2 files changed, 41 insertions, 32 deletions
diff --git a/skate/reduce_test.go b/skate/reduce_test.go
index 78939a1..4ff2508 100644
--- a/skate/reduce_test.go
+++ b/skate/reduce_test.go
@@ -2,12 +2,11 @@ package skate
 
 import (
 	"bytes"
-	"io/ioutil"
 	"reflect"
 	"testing"
 	"time"
 
-	"git.archive.org/martin/cgraph/skate/atomic"
+	"git.archive.org/martin/cgraph/skate/testutil"
 	"git.archive.org/martin/cgraph/skate/xio"
 	"github.com/kr/pretty"
 )
@@ -421,47 +420,21 @@ func TestZippyExact(t *testing.T) {
 		if err != c.err {
 			t.Errorf("[%d] got %v, want %v", i, err, c.err)
 		}
-		ok, err := equalsFilename(&buf, c.out)
+		ok, err := testutil.EqualsFilename(&buf, c.out)
 		if err != nil {
 			t.Errorf("failed to open test file: %v", c.out)
 		}
 		if !ok {
-			filename, err := tempWriteFile(&buf)
+			filename, err := testutil.TempWriteFile(&buf)
 			if err != nil {
 				t.Logf("could not write temp file")
 			}
-			t.Errorf("[%d] output mismatch (buffer length=%d, content=%v), want %v", i, buf.Len(), filename, c.out)
+			t.Errorf("[%d] output mismatch (buffer length=%d, content=%v), want %v",
+				i, buf.Len(), filename, c.out)
 		}
 	}
 }
 
-// equalsFilename returns true, if the contents of a given buffer matches the
-// contents of a file given by filename.
-func equalsFilename(buf *bytes.Buffer, filename string) (bool, error) {
-	b, err := ioutil.ReadFile(filename)
-	if err != nil {
-		return false, err
-	}
-	bb := buf.Bytes()
-	if len(bb) == 0 && len(b) == 0 {
-		return true, nil
-	}
-	return reflect.DeepEqual(b, bb), nil
-}
-
-// tempWriteFile writes the content of a buffer to a temporary file and returns
-// its path.
-func tempWriteFile(buf *bytes.Buffer) (string, error) {
-	f, err := ioutil.TempFile("", "skate-test-*")
-	if err != nil {
-		return "", err
-	}
-	if err = atomic.WriteFile(f.Name(), buf.Bytes(), 0755); err != nil {
-		return "", err
-	}
-	return f.Name(), nil
-}
-
 func TestCutBatch(t *testing.T) {
 	var cases = []struct {
 		lines  []string
diff --git a/skate/testutil/extra.go b/skate/testutil/extra.go
new file mode 100644
index 0000000..cb533c3
--- /dev/null
+++ b/skate/testutil/extra.go
@@ -0,0 +1,36 @@
+package testutil
+
+import (
+	"bytes"
+	"io/ioutil"
+	"reflect"
+
+	"git.archive.org/martin/cgraph/skate/atomic"
+)
+
+// EqualsFilename returns true, if the contents of a given buffer matches the
+// contents of a file given by filename.
+func EqualsFilename(buf *bytes.Buffer, filename string) (bool, error) {
+	b, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return false, err
+	}
+	bb := buf.Bytes()
+	if len(bb) == 0 && len(b) == 0 {
+		return true, nil
+	}
+	return reflect.DeepEqual(b, bb), nil
+}
+
+// TempWriteFile writes the content of a buffer to a temporary file and returns
+// its path.
+func TempWriteFile(buf *bytes.Buffer) (string, error) {
+	f, err := ioutil.TempFile("", "skate-test-*")
+	if err != nil {
+		return "", err
+	}
+	if err = atomic.WriteFile(f.Name(), buf.Bytes(), 0755); err != nil {
+		return "", err
+	}
+	return f.Name(), nil
+}