looprpc: add test for ListSwaps pagination and filtering

Author: kornpow

loopd/swapclient_server_test.go

@@ -4,15 +4,19 @@ import (
 	"context"
 	"os"
 	"testing"
+	"time"
 
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btclog/v2"
 	"github.com/lightninglabs/lndclient"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/labels"
+	"github.com/lightninglabs/loop/loopdb"
 	"github.com/lightninglabs/loop/looprpc"
+	"github.com/lightninglabs/loop/swap"
 	mock_lnd "github.com/lightninglabs/loop/test"
+	"github.com/lightningnetwork/lnd/lntypes"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/routing/route"
 	"github.com/stretchr/testify/require"
@@ -595,3 +599,170 @@ func TestHasBandwidth(t *testing.T) {
 		})
 	}
 }
+
+func TestListSwapsFilterAndPagination(t *testing.T) {
+	swapIn1 := loop.SwapInfo{
+		SwapStateData: loopdb.SwapStateData{
+			State: loopdb.StateInitiated,
+			Cost:  loopdb.SwapCost{},
+		},
+		LastUpdate:       time.Now(),
+		SwapHash:         lntypes.Hash{1},
+		SwapType:         swap.Type(swap.TypeIn),
+		HtlcAddressP2WSH: testnetAddr,
+		HtlcAddressP2TR:  testnetAddr,
+	}
+
+	swapOut1 := loop.SwapInfo{
+		SwapStateData: loopdb.SwapStateData{
+			State: loopdb.StateInitiated,
+			Cost:  loopdb.SwapCost{},
+		},
+		LastUpdate:       time.Now(),
+		SwapHash:         lntypes.Hash{2},
+		SwapType:         swap.Type(swap.TypeOut),
+		HtlcAddressP2WSH: testnetAddr,
+		HtlcAddressP2TR:  testnetAddr,
+	}
+
+	swapOut2 := loop.SwapInfo{
+		SwapStateData: loopdb.SwapStateData{
+			State: loopdb.StateInitiated,
+			Cost:  loopdb.SwapCost{},
+		},
+		LastUpdate:       time.Now(),
+		SwapHash:         lntypes.Hash{3},
+		SwapType:         swap.Type(swap.TypeOut),
+		HtlcAddressP2WSH: testnetAddr,
+		HtlcAddressP2TR:  testnetAddr,
+	}
+	// Create test cases with different filter/pagination parameters
+	tests := []struct {
+		name string
+		// Define the mock swaps that will be stored in the mock client
+		mockSwaps []loop.SwapInfo
+		// Request parameters
+		req *looprpc.ListSwapsRequest
+		// Expected response fields
+		expectedReturnedSwapCount  int
+		expectedFirstIdx           uint32
+		expectedLastIdx            uint32
+		expectedFilteredTotalCount uint32
+	}{
+		{
+			name:                       "fetch all swaps no pagination",
+			mockSwaps:                  []loop.SwapInfo{swapIn1},
+			req:                        &looprpc.ListSwapsRequest{},
+			expectedReturnedSwapCount:  1,
+			expectedFirstIdx:           0,
+			expectedLastIdx:            1,
+			expectedFilteredTotalCount: 1,
+		},
+		{
+			name:      "fetch swaps-ins no pagination",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+				ListSwapFilter: &looprpc.ListSwapsFilter{
+					SwapType: looprpc.ListSwapsFilter_LOOP_IN},
+			},
+			expectedReturnedSwapCount:  1,
+			expectedFirstIdx:           0,
+			expectedLastIdx:            1,
+			expectedFilteredTotalCount: 1,
+		},
+		{
+			name:                       "fetch swaps-outs no pagination",
+			mockSwaps:                  []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req:                        &looprpc.ListSwapsRequest{ListSwapFilter: &looprpc.ListSwapsFilter{SwapType: looprpc.ListSwapsFilter_LOOP_OUT}},
+			expectedReturnedSwapCount:  2,
+			expectedFirstIdx:           0,
+			expectedLastIdx:            2,
+			expectedFilteredTotalCount: 2,
+		},
+		{
+			name:      "fetch swaps-outs increment start_index",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+				ListSwapFilter: &looprpc.ListSwapsFilter{
+					SwapType: looprpc.ListSwapsFilter_LOOP_OUT},
+				IndexOffset: 1,
+			},
+			expectedReturnedSwapCount:  1,
+			expectedFirstIdx:           1,
+			expectedLastIdx:            2,
+			expectedFilteredTotalCount: 2,
+		},
+		{
+			name:      "fetch all swaps set swap limit",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+				MaxSwaps: 2,
+			},
+			expectedReturnedSwapCount:  2,
+			expectedFirstIdx:           0,
+			expectedLastIdx:            2,
+			expectedFilteredTotalCount: 3,
+		},
+		{
+			name:      "fetch all swaps set swap limit set start index",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+
+				IndexOffset: 1,
+				MaxSwaps:    1,
+			},
+			expectedReturnedSwapCount:  1,
+			expectedFirstIdx:           1,
+			expectedLastIdx:            2,
+			expectedFilteredTotalCount: 3,
+		},
+		{
+			name:      "fetch all swaps set start index out of bounds",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+				IndexOffset: 5,
+			},
+			expectedReturnedSwapCount:  0,
+			expectedFirstIdx:           5,
+			expectedLastIdx:            3,
+			expectedFilteredTotalCount: 3,
+		},
+		{
+			name:      "fetch all swaps set limit to 0",
+			mockSwaps: []loop.SwapInfo{swapIn1, swapOut1, swapOut2},
+			req: &looprpc.ListSwapsRequest{
+				MaxSwaps: 0,
+			},
+			expectedReturnedSwapCount:  3,
+			expectedFirstIdx:           0,
+			expectedLastIdx:            3,
+			expectedFilteredTotalCount: 3,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+
+			// Create the swap client server with our mock client
+			server := &swapClientServer{
+				swaps: make(map[lntypes.Hash]loop.SwapInfo),
+			}
+
+			// Populate the server's swap cache with our mock swaps
+			for _, swap := range test.mockSwaps {
+				server.swaps[swap.SwapHash] = swap
+			}
+
+			// Call the ListSwaps method
+			resp, err := server.ListSwaps(context.Background(), test.req)
+			require.NoError(t, err)
+
+			// Verify the response matches our expectations
+			require.Equal(t, test.expectedReturnedSwapCount, len(resp.Swaps))
+			require.Equal(t, test.expectedFirstIdx, resp.FirstIndexOffset)
+			require.Equal(t, test.expectedLastIdx, resp.LastIndexOffset)
+			require.Equal(t, test.expectedFilteredTotalCount, resp.TotalFilteredSwaps)
+		})
+	}
+}