Test File.Split and use -update flag

CHANGELOG.md

@@ -18,6 +18,10 @@ Security   invites users to upgrade in case of vulnerabilities.
 [Unreleased]
 ------------
 
+### Added
+- `func (f File) Split(sep string) []string`
+  - Split the file into a string slice using separator sep.
+
 
 [0.2.0] - 2016-11-07
 --------------------
@@ -41,5 +45,5 @@ Security   invites users to upgrade in case of vulnerabilities.
 - Initial public release under the MIT license.
 
 
-[Unreleased]: https://github.com/nochso/golden/compare/0.1.0...HEAD
+[Unreleased]: https://github.com/nochso/golden/compare/0.2.0...HEAD
 [0.2.0]: https://github.com/nochso/golden/compare/0.1.0...0.2.0

golden_test.go

@@ -2,11 +2,16 @@ package golden
 
 import (
 	"bytes"
+	"flag"
 	"io/ioutil"
 	"os"
 	"testing"
+
+	"github.com/k0kubun/pp"
 )
 
+var update = flag.Bool("update", false, "update golden files")
+
 func TestFile(t *testing.T) {
 	c := NewCase(t, "test-fixtures/in.txt")
 	exp := []byte("abc")
@@ -37,17 +42,30 @@ func TestFile_Update(t *testing.T) {
 func TestCase_Diff(t *testing.T) {
 	c := NewCase(t, "test-fixtures/in.txt")
 	act := bytes.Repeat(c.In.Bytes(), 2)
+	if *update {
+		c.Out.Update(act)
+	}
 	c.Diff(string(act))
 }
 
 func TestDirSlice(t *testing.T) {
 	cases := DirSlice(t, "test-fixtures")
-	expLen := 1
+	expLen := 2
 	if expLen != len(cases) {
 		t.Errorf("expected %d case; got %d", expLen, len(cases))
 	}
 }
 
+func TestFile_Split(t *testing.T) {
+	c := NewCase(t, "test-fixtures/split.txt")
+	s := c.In.Split("===")
+	pp.ColoringEnabled = false
+	if *update {
+		c.Out.Update([]byte(pp.Sprint(s)))
+	}
+	c.Diff(pp.Sprint(s))
+}
+
 func bEqual(t *testing.T, exp, act []byte) {
 	if !bytes.Equal(exp, act) {
 		t.Fatal(diff(t, exp, act))

test-fixtures/split.txt

@@ -0,0 +1,16 @@
+this part will not have a new line
+===
+this one will have a trailing one
+
+===
+
+this one has a leading one
+===
+
+this one has both
+
+===
+
+
+two new lines each
+

test-fixtures/split.txt.golden

@@ -0,0 +1,7 @@
+[]string{
+  "this part will not have a new line",
+  "this one will have a trailing one\n",
+  "\nthis one has a leading one",
+  "\nthis one has both\n",
+  "\n\ntwo new lines each\n\n",
+}