From bded863524b701332bbc6e20ae72468301015c36 Mon Sep 17 00:00:00 2001
From: n-peugnet <n.peugnet@free.fr>
Date: Wed, 22 Sep 2021 21:41:48 +0200
Subject: add tests for io utils

---
 utils/io_test.go | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 utils/io_test.go

diff --git a/utils/io_test.go b/utils/io_test.go
new file mode 100644
index 0000000..5f9c8c7
--- /dev/null
+++ b/utils/io_test.go
@@ -0,0 +1,71 @@
+package utils_test
+
+import (
+	"bytes"
+	"io"
+	"testing"
+
+	"github.com/n-peugnet/dna-backup/utils"
+)
+
+func TestNopCloser(t *testing.T) {
+	var buff bytes.Buffer
+	w := utils.NopCloser(&buff)
+	w.Close()
+	n, err := buff.WriteString("test")
+	if err != nil {
+		t.Error(err)
+	}
+	if n != 4 {
+		t.Error("expected: 4, actual:", n)
+	}
+}
+
+type wrapper struct {
+	n string
+	r utils.ReadWrapper
+	w utils.WriteWrapper
+}
+
+var wrappers = []wrapper{
+	{"Zlib", utils.ZlibReader, utils.ZlibWriter},
+	{"Nop", utils.NopReadWrapper, utils.NopWriteWrapper},
+}
+
+func TestWrappers(t *testing.T) {
+	for _, wrapper := range wrappers {
+		var buff bytes.Buffer
+		var err error
+		w := wrapper.w(&buff)
+		n, err := w.Write([]byte("test"))
+		if err != nil {
+			t.Error(wrapper.n, err)
+		}
+		if n != 4 {
+			t.Error(wrapper.n, "expected: 4, actual:", n)
+		}
+		err = w.Close()
+		if err != nil {
+			t.Error(wrapper.n, err)
+		}
+		r, err := wrapper.r(&buff)
+		if err != nil {
+			t.Error(wrapper.n, err)
+		}
+		b := make([]byte, 4)
+		n, err = r.Read(b)
+		if n != 4 {
+			t.Error(wrapper.n, "expected: 4, actual:", n)
+		}
+		if err != nil && err != io.EOF {
+			t.Error(wrapper.n, err)
+		}
+		if !bytes.Equal(b, []byte("test")) {
+			t.Errorf("%s, expected: %q, actual: %q", "test", wrapper.n, b)
+		}
+		n, err = r.Read(b)
+		if err != io.EOF {
+			t.Error(wrapper.n, err)
+		}
+	}
+}
-- 
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