misc: refactor loop tests to use require where possible

client_test.go

@@ -1,7 +1,6 @@
 package loop
 
 import (
-	"bytes"
 	"context"
 	"crypto/sha256"
 	"errors"
@@ -57,9 +56,7 @@ func TestLoopOutSuccess(t *testing.T) {
 
 	// Initiate loop out.
 	info, err := ctx.swapClient.LoopOut(context.Background(), &req)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 
 	ctx.assertStored()
 	ctx.assertStatus(loopdb.StateInitiated)
@@ -84,9 +81,7 @@ func TestLoopOutFailOffchain(t *testing.T) {
 	ctx := createClientTestContext(t, nil)
 
 	_, err := ctx.swapClient.LoopOut(context.Background(), testRequest)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 
 	ctx.assertStored()
 	ctx.assertStatus(loopdb.StateInitiated)
@@ -208,14 +203,10 @@ func testLoopOutResume(t *testing.T, confs uint32, expired, preimageRevealed,
 	amt := btcutil.Amount(50000)
 
 	swapPayReq, err := getInvoice(hash, amt, swapInvoiceDesc)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 
 	prePayReq, err := getInvoice(hash, 100, prepayInvoiceDesc)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 
 	_, senderPubKey := test.CreateKey(1)
 	var senderKey [33]byte
@@ -373,10 +364,11 @@ func testLoopOutSuccess(ctx *testContext, amt btcutil.Amount, hash lntypes.Hash,
 	// Expect client on-chain sweep of HTLC.
 	sweepTx := ctx.ReceiveTx()
 
-	if !bytes.Equal(sweepTx.TxIn[0].PreviousOutPoint.Hash[:],
-		htlcOutpoint.Hash[:]) {
-		ctx.T.Fatalf("client not sweeping from htlc tx")
-	}
+	require.Equal(
+		ctx.T, htlcOutpoint.Hash[:],
+		sweepTx.TxIn[0].PreviousOutPoint.Hash[:],
+		"client not sweeping from htlc tx",
+	)
 
 	var preImageIndex int
 	switch scriptVersion {
@@ -390,9 +382,7 @@ func testLoopOutSuccess(ctx *testContext, amt btcutil.Amount, hash lntypes.Hash,
 	// Check preimage.
 	clientPreImage := sweepTx.TxIn[0].Witness[preImageIndex]
 	clientPreImageHash := sha256.Sum256(clientPreImage)
-	if clientPreImageHash != hash {
-		ctx.T.Fatalf("incorrect preimage")
-	}
+	require.Equal(ctx.T, hash, lntypes.Hash(clientPreImageHash))
 
 	// Since we successfully published our sweep, we expect the preimage to
 	// have been pushed to our mock server.

loopd/swapclient_server_test.go

@@ -130,16 +130,13 @@ func TestValidateConfTarget(t *testing.T) {
 				test.confTarget, defaultConf,
 			)
 
-			haveErr := err != nil
-			if haveErr != test.expectErr {
-				t.Fatalf("expected err: %v, got: %v",
-					test.expectErr, err)
+			if test.expectErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
 			}
 
-			if target != test.expectedTarget {
-				t.Fatalf("expected: %v, got: %v",
-					test.expectedTarget, target)
-			}
+			require.Equal(t, test.expectedTarget, target)
 		})
 	}
 }
@@ -199,16 +196,13 @@ func TestValidateLoopInRequest(t *testing.T) {
 				test.confTarget, external,
 			)
 
-			haveErr := err != nil
-			if haveErr != test.expectErr {
-				t.Fatalf("expected err: %v, got: %v",
-					test.expectErr, err)
+			if test.expectErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
 			}
 
-			if conf != test.expectedTarget {
-				t.Fatalf("expected: %v, got: %v",
-					test.expectedTarget, conf)
-			}
+			require.Equal(t, test.expectedTarget, conf)
 		})
 	}
 }

loopin_test.go

@@ -58,9 +58,8 @@ func testLoopInSuccess(t *testing.T) {
 		context.Background(), cfg,
 		height, req,
 	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
+
 	inSwap := initResult.swap
 
 	ctx.store.assertLoopInStored()
@@ -142,10 +141,7 @@ func testLoopInSuccess(t *testing.T) {
 	ctx.assertState(loopdb.StateSuccess)
 	ctx.store.assertLoopInState(loopdb.StateSuccess)
 
-	err = <-errChan
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, <-errChan)
 }
 
