// (although that doesn't really matter after CL 120041),
// and has a file:// URL instead of http:// or https://

// TestMain used here so that we can leverage the test executable
// itself as a cmd/covdata executable; compare to similar usage in
// the cmd/go tests.
func TestMain(m *testing.M) {
	// When CMDCOVDATA_TEST_RUN_MAIN is set, we're reusing the test
	// binary as cmd/cover. In this case we run the main func exported
	// via export_test.go, and exit; CMDCOVDATA_TEST_RUN_MAIN is set below
	// for actual test invocations.

// sorted sequence of disjoint ranges or intervals. An Intervals
// example: { [0,5) [9-12) [100,101) }, which corresponds to the
// numbers 0-4, 9-11, and 100. Once an Intervals object is created, it
// can be tested to see if it has any overlap with another Intervals
// object, or it can be merged with another Intervals object to form a
// union of the two.
//
// The intended use case for this helper is in describing object or

			nif := ir.NewIfStmt(base.Pos.WithNotStmt(), typecheck.DefaultLit(typecheck.Expr(c.test(expr)), nil), []ir.Node{c.jmp}, nil)
			out.Append(nif)
			out = &nif.Else
		}
		return
	}

	// The strategy here is to find a simple test to divide the set of possible strings
	// that might match expr approximately in half.
	// The test we're going to use is to do an ordered comparison of a single byte

	if cur == dst {
		return
	}
	seen.Set(cur)
	l, r := po.chl(cur), po.chr(cur)
	if !seen.Test(l) {
		po.findpaths1(l, dst, seen, path)
	}
	if !seen.Test(r) {
		po.findpaths1(r, dst, seen, path)
	}
	if path.Test(l) || path.Test(r) {
		path.Set(cur)
	}
}

// Check whether it is recorded that i1!=i2
func (po *poset) isnoneq(i1, i2 uint32) bool {

A1: B1 C1
B1: C1
C1:
req M A B: A1 B1
`

func Test(t *testing.T) {
	var (
		name string
		reqs reqsMap
		fns  []func(*testing.T)
	)
	flush := func() {
		if name != "" {
			t.Run(name, func(t *testing.T) {
				for _, fn := range fns {
					fn(t)
				}
				if len(fns) == 0 {
					t.Errorf("no functions tested")
				}
			})
		}
	}
	m := func(s string) module.Version {

	expectFalse(t, fmt.Sprintf("%v==%v", a, b), c2)
	expectFalse(t, fmt.Sprintf("%v!=%v", a, a), c3)
	expectTrue(t, fmt.Sprintf("%v!=%v", a, b), c4)
}

// TestFP tests that we get the right answer for floating point expressions.
func TestFP(t *testing.T) {
	a := 3.0
	b := 4.0

	c := float32(3.0)
	d := float32(4.0)

	tiny := float32(1.5e-45) // smallest f32 denorm = 2**(-149)