initial import

core/iox/textfile_test.go

@@ -0,0 +1,27 @@
+package iox
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCountLines(t *testing.T) {
+	const val = `1
+2
+3
+4`
+	file, err := ioutil.TempFile(os.TempDir(), "test-")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(file.Name())
+
+	file.WriteString(val)
+	file.Close()
+	lines, err := CountLines(file.Name())
+	assert.Nil(t, err)
+	assert.Equal(t, 4, lines)
+}