feat(tests): Move the RPC tests framework from zcashd

.gitignore

@@ -158,3 +158,9 @@ $RECYCLE.BIN/
 
 # Windows shortcuts
 *.lnk
+
+# Python pycache
+__pycache__/
+
+# RPC tests cache 
+zebra-rpc/qa/cache/

zebra-rpc/qa/README.md

@@ -0,0 +1,88 @@
+The [pull-tester](/pull-tester/) folder contains a script to call
+multiple tests from the [rpc-tests](/rpc-tests/) folder.
+
+Every pull request to the zebra repository is built and run through
+the regression test suite. You can also run all or only individual
+tests locally.
+
+Test dependencies
+=================
+
+Before running the tests, the following must be installed.
+
+Unix
+----
+
+The `zmq`, `toml` and `base58` Python libraries are required. On Ubuntu or Debian-based
+distributions they can be installed via:
+```
+sudo apt-get install python3-zmq python3-base58
+```
+
+OS X
+------
+
+```
+pip3 install pyzmq base58 toml
+```
+
+Running tests locally
+=====================
+
+Make sure `zebrad` binary exists in the `../target/debug/` folder or set the binary path with:
+```
+export CARGO_BIN_EXE_zebrad=/path/to/zebrad
+```
+
+You can run any single test by calling
+
+    ./qa/pull-tester/rpc-tests.py <testname1>
+
+Run the regression test suite with
+
+    ./qa/pull-tester/rpc-tests.py
+
+By default, tests will be run in parallel. To specify how many jobs to run,
+append `--jobs=n` (default n=4).
+
+If you want to create a basic coverage report for the RPC test suite, append `--coverage`.
+
+Possible options, which apply to each individual test run:
+
+```
+  -h, --help            show this help message and exit
+  --nocleanup           Leave zcashds and test.* datadir on exit or error
+  --noshutdown          Don't stop zcashds after the test execution
+  --srcdir=SRCDIR       Source directory containing zcashd/zcash-cli
+                        (default: ../../src)
+  --tmpdir=TMPDIR       Root directory for datadirs
+  --tracerpc            Print out all RPC calls as they are made
+  --coveragedir=COVERAGEDIR
+                        Write tested RPC commands into this directory
+```
+
+If you set the environment variable `PYTHON_DEBUG=1` you will get some debug
+output (example: `PYTHON_DEBUG=1 qa/pull-tester/rpc-tests.py wallet`).
+
+A 200-block -regtest blockchain and wallets for four nodes
+is created the first time a regression test is run and
+is stored in the cache/ directory.  Each node has the miner
+subsidy from 25 mature blocks (25*10=250 ZEC) in its wallet.
+
+After the first run, the cache/ blockchain and wallets are
+copied into a temporary directory and used as the initial
+test state.
+
+If you get into a bad state, you should be able
+to recover with:
+
+```bash
+rm -rf cache
+killall zcashd
+```
+
+Writing tests
+=============
+You are encouraged to write tests for new or existing features.
+Further information about the test framework and individual RPC
+tests is found in [rpc-tests](rpc-tests).

zebra-rpc/qa/base_config.toml

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+[mining]
+miner_address = "t27eWDgjFYJGVXmzrXeVjnb5J3uXDM9xH9v"
+
+[network]
+listen_addr = "127.0.0.1:0"
+network = "Regtest"
+
+[rpc]
+listen_addr = "127.0.0.1:0"
+
+[state]
+cache_dir = ""