 // TestLoopInTimeout tests scenarios where the server doesn't sweep the htlc
@@ -215,9 +211,7 @@ func testLoopInTimeout(t *testing.T, externalValue int64) {
 		context.Background(), cfg,
 		height, &req,
 	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 	inSwap := initResult.swap
 
 	ctx.store.assertLoopInStored()
@@ -289,11 +283,7 @@ func testLoopInTimeout(t *testing.T, externalValue int64) {
 		ctx.assertState(loopdb.StateFailIncorrectHtlcAmt)
 		ctx.store.assertLoopInState(loopdb.StateFailIncorrectHtlcAmt)
 
-		err = <-errChan
-		if err != nil {
-			t.Fatal(err)
-		}
-
+		require.NoError(t, <-errChan)
 		return
 	}
 
@@ -308,9 +298,11 @@ func testLoopInTimeout(t *testing.T, externalValue int64) {
 
 	// Expect a signing request for the htlc tx output value.
 	signReq := <-ctx.lnd.SignOutputRawChannel
-	if signReq.SignDescriptors[0].Output.Value != htlcTx.TxOut[0].Value {
-		t.Fatal("invalid signing amount")
-	}
+	require.Equal(
+		t, htlcTx.TxOut[0].Value,
+		signReq.SignDescriptors[0].Output.Value,
+		"invalid signing amount",
+	)
 
 	// Expect timeout tx to be published.
 	timeoutTx := <-ctx.lnd.TxPublishChannel
@@ -341,10 +333,7 @@ func testLoopInTimeout(t *testing.T, externalValue int64) {
 	state := ctx.store.assertLoopInState(loopdb.StateFailTimeout)
 	require.Equal(t, cost, state.Cost)
 
-	err = <-errChan
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, <-errChan)
 }
 
 // TestLoopInResume tests resuming swaps in various states.
@@ -483,17 +472,10 @@ func testLoopInResume(t *testing.T, state loopdb.SwapState, expired bool,
 	require.NoError(t, err)
 
 	err = ctx.store.CreateLoopIn(testPreimage.Hash(), contract)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 
-	inSwap, err := resumeLoopInSwap(
-		context.Background(), cfg,
-		pendSwap,
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	inSwap, err := resumeLoopInSwap(context.Background(), cfg, pendSwap)
+	require.NoError(t, err)
 
 	var height int32
 	if expired {
@@ -512,10 +494,7 @@ func testLoopInResume(t *testing.T, state loopdb.SwapState, expired bool,
 	}()
 
 	defer func() {
-		err = <-errChan
-		if err != nil {
-			t.Fatal(err)
-		}
+		require.NoError(t, <-errChan)
 
 		select {
 		case <-ctx.lnd.SendPaymentChannel:

loopin_testcontext_test.go

@@ -63,10 +63,7 @@ func newLoopInTestContext(t *testing.T) *loopInTestContext {
 
 func (c *loopInTestContext) assertState(expectedState loopdb.SwapState) {
 	state := <-c.statusChan
-	if state.State != expectedState {
-		c.t.Fatalf("expected state %v but got %v", expectedState,
-			state.State)
-	}
+	require.Equal(c.t, expectedState, state.State)
 }
 
 // assertSubscribeInvoice asserts that the client subscribes to invoice updates

loopout_test.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"math"
-	"reflect"
 	"testing"
 	"time"
 
@@ -66,7 +65,7 @@ func testLoopOutPaymentParameters(t *testing.T) {
 	blockEpochChan := make(chan interface{})
 	statusChan := make(chan SwapInfo)
 
-	const maxParts = 5
+	const maxParts = uint32(5)
 
 	chanSet := loopdb.ChannelSet{2, 3}
 
@@ -77,9 +76,7 @@ func testLoopOutPaymentParameters(t *testing.T) {
 	initResult, err := newLoopOutSwap(
 		context.Background(), cfg, height, &req,
 	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 	swap := initResult.swap
 
 	// Execute the swap in its own goroutine.
@@ -105,9 +102,7 @@ func testLoopOutPaymentParameters(t *testing.T) {
 	store.assertLoopOutStored()
 
 	state := <-statusChan
-	if state.State != loopdb.StateInitiated {
-		t.Fatal("unexpected state")
-	}
+	require.Equal(t, loopdb.StateInitiated, state.State)
 
 	// Check that the SwapInfo contains the outgoing chan set
 	require.Equal(t, chanSet, state.OutgoingChanSet)
@@ -130,18 +125,12 @@ func testLoopOutPaymentParameters(t *testing.T) {
 	}
 
