func HelloV2() string {
	return sampler.Hello()
}

// Glass returns a useful phrase for world travelers.
func GlassV2() string {
	// See http://www.oocities.org/nodotus/hbglass.html.
	return "I can eat glass and it doesn't hurt me."
}

// Go returns a Go proverb.
func GoV2() string {
	return "Don't communicate by sharing memory, share memory by communicating."
}

// Opt returns an optimization truth.

func Hello() string {
	return sampler.Hello()
}

// Glass returns a useful phrase for world travelers.
func Glass() string {
	// See http://www.oocities.org/nodotus/hbglass.html.
	return "I can eat glass and it doesn't hurt me."
}

// Go returns a Go proverb.
func Go() string {
	return "Don't communicate by sharing memory, share memory by communicating."
}

// Opt returns an optimization truth.

func Hello() string {
	return sampler.Hello()
}

// Glass returns a useful phrase for world travelers.
func Glass() string {
	// See http://www.oocities.org/nodotus/hbglass.html.
	return "I can eat glass and it doesn't hurt me."
}

// Go returns a Go proverb.
func Go() string {
	return "Don't communicate by sharing memory, share memory by communicating."
}

// Opt returns an optimization truth.

// See http://kermitproject.org/utf8.html.
// http://www.oocities.org/nodotus/hbglass.html
// https://en.wikipedia.org/wiki/I_Can_Eat_Glass

package sampler

var glass = newText(`

English: en: I can eat glass and it doesn't hurt me.
French: fr: Je peux manger du verre, ça ne me fait pas mal.
Spanish: es: Puedo comer vidrio, no me hace daño.

`)
-- glass_test.go --
// Copyright 2018 The Go Authors. All rights reserved.

// See http://kermitproject.org/utf8.html.
// http://www.oocities.org/nodotus/hbglass.html
// https://en.wikipedia.org/wiki/I_Can_Eat_Glass

package sampler

var glass = newText(`

English: en: I can eat glass and it doesn't hurt me.
French: fr: Je peux manger du verre, ça ne me fait pas mal.
Spanish: es: Puedo comer vidrio, no me hace daño.

`)
-- glass_test.go --
// Copyright 2018 The Go Authors. All rights reserved.

	{"start$+middle$^end$", "start$+middle$^end$"},
	{"mixed$|bag$$$", "mixed$|bagPID$"},
	{"$", "$"},
	{"$}", "$}"},
	{"${", ""},  // invalid syntax; eat up the characters
	{"${}", ""}, // invalid syntax; eat up the characters
}

func TestExpand(t *testing.T) {
	for _, test := range expandTests {
		result := Expand(test.in, testGetenv)
		if result != test.out {

func HelloV3() string {
	return sampler.Hello()
}

// Glass returns a useful phrase for world travelers.
func GlassV3() string {
	// See http://www.oocities.org/nodotus/hbglass.html.
	return "I can eat glass and it doesn't hurt me."
}

// Go returns a Go proverb.
func GoV3() string {
	return "Don't communicate by sharing memory, share memory by communicating."
}

// Opt returns an optimization truth.

}

func TestHELLO(t *testing.T) {
	hello := "HELLO, WORLD"
	if out := HELLO(); out != hello {
		t.Errorf("HELLO() = %q, want %q", out, hello)
	}
}

func TestGLASS(t *testing.T) {
	glass := "I CAN EAT GLASS AND IT DOESN'T HURT ME."
	if out := GLASS(); out != glass {
		t.Errorf("GLASS() = %q, want %q", out, glass)
	}
}

func TestGO(t *testing.T) {

}

func TestHELLO(t *testing.T) {
	hello := "HELLO, WORLD"
	if out := HELLO(); out != hello {
		t.Errorf("HELLO() = %q, want %q", out, hello)
	}
}

func TestGLASS(t *testing.T) {
	glass := "I CAN EAT GLASS AND IT DOESN'T HURT ME."
	if out := GLASS(); out != glass {
		t.Errorf("GLASS() = %q, want %q", out, glass)
	}
}

func TestGO(t *testing.T) {

	testFiles(t, global, "testdata/glass.txt", "I can eat glass and it doesn't hurt me.\n")

	if err := fstest.TestFS(global, "concurrency.txt", "testdata/hello.txt"); err != nil {
		t.Fatal(err)
	}

	testString(t, concurrency, "concurrency", "Concurrency is not parallelism.\n")
	testString(t, string(glass), "glass", "I can eat glass and it doesn't hurt me.\n")
}

//go:embed testdata
var testDirAll embed.FS