From a43ec8bba5e654d4279bdb05561a11b797d6c5a3 Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 30 Apr 2019 13:12:11 +0200
Subject: [PATCH] internal/testlog: add logger for unit tests
---
internal/testlog/testlog.go | 46 +++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 internal/testlog/testlog.go
diff --git a/internal/testlog/testlog.go b/internal/testlog/testlog.go
new file mode 100644
index 000000000..ffe0546fe
--- /dev/null
+++ b/internal/testlog/testlog.go
@@ -0,0 +1,46 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package testlog provides a log handler for unit tests.
+package testlog
+
+import (
+ "testing"
+
+ "github.com/ethereum/go-ethereum/log"
+)
+
+// Logger returns a logger which logs to the unit test log of t.
+func Logger(t *testing.T, level log.Lvl) log.Logger {
+ l := log.New()
+ l.SetHandler(Handler(t, level))
+ return l
+}
+
+// Handler returns a log handler which logs to the unit test log of t.
+func Handler(t *testing.T, level log.Lvl) log.Handler {
+ return log.LvlFilterHandler(level, &handler{t, log.TerminalFormat(false)})
+}
+
+type handler struct {
+ t *testing.T
+ fmt log.Format
+}
+
+func (h *handler) Log(r *log.Record) error {
+ h.t.Logf("%s", h.fmt.Format(r))
+ return nil
+}
--
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