 	// Assert that it is sent as a multi-part payment.
-	if swapPayment.MaxParts != maxParts {
-		t.Fatalf("Expected %v parts, but got %v",
-			maxParts, swapPayment.MaxParts)
-	}
+	require.Equal(t, maxParts, swapPayment.MaxParts)
 
 	// Verify the outgoing channel set restriction.
-	if !reflect.DeepEqual(
-		[]uint64(req.OutgoingChanSet), swapPayment.OutgoingChanIds,
-	) {
-
-		t.Fatalf("Unexpected outgoing channel set")
-	}
+	require.Equal(
+		t, []uint64(req.OutgoingChanSet), swapPayment.OutgoingChanIds,
+	)
 
 	// Swap is expected to register for confirmation of the htlc. Assert
 	// this to prevent a blocked channel in the mock.
@@ -152,10 +141,7 @@ func testLoopOutPaymentParameters(t *testing.T) {
 	cancel()
 
 	// Expect the swap to signal that it was cancelled.
-	err = <-errChan
-	if err != context.Canceled {
-		t.Fatal(err)
-	}
+	require.Equal(t, context.Canceled, <-errChan)
 }
 
 // TestLateHtlcPublish tests that the client is not revealing the preimage if
@@ -198,9 +184,7 @@ func testLateHtlcPublish(t *testing.T) {
 	initResult, err := newLoopOutSwap(
 		context.Background(), cfg, height, testRequest,
 	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 	swap := initResult.swap
 
 	sweeper := &sweep.Sweeper{Lnd: &lnd.LndServices}
@@ -225,11 +209,8 @@ func testLateHtlcPublish(t *testing.T) {
 	}()
 
 	store.assertLoopOutStored()
-
-	state := <-statusChan
-	if state.State != loopdb.StateInitiated {
-		t.Fatal("unexpected state")
-	}
+	status := <-statusChan
+	require.Equal(t, loopdb.StateInitiated, status.State)
 
 	signalSwapPaymentResult := ctx.AssertPaid(swapInvoiceDesc)
 	signalPrepaymentResult := ctx.AssertPaid(prepayInvoiceDesc)
@@ -249,15 +230,9 @@ func testLateHtlcPublish(t *testing.T) {
 
 	store.assertStoreFinished(loopdb.StateFailTimeout)
 
-	status := <-statusChan
-	if status.State != loopdb.StateFailTimeout {
-		t.Fatal("unexpected state")
-	}
-
-	err = <-errChan
-	if err != nil {
-		t.Fatal(err)
-	}
+	status = <-statusChan
+	require.Equal(t, loopdb.StateFailTimeout, status.State)
+	require.NoError(t, <-errChan)
 }
 
 // TestCustomSweepConfTarget ensures we are able to sweep a Loop Out HTLC with a
@@ -304,9 +279,7 @@ func testCustomSweepConfTarget(t *testing.T) {
 	initResult, err := newLoopOutSwap(
 		context.Background(), cfg, ctx.Lnd.Height, &testReq,
 	)
-	if err != nil {
-		t.Fatal(err)
-	}
+	require.NoError(t, err)
 	swap := initResult.swap
 
 	// Set up the required dependencies to execute the swap.
@@ -339,9 +312,7 @@ func testCustomSweepConfTarget(t *testing.T) {
 	// The swap should be found in its initial state.
 	cfg.store.(*storeMock).assertLoopOutStored()
 	state := <-statusChan
-	if state.State != loopdb.StateInitiated {
-		t.Fatal("unexpected state")
-	}
+	require.Equal(t, loopdb.StateInitiated, state.State)
 
 	// We'll then pay both the swap and prepay invoice, which should trigger
 	// the server to publish the on-chain HTLC.
@@ -381,10 +352,7 @@ func testCustomSweepConfTarget(t *testing.T) {
 
 	cfg.store.(*storeMock).assertLoopOutState(loopdb.StatePreimageRevealed)
 	status := <-statusChan
-	if status.State != loopdb.StatePreimageRevealed {
-		t.Fatalf("expected state %v, got %v",
-			loopdb.StatePreimageRevealed, status.State)
-	}
+	require.Equal(t, loopdb.StatePreimageRevealed, status.State)
 
