internal/export/idna: hoist conformance test

in preparation to deal with the new file format
in Unicode 11.

Updates golang/go#27945

Change-Id: I424b3891e852c87bea536646a98a96aae2446294
Reviewed-on: https://go-review.googlesource.com/c/text/+/154441
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Author: mpvl

internal/export/idna/conformance_test.go

@@ -0,0 +1,70 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package idna
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"golang.org/x/text/internal/gen"
+	"golang.org/x/text/internal/testtext"
+	"golang.org/x/text/internal/ucd"
+)
+
+func TestConformance(t *testing.T) {
+	testtext.SkipIfNotLong(t)
+
+	r := gen.OpenUnicodeFile("idna", "", "IdnaTest.txt")
+	defer r.Close()
+
+	section := "main"
+	p := ucd.New(r)
+	transitional := New(Transitional(true), VerifyDNSLength(true), BidiRule(), MapForLookup())
+	nonTransitional := New(VerifyDNSLength(true), BidiRule(), MapForLookup())
+	for p.Next() {
+		// What to test
+		profiles := []*Profile{}
+		switch p.String(0) {
+		case "T":
+			profiles = append(profiles, transitional)
+		case "N":
+			profiles = append(profiles, nonTransitional)
+		case "B":
+			profiles = append(profiles, transitional)
+			profiles = append(profiles, nonTransitional)
+		}
+
+		src := unescape(p.String(1))
+
+		wantToUnicode := unescape(p.String(2))
+		if wantToUnicode == "" {
+			wantToUnicode = src
+		}
+		wantToASCII := unescape(p.String(3))
+		if wantToASCII == "" {
+			wantToASCII = wantToUnicode
+		}
+		wantErrToUnicode := ""
+		if strings.HasPrefix(wantToUnicode, "[") {
+			wantErrToUnicode = wantToUnicode
+			wantToUnicode = ""
+		}
+		wantErrToASCII := ""
+		if strings.HasPrefix(wantToASCII, "[") {
+			wantErrToASCII = wantToASCII
+			wantToASCII = ""
+		}
+
+		// TODO: also do IDNA tests.
+		// invalidInIDNA2008 := p.String(4) == "NV8"
+
+		for _, p := range profiles {
+			name := fmt.Sprintf("%s:%s", section, p)
+			doTest(t, p.ToUnicode, name+":ToUnicode", src, wantToUnicode, wantErrToUnicode)
+			doTest(t, p.ToASCII, name+":ToASCII", src, wantToASCII, wantErrToASCII)
+		}
+	}
+}

internal/export/idna/idna_test.go

@@ -10,9 +10,7 @@ import (
 	"strings"
 	"testing"
 
-	"golang.org/x/text/internal/gen"
 	"golang.org/x/text/internal/testtext"
-	"golang.org/x/text/internal/ucd"
 )
 
 func TestAllocToUnicode(t *testing.T) {
@@ -101,68 +99,6 @@ func doTest(t *testing.T, f func(string) (string, error), name, input, want, err
 	})
 }
 
-func TestConformance(t *testing.T) {
-	testtext.SkipIfNotLong(t)
-
-	r := gen.OpenUnicodeFile("idna", "", "IdnaTest.txt")
-	defer r.Close()
-
-	section := "main"
-	started := false
-	p := ucd.New(r, ucd.CommentHandler(func(s string) {
-		if started {
-			section = strings.ToLower(strings.Split(s, " ")[0])
-		}
-	}))
-	transitional := New(Transitional(true), VerifyDNSLength(true), BidiRule(), MapForLookup())
-	nonTransitional := New(VerifyDNSLength(true), BidiRule(), MapForLookup())
-	for p.Next() {
-		started = true
-
-		// What to test
-		profiles := []*Profile{}
-		switch p.String(0) {
-		case "T":
-			profiles = append(profiles, transitional)
-		case "N":
-			profiles = append(profiles, nonTransitional)
-		case "B":
-			profiles = append(profiles, transitional)
-			profiles = append(profiles, nonTransitional)
-		}
-
-		src := unescape(p.String(1))
-
-		wantToUnicode := unescape(p.String(2))
-		if wantToUnicode == "" {
-			wantToUnicode = src
-		}
-		wantToASCII := unescape(p.String(3))
-		if wantToASCII == "" {
-			wantToASCII = wantToUnicode
-		}
-		wantErrToUnicode := ""
-		if strings.HasPrefix(wantToUnicode, "[") {
-			wantErrToUnicode = wantToUnicode
-			wantToUnicode = ""
-		}
-		wantErrToASCII := ""
-		if strings.HasPrefix(wantToASCII, "[") {
-			wantErrToASCII = wantToASCII
-			wantToASCII = ""
-		}
-
-		// TODO: also do IDNA tests.
-		// invalidInIDNA2008 := p.String(4) == "NV8"
-
-		for _, p := range profiles {
-			name := fmt.Sprintf("%s:%s", section, p)
-			doTest(t, p.ToUnicode, name+":ToUnicode", src, wantToUnicode, wantErrToUnicode)
-			doTest(t, p.ToASCII, name+":ToASCII", src, wantToASCII, wantErrToASCII)
-		}
-	}
-}
-
 func unescape(s string) string {
 	s, err := strconv.Unquote(`"` + s + `"`)
 	if err != nil {