add TestCleanText

1 files changed, 52 insertions, 0 deletions

diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..b572fd2
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,52 @@
+// Copyright (C) 2020 Evgeny Kuznetsov (evgeny@kuznetsov.md)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along tihe this program. If not, see <https://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"bytes"
+	"flag"
+	"io/ioutil"
+	"path/filepath"
+	"testing"
+)
+
+var update = flag.Bool("update", false, "update .golden files")
+
+func helperLoadBytes(t *testing.T, name string) []byte {
+	t.Helper()
+	path := filepath.Join("testdata", name)
+	bytes, err := ioutil.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return bytes
+}
+
+func TestCleanText(t *testing.T) {
+	about := helperLoadBytes(t, "about")
+	actual := cleanText(about)
+	golden := filepath.Join("testdata", t.Name()+".golden")
+	if *update {
+		if err := ioutil.WriteFile(golden, actual, 0644); err != nil {
+			t.Fatal(err)
+		}
+	}
+	expected, _ := ioutil.ReadFile(golden)
+
+	if !bytes.Equal(actual, expected) {
+		t.Fail()
+	}
+}