 	// When using taproot htlcs the flow is different as we do reveal the
 	// preimage before sweeping in order for the server to trust us with
@@ -410,10 +378,10 @@ func testCustomSweepConfTarget(t *testing.T) {
 		t.Helper()
 
 		sweepTx := ctx.ReceiveTx()
-		if sweepTx.TxIn[0].PreviousOutPoint.Hash != htlcTx.TxHash() {
-			t.Fatalf("expected sweep tx to spend %v, got %v",
-				htlcTx.TxHash(), sweepTx.TxIn[0].PreviousOutPoint)
-		}
+		require.Equal(
+			t, htlcTx.TxHash(),
+			sweepTx.TxIn[0].PreviousOutPoint.Hash,
+		)
 
 		// The fee used for the sweep transaction is an estimate based
 		// on the maximum witness size, so we should expect to see a
@@ -427,16 +395,14 @@ func testCustomSweepConfTarget(t *testing.T) {
 		feeRate, err := ctx.Lnd.WalletKit.EstimateFeeRate(
 			context.Background(), expConfTarget,
 		)
-		if err != nil {
-			t.Fatalf("unable to retrieve fee estimate: %v", err)
-		}
+		require.NoError(t, err, "unable to retrieve fee estimate")
+
 		minFee := feeRate.FeeForWeight(weight)
-		maxFee := btcutil.Amount(float64(minFee) * 1.1)
+		// Just an estimate that works to sanity check fee upper bound.
+		maxFee := btcutil.Amount(float64(minFee) * 1.5)
 
-		if fee < minFee && fee > maxFee {
-			t.Fatalf("expected sweep tx to have fee between %v-%v, "+
-				"got %v", minFee, maxFee, fee)
-		}
+		require.GreaterOrEqual(t, fee, minFee)
+		require.LessOrEqual(t, fee, maxFee)
 
 		return sweepTx
 	}
@@ -479,14 +445,8 @@ func testCustomSweepConfTarget(t *testing.T) {
 
 	cfg.store.(*storeMock).assertLoopOutState(loopdb.StateSuccess)
 	status = <-statusChan
-	if status.State != loopdb.StateSuccess {
-		t.Fatalf("expected state %v, got %v", loopdb.StateSuccess,
-			status.State)
-	}
-
-	if err := <-errChan; err != nil {
-		t.Fatal(err)
-	}
+	require.Equal(t, loopdb.StateSuccess, status.State)
+	require.NoError(t, <-errChan)
 }
 
 // TestPreimagePush tests or logic that decides whether to push our preimage to

store_mock_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/lightninglabs/loop/loopdb"
 	"github.com/lightninglabs/loop/test"
 	"github.com/lightningnetwork/lnd/lntypes"
+	"github.com/stretchr/testify/require"
 )
 
 // storeMock implements a mock client swap store.
@@ -239,9 +240,7 @@ func (s *storeMock) assertLoopInState(
 	s.t.Helper()
 
 	state := <-s.loopInUpdateChan
-	if state.State != expectedState {
-		s.t.Fatalf("expected state %v, got %v", expectedState, state)
-	}
+	require.Equal(s.t, expectedState, state.State)
 
 	return state
 }
@@ -252,9 +251,8 @@ func (s *storeMock) assertStorePreimageReveal() {
 
 	select {
 	case state := <-s.loopOutUpdateChan:
-		if state.State != loopdb.StatePreimageRevealed {
-			s.t.Fatalf("unexpected state")
-		}
+		require.Equal(s.t, loopdb.StatePreimageRevealed, state.State)
+
 	case <-time.After(test.Timeout):
 		s.t.Fatalf("expected swap to be marked as preimage revealed")
 	}
@@ -265,10 +263,8 @@ func (s *storeMock) assertStoreFinished(expectedResult loopdb.SwapState) {
 
 	select {
 	case state := <-s.loopOutUpdateChan:
-		if state.State != expectedResult {
-			s.t.Fatalf("expected result %v, but got %v",
-				expectedResult, state)
-		}
+		require.Equal(s.t, expectedResult, state.State)
+
 	case <-time.After(test.Timeout):
 		s.t.Fatalf("expected swap to be finished")
 	}

swap/htlc_test.go

@@ -54,9 +54,7 @@ func assertEngineExecution(t *testing.T, valid bool,
 	done := false
 	for !done {
 		dis, err := vm.DisasmPC()
-		if err != nil {
-			t.Fatalf("stepping (%v)\n", err)
-		}
+		require.NoError(t, err, "stepping")
 		debugBuf.WriteString(fmt.Sprintf("stepping %v\n", dis))
 
 		done, err = vm.Step()

test/context.go

@@ -86,9 +86,11 @@ func (ctx *Context) AssertRegisterSpendNtfn(script []byte) {
 
 	select {
 	case spendIntent := <-ctx.Lnd.RegisterSpendChannel:
-		if !bytes.Equal(spendIntent.PkScript, script) {
-			ctx.T.Fatalf("server not listening for published htlc script")
-		}
+		require.Equal(
+			ctx.T, script, spendIntent.PkScript,
+			"server not listening for published htlc script",
+		)
+
 	case <-time.After(Timeout):
 		DumpGoroutines()
 		ctx.T.Fatalf("spend not subscribed to")
@@ -163,10 +165,11 @@ func (ctx *Context) AssertPaid(
 
 		payReq := ctx.DecodeInvoice(swapPayment.Invoice)
 
