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Diffstat (limited to 'src/test/README.md')
| -rw-r--r-- | src/test/README.md | 50 |
1 files changed, 43 insertions, 7 deletions
diff --git a/src/test/README.md b/src/test/README.md index 0876db7a72..bab1a28f61 100644 --- a/src/test/README.md +++ b/src/test/README.md @@ -42,17 +42,18 @@ test_bitcoin --log_level=all --run_test=getarg_tests ``` `log_level` controls the verbosity of the test framework, which logs when a -test case is entered, for example. `test_bitcoin` also accepts the command -line arguments accepted by `bitcoind`. Use `--` to separate both types of -arguments: +test case is entered, for example. + +`test_bitcoin` also accepts some of the command line arguments accepted by +`bitcoind`. Use `--` to separate these sets of arguments: ```bash test_bitcoin --log_level=all --run_test=getarg_tests -- -printtoconsole=1 ``` -The `-printtoconsole=1` after the two dashes redirects the debug log, which -would normally go to a file in the test datadir -(`BasicTestingSetup::m_path_root`), to the standard terminal output. +The `-printtoconsole=1` after the two dashes sends debug logging, which +normally goes only to `debug.log` within the data directory, also to the +standard terminal output. ... or to run just the doubledash test: @@ -60,7 +61,42 @@ would normally go to a file in the test datadir test_bitcoin --run_test=getarg_tests/doubledash ``` -Run `test_bitcoin --help` for the full list. +`test_bitcoin` creates a temporary working (data) directory with a randomly +generated pathname within `test_common_Bitcoin Core/`, which in turn is within +the system's temporary directory (see +[`temp_directory_path`](https://en.cppreference.com/w/cpp/filesystem/temp_directory_path)). +This data directory looks like a simplified form of the standard `bitcoind` data +directory. Its content will vary depending on the test, but it will always +have a `debug.log` file, for example. + +The location of the temporary data directory can be specified with the +`-testdatadir` option. This can make debugging easier. The directory +path used is the argument path appended with +`/test_common_Bitcoin Core/<test-name>/datadir`. +The directory path is created if necessary. +Specifying this argument also causes the data directory +not to be removed after the last test. This is useful for looking at +what the test wrote to `debug.log` after it completes, for example. +(The directory is removed at the start of the next test run, +so no leftover state is used.) + +```bash +$ test_bitcoin --run_test=getarg_tests/doubledash -- -testdatadir=/somewhere/mydatadir +Test directory (will not be deleted): "/somewhere/mydatadir/test_common_Bitcoin Core/getarg_tests/doubledash/datadir +Running 1 test case... + +*** No errors detected +$ ls -l '/somewhere/mydatadir/test_common_Bitcoin Core/getarg_tests/doubledash/datadir' +total 8 +drwxrwxr-x 2 admin admin 4096 Nov 27 22:45 blocks +-rw-rw-r-- 1 admin admin 1003 Nov 27 22:45 debug.log +``` + +If you run an entire test suite, such as `--run_test=getarg_tests`, or all the test suites +(by not specifying `--run_test`), a separate directory +will be created for each individual test. + +Run `test_bitcoin --help` for the full list of tests. ### Adding test cases |