diff --git a/TODO b/TODO
index 79aa09e..e845e66 100755
--- a/TODO
+++ b/TODO
@@ -14,7 +14,7 @@ FTS
 
 main test -
    -  create,
-      -  header
+      x  header
       -  text box
       -  submit
       -  submit target
diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..83f6b72
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,171 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"local/notes-server/config"
+	"local/notes-server/server"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+func TestAll(t *testing.T) {
+	makeFiles(t)
+	defer os.RemoveAll(config.Root)
+	s := makeServer(t)
+	defer s.Close()
+	testServer(t, s.URL)
+}
+
+func makeFiles(t *testing.T) {
+	d, err := ioutil.TempDir(os.TempDir(), "pattern*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	config.Root = d
+	for _, dir := range []string{"dirA", "dirB"} {
+		if err := os.MkdirAll(path.Join(d, dir), os.ModePerm); err != nil {
+			t.Fatal(err)
+		}
+		for _, file := range []string{"fileA", "fileB"} {
+			content := fmt.Sprintf("hello from %s/%s/%s", d, dir, file)
+			err := ioutil.WriteFile(
+				path.Join(d, dir, file),
+				[]byte(content),
+				os.ModePerm,
+			)
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+}
+
+func makeServer(t *testing.T) *httptest.Server {
+	s := server.New()
+	if err := s.Routes(); err != nil {
+		t.Fatal(err)
+	}
+	return httptest.NewServer(s)
+}
+
+func testServer(t *testing.T, url string) {
+	testCreate(t, url)
+	testEdit(t, url)
+	testDir(t, url)
+	testFile(t, url)
+	testNavRootDir(t, url)
+	testNavRootFile(t, url)
+	testNavDirDir(t, url)
+	testNavDirFile(t, url)
+}
+
+func testCreate(t *testing.T, url string) {
+	for _, path := range []string{"dirX/fileX", "fileX"} {
+		resp, err := http.Get(url + "/create/" + path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			t.Fatal(resp.StatusCode)
+		}
+		b, _ := ioutil.ReadAll(resp.Body)
+		s := string(b)
+		log.Println(string(s))
+		if ok := assertHasMultilink(s, path); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasForm(s, "/submit/"+path); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasTextArea(s); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasSubmit(s); !ok {
+			t.Error(err)
+		}
+	}
+}
+
+func testEdit(t *testing.T, url string) {
+	for _, path := range []string{"dirX/fileX", "fileX"} {
+		resp, err := http.Get(url + "/edit/" + path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			t.Fatal(resp.StatusCode)
+		}
+		b, _ := ioutil.ReadAll(resp.Body)
+		s := string(b)
+		if ok := assertHasMultilink(s, path); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasForm(s); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasTextArea(s); !ok {
+			t.Error(err)
+		}
+		if ok := assertHasSubmit(s); !ok {
+			t.Error(err)
+		}
+	}
+}
+
+func testDir(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func testFile(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func testNavRootDir(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func testNavRootFile(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func testNavDirDir(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func testNavDirFile(t *testing.T, url string) {
+	t.Error("not impl")
+}
+
+func assertHasMultilink(body string, segments ...string) bool {
+	if !strings.Contains(body, `/<a href="/notes">notes</a>/`) {
+		return false
+	}
+	for _, segment := range segments {
+		regexp := regexp.MustCompile(`<a href="[^"]*` + segment + `">`)
+		if !regexp.MatchString(body) {
+			return false
+		}
+	}
+	return true
+}
+
+func assertHasForm(body string, action ...string) bool {
+	return strings.Contains(body, `<form`) && (len(action) == 0 || strings.Contains(body, `action="`))
+}
+
+func assertHasTextArea(body string) bool {
+	return strings.Contains(body, `<textarea`)
+}
+
+func assertHasSubmit(body string) bool {
+	return strings.Contains(body, `<button`) && strings.Contains(body, `type="submit"`)
+}
diff --git a/notes/notes_test.go b/notes/notes_test.go
new file mode 100644
index 0000000..6e8cef9
--- /dev/null
+++ b/notes/notes_test.go
@@ -0,0 +1 @@
+package notes
diff --git a/notes/search.go b/notes/search.go
new file mode 100644
index 0000000..7e8e4ef
--- /dev/null
+++ b/notes/search.go
@@ -0,0 +1,45 @@
+package notes
+
+import (
+	"bufio"
+	"bytes"
+	"local/notes-server/filetree"
+	"os"
+	"path/filepath"
+)
+
+func (n *Notes) Search(phrase string) (string, error) {
+	files := filetree.NewFiles()
+	err := filepath.Walk(n.root,
+		func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			if info.IsDir() {
+				return nil
+			}
+			ok, err := grepFile(path, []byte(phrase))
+			if ok {
+				p := filetree.NewPathFromLocal(path)
+				files.Push(p, info)
+			}
+			return err
+		},
+	)
+	return filetree.Paths(*files).List(), err
+}
+
+func grepFile(file string, pat []byte) (bool, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return false, err
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		if bytes.Contains(scanner.Bytes(), pat) {
+			return true, scanner.Err()
+		}
+	}
+	return false, scanner.Err()
+}
diff --git a/notes/search_test.go b/notes/search_test.go
new file mode 100644
index 0000000..6dfcb98
--- /dev/null
+++ b/notes/search_test.go
@@ -0,0 +1,44 @@
+package notes
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestSearch(t *testing.T) {
+	d, err := ioutil.TempDir(os.TempDir(), "pattern*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(d)
+	for i := 0; i < 5; i++ {
+		f, err := ioutil.TempFile(d, fmt.Sprintf("file_%d", i))
+		if err != nil {
+			t.Fatal(err)
+		}
+		fmt.Fprintf(f, "this file is number %d", i)
+		f.Close()
+	}
+
+	n := New()
+	n.root = d
+
+	result, err := n.Search("this file")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if v := len(strings.Split(result, "\n")); v < 7 {
+		t.Fatal(v, result)
+	}
+
+	result, err = n.Search("4")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if v := len(strings.Split(result, "\n")); v > 4 {
+		t.Fatal(v, result)
+	}
+}