-		if _, ok := ctx.PaidInvoices[*payReq.Description]; ok {
-			ctx.T.Fatalf("duplicate invoice paid: %v",
-				*payReq.Description)
-		}
+		_, ok := ctx.PaidInvoices[*payReq.Description]
+		require.False(
+			ctx.T, ok,
+			"duplicate invoice paid: %v", *payReq.Description,
+		)
 
 		done := func(result error) {
 			if result != nil {
@@ -195,9 +198,10 @@ func (ctx *Context) AssertSettled(
 	select {
 	case preimage := <-ctx.Lnd.SettleInvoiceChannel:
 		hash := sha256.Sum256(preimage[:])
-		if expectedHash != hash {
-			ctx.T.Fatalf("server claims with wrong preimage")
-		}
+		require.Equal(
+			ctx.T, expectedHash, lntypes.Hash(hash),
+			"server claims with wrong preimage",
+		)
 
 		return preimage
 	case <-time.After(Timeout):
@@ -232,9 +236,8 @@ func (ctx *Context) DecodeInvoice(request string) *zpay32.Invoice {
 	ctx.T.Helper()
 
 	payReq, err := ctx.Lnd.DecodeInvoice(request)
-	if err != nil {
-		ctx.T.Fatal(err)
-	}
+	require.NoError(ctx.T, err)
+
 	return payReq
 }
 
@@ -256,7 +259,5 @@ func (ctx *Context) GetOutputIndex(tx *wire.MsgTx,
 // waits for the notification to be processed by selecting on a
 // dedicated test channel.
 func (ctx *Context) NotifyServerHeight(height int32) {
-	if err := ctx.Lnd.NotifyHeight(height); err != nil {
-		ctx.T.Fatal(err)
-	}
+	require.NoError(ctx.T, ctx.Lnd.NotifyHeight(height))
 }

test/testutils.go

@@ -14,6 +14,7 @@ import (
 	"github.com/lightningnetwork/lnd/lntypes"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/zpay32"
+	"github.com/stretchr/testify/require"
 )
 
 var (
@@ -29,11 +30,10 @@ var (
 
 // GetDestAddr deterministically generates a sweep address for testing.
 func GetDestAddr(t *testing.T, nr byte) btcutil.Address {
-	destAddr, err := btcutil.NewAddressScriptHash([]byte{nr},
-		&chaincfg.MainNetParams)
-	if err != nil {
-		t.Fatal(err)
-	}
+	destAddr, err := btcutil.NewAddressScriptHash(
+		[]byte{nr}, &chaincfg.MainNetParams,
+	)
+	require.NoError(t, err)
 
 	return destAddr
 }

testcontext_test.go

@@ -140,9 +140,8 @@ func (ctx *testContext) finish() {
 	ctx.stop()
 	select {
 	case err := <-ctx.runErr:
-		if err != nil {
-			ctx.T.Fatal(err)
-		}
+		require.NoError(ctx.T, err)
+
 	case <-time.After(test.Timeout):
 		ctx.T.Fatal("client not stopping")
 	}
@@ -156,19 +155,12 @@ func (ctx *testContext) finish() {
 func (ctx *testContext) notifyHeight(height int32) {
 	ctx.T.Helper()
 
-	if err := ctx.Lnd.NotifyHeight(height); err != nil {
-		ctx.T.Fatal(err)
-	}
+	require.NoError(ctx.T, ctx.Lnd.NotifyHeight(height))
 }
 
 func (ctx *testContext) assertIsDone() {
-	if err := ctx.Lnd.IsDone(); err != nil {
-		ctx.T.Fatal(err)
-	}
-
-	if err := ctx.store.isDone(); err != nil {
-		ctx.T.Fatal(err)
-	}
+	require.NoError(ctx.T, ctx.Lnd.IsDone())
+	require.NoError(ctx.T, ctx.store.isDone())
 
 	select {
 	case <-ctx.statusChan: