diff --git a/lib/format_test.go b/lib/format_test.go
new file mode 100644
index 0000000..56a6fce
--- /dev/null
+++ b/lib/format_test.go
@@ -0,0 +1,50 @@
+package lib_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/go-github/github"
+	"github.com/masutaka/github-nippou/lib"
+)
+
+func TestFormatAll(t *testing.T) {
+	issue := github.Issue{
+		State:   github.String("closed"),
+		Title:   github.String("イベントを取得できないことがある"),
+		User:    &github.User{Login: github.String("masutaka")},
+		HTMLURL: github.String("https://github.com/masutaka/github-nippou/issues/1"),
+	}
+	pr := github.PullRequest{
+		State:   github.String("closed"),
+		Title:   github.String("Bundle Update on 2015-10-04"),
+		User:    &github.User{Login: github.String("deppbot")},
+		HTMLURL: github.String("https://github.com/masutaka/github-nippou/pull/31"),
+		Merged:  github.Bool(true),
+	}
+	lines := lib.Lines{
+		lib.NewLineByIssue("masutaka/github-nippou", issue),
+		lib.NewLineByPullRequest("masutaka/github-nippou", pr),
+	}
+	settings := lib.Settings{}
+	settings.Init("", "")
+
+	ctx := context.Background()
+	f := lib.NewFormat(ctx, nil, settings, false)
+
+	result, err := f.All(lines)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+
+	expected := `
+### masutaka/github-nippou
+
+* [イベントを取得できないことがある](https://github.com/masutaka/github-nippou/issues/1) by @[masutaka](https://github.com/masutaka) **closed!**
+* [Bundle Update on 2015-10-04](https://github.com/masutaka/github-nippou/pull/31) by @[deppbot](https://github.com/deppbot) **merged!**
+`
+
+	if result != expected {
+		t.Errorf("unexpected result: got %q, want %q", result, expected)
+	}
+}