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

common/eventlog/eventlog_test.go

+// 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)
+        }
+}