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lightning_client_test.go
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lightning_client_test.go
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package lndclient
import (
"context"
"errors"
"testing"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/invoicesrpc"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/stretchr/testify/require"
"google.golang.org/grpc"
)
// addInvoiceArg records the args used in a call to mockRPCClient.AddInvoice.
type addInvoiceArg struct {
in *lnrpc.Invoice
opts []grpc.CallOption
}
// mockRPCClient implements lnrpc.LightningClient with dynamic method
// implementations and call spying.
type mockRPCClient struct {
lnrpc.LightningClient
addInvoice func(in *lnrpc.Invoice, opts ...grpc.CallOption) (
*lnrpc.AddInvoiceResponse, error)
addInvoiceArgs []addInvoiceArg
}
func (m *mockRPCClient) AddInvoice(ctx context.Context, in *lnrpc.Invoice,
opts ...grpc.CallOption) (*lnrpc.AddInvoiceResponse, error) {
m.addInvoiceArgs = append(m.addInvoiceArgs, addInvoiceArg{
in: in,
opts: opts,
})
return m.addInvoice(in, opts...)
}
// TestLightningClientAddInvoice ensures that adding an invoice via
// lightningClient is completed as expected.
func TestLightningClientAddInvoice(t *testing.T) {
// Define constants / fixtures.
var validPreimage lntypes.Preimage
copy(validPreimage[:], "valid preimage")
var validRHash lntypes.Hash
copy(validRHash[:], "valid hash")
validAddInvoiceData := &invoicesrpc.AddInvoiceData{
Memo: "fake memo",
Preimage: &validPreimage,
Hash: &validRHash,
Value: lnwire.MilliSatoshi(500000),
DescriptionHash: []byte("fake 32 byte hash"),
Expiry: 123,
CltvExpiry: 456,
}
validInvoice := &lnrpc.Invoice{
Memo: validAddInvoiceData.Memo,
RPreimage: validAddInvoiceData.Preimage[:],
RHash: validAddInvoiceData.Hash[:],
ValueMsat: int64(validAddInvoiceData.Value),
DescriptionHash: validAddInvoiceData.DescriptionHash,
Expiry: validAddInvoiceData.Expiry,
CltvExpiry: validAddInvoiceData.CltvExpiry,
Private: true,
}
validPayReq := "a valid pay req"
validResp := &lnrpc.AddInvoiceResponse{
RHash: validRHash[:],
PaymentRequest: validPayReq,
}
validAddInvoiceArgs := []addInvoiceArg{
{in: validInvoice},
}
validAddInvoice := func(in *lnrpc.Invoice, opts ...grpc.CallOption) (
*lnrpc.AddInvoiceResponse, error) {
return validResp, nil
}
errorAddInvoice := func(in *lnrpc.Invoice, opts ...grpc.CallOption) (
*lnrpc.AddInvoiceResponse, error) {
return nil, errors.New("error")
}
// Set up the test structure.
type expect struct {
addInvoiceArgs []addInvoiceArg
hash lntypes.Hash
payRequest string
wantErr bool
}
type testCase struct {
name string
client mockRPCClient
invoice *invoicesrpc.AddInvoiceData
expect expect
}
// Run through the test cases.
tests := []testCase{
{
name: "happy path",
client: mockRPCClient{
addInvoice: validAddInvoice,
},
invoice: validAddInvoiceData,
expect: expect{
addInvoiceArgs: validAddInvoiceArgs,
hash: validRHash,
payRequest: validPayReq,
},
}, {
name: "rpc client error",
client: mockRPCClient{
addInvoice: errorAddInvoice,
},
invoice: validAddInvoiceData,
expect: expect{
addInvoiceArgs: validAddInvoiceArgs,
wantErr: true,
},
},
}
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
ln := lightningClient{
client: &test.client,
}
hash, payRequest, err := ln.AddInvoice(
context.Background(), test.invoice,
)
// Check if an error (or no error) was received as
// expected.
if test.expect.wantErr {
require.Error(t, err)
} else {
require.NoError(t, err)
}
// Check if the expected hash was returned.
require.Equal(
t, hash, test.expect.hash,
"received unexpected hash",
)
// Check if the expected invoice was returned.
require.Equal(
t, payRequest, test.expect.payRequest,
"received unexpected payment request",
)
// Check if the expected args were passed to the RPC
// client call.
require.Equal(t, test.client.addInvoiceArgs,
test.expect.addInvoiceArgs,
"rpc client call was not made as expected",
)
})
}
}