luci-go: Basic support for event logging in Go.

common/eventlog/eventlog_test.go

Index: common/eventlog/eventlog_test.go
diff --git a/common/eventlog/eventlog_test.go b/common/eventlog/eventlog_test.go
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index 0000000000000000000000000000000000000000..a28a210cb78ef3e5f4778dd61166a3b8ee3e72f5
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+++ b/common/eventlog/eventlog_test.go
@@ -0,0 +1,41 @@
+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package eventlog
+
+import (
+	"context"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	logpb "github.com/luci/luci-go/common/eventlog/proto"
+)
+
+func TestGeneratesLogEvent(t *testing.T) {
+	c := Client{EventSource: &logpb.InfraEventSource{}}
+
+	var tNano int64 = 1e9
+	begin := logpb.ChromeInfraEvent_BEGIN
+	et := TypedTime{
+		time.Unix(0, tNano),
+		begin,
+	}
+	want := &ChromeInfraLogEvent{
+		LogEvent: &logpb.LogRequestLite_LogEventLite{
+			EventTimeMs: proto.Int64(tNano / 1e6),
+		},
+		InfraEvent: &logpb.ChromeInfraEvent{
+			TimestampKind: &begin,
+			EventSource:   c.EventSource,
+		},
+	}
+
+	got := c.NewLogEvent(context.Background(), et)
+
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("generated log event: got: %v; want: %v", got, want)
+	}
+}