itest is a package that houses the integration tests made for lnd. This package builds test cases using the test framework lntest.

To add a new test case, create a TestFunc and add it in list_on_test.go. Ideally, the Name should just be the snake case of the name used in TestFunc without the leading test and underscores. For instance, to test lnd's exporting channel backup, we have,

{
		Name:     "export channel backup",
		TestFunc: testExportChannelBackup,
}

The place to put the code of the TestFunc is case-specific. itest package has loosely defined a list of files to test different functionalities of lnd. The new test needs to be put into one of these files, otherwise, a new file needs to be created.

To run a single test case, use make itest icase=$case, where case is the name defined in list_on_test.go, with spaces replaced with underscores(_).

# Run `testListChannels`.
make itest icase=list_channels

There are two ways to run multiple test cases. One way is to use make itest icase=$cases, where cases has the format cases='(case|case|...)'. The case is the name defined in list_on_test.go, with spaces replaced with underscores(_).

# Run `testListChannels` and `testListAddresses` together.
make itest icase='(list_channels|list_addresses)'

Another way to run multiple cases is similar to how Go runs its tests - by simple regex matching. For instance, the following command will run three cases since they all start with the word list,

# Run `testListChannels`, `testListAddresses`, and `testListPayments` together.
make itest icase=list

To run all tests, use make itest without icase flag.

# Run all test cases.
make itest

To run tests in parallel, use make itest-parallel. This command takes two special arguments,

• tranches, specifies the number of parts the test cases will be split into.
• parallel, specifies the number of threads to run in parallel. This value must be smaller than or equal to tranches.

# Split the tests into 4 parts, and run them using 2 threads.
make itest-parallel tranches=4 parallel=2

By default, itest-parallel splits the tests into 4 parts and uses 4 threads to run each of them.

For both make itest and make itest-parallel, the following arguments are allowed,

• timeout, specifies the timeout value used in testing.
• dbbackend, specifies the database backend. Must be bbolt, etcd, or postgres, default to bbolt.
• backend, specifies the chain backend to be used. Must be one of,
  • btcd, the default value.
  • neutrino
  • bitcoind
  • bitcoind notxindex
  • bitcoind rpcpolling

# Run a single test case using bitcoind as the chain backend and etcd as the
# database backend, with a timeout of 5 minutes.
make itest icase=list_channels backend=bitcoind dbbackend=etcd timeout=5m

# Run all test cases in parallel, using bitcoind notxindex as the chain backend
# and etcd as the database backend, with a timeout of 60 minutes for each
# parallel.
make itest-parallel backend="bitcoind notxindex" dbbackend=etcd timeout=60m