liquidity: add clock for mocking time in tests

go.mod

@@ -14,6 +14,7 @@ require (
 	github.com/lightninglabs/protobuf-hex-display v1.3.3-0.20191212020323-b444784ce75d
 	github.com/lightningnetwork/lnd v0.11.1-beta.rc3
 	github.com/lightningnetwork/lnd/cert v1.0.3
+	github.com/lightningnetwork/lnd/clock v1.0.1
 	github.com/lightningnetwork/lnd/queue v1.0.4
 	github.com/stretchr/testify v1.5.1
 	github.com/urfave/cli v1.20.0

liquidity/liquidity.go

@@ -13,6 +13,7 @@ import (
 	"github.com/lightninglabs/lndclient"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/loopdb"
+	"github.com/lightningnetwork/lnd/clock"
 	"github.com/lightningnetwork/lnd/lnwire"
 )
 
@@ -57,6 +58,9 @@ type Config struct {
 
 	// Lnd provides us with access to lnd's rpc servers.
 	Lnd *lndclient.LndServices
+
+	// Clock allows easy mocking of time in unit tests.
+	Clock clock.Clock
 }
 
 // Parameters is a set of parameters provided by the user which guide

liquidity/liquidity_test.go

@@ -3,16 +3,20 @@ package liquidity
 import (
 	"context"
 	"testing"
+	"time"
 
 	"github.com/lightninglabs/lndclient"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/loopdb"
 	"github.com/lightninglabs/loop/test"
+	"github.com/lightningnetwork/lnd/clock"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/stretchr/testify/require"
 )
 
 var (
+	testTime = time.Date(2020, 02, 13, 0, 0, 0, 0, time.UTC)
+
 	chanID1 = lnwire.NewShortChanIDFromInt(1)
 	chanID2 = lnwire.NewShortChanIDFromInt(2)
 
@@ -55,7 +59,8 @@ func newTestConfig() (*Config, *test.LndMockServices) {
 
 			return NewRestrictions(1, 10000), nil
 		},
-		Lnd: &lnd.LndServices,
+		Lnd:   &lnd.LndServices,
+		Clock: clock.NewTestClock(testTime),
 	}, lnd
 }
 

loopd/utils.go

@@ -7,6 +7,7 @@ import (
 	"github.com/lightninglabs/lndclient"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/liquidity"
+	"github.com/lightningnetwork/lnd/clock"
 )
 
 // getClient returns an instance of the swap client.
@@ -46,7 +47,8 @@ func getLiquidityManager(client *loop.Client) *liquidity.Manager {
 				outTerms.MinSwapAmount, outTerms.MaxSwapAmount,
 			), nil
 		},
-		Lnd: client.LndServices,
+		Lnd:   client.LndServices,
+		Clock: clock.NewDefaultClock(),
 	}
 
 	return liquidity.NewManager(mngrCfg)