Add basic coverage reporting for RPC tests

Thanks to @MarcoFalke @dexX7 @laanwj for review.

6 files changed, 181 insertions, 24 deletions

diff --git a/qa/rpc-tests/getblocktemplate_longpoll.py b/qa/rpc-tests/getblocktemplate_longpoll.py
index aab4562422..1ddff8a298 100755
--- a/qa/rpc-tests/getblocktemplate_longpoll.py
+++ b/qa/rpc-tests/getblocktemplate_longpoll.py
@@ -38,7 +38,7 @@ class LongpollThread(threading.Thread):
         self.longpollid = templat['longpollid']
         # create a new connection to the node, we can't use the same
         # connection from two threads
-        self.node = AuthServiceProxy(node.url, timeout=600)
+        self.node = get_rpc_proxy(node.url, 1, timeout=600)
 
     def run(self):
         self.node.getblocktemplate({'longpollid':self.longpollid})
diff --git a/qa/rpc-tests/rpcbind_test.py b/qa/rpc-tests/rpcbind_test.py
index 04110c2831..7a9da66787 100755
--- a/qa/rpc-tests/rpcbind_test.py
+++ b/qa/rpc-tests/rpcbind_test.py
@@ -47,7 +47,7 @@ def run_allowip_test(tmpdir, allow_ips, rpchost, rpcport):
     try:
         # connect to node through non-loopback interface
         url = "http://rt:rt@%s:%d" % (rpchost, rpcport,)
-        node = AuthServiceProxy(url)
+        node = get_rpc_proxy(url, 1)
         node.getinfo()
     finally:
         node = None # make sure connection will be garbage collected and closed
diff --git a/qa/rpc-tests/test_framework/authproxy.py b/qa/rpc-tests/test_framework/authproxy.py
index 33014dc139..fba469a0dd 100644
--- a/qa/rpc-tests/test_framework/authproxy.py
+++ b/qa/rpc-tests/test_framework/authproxy.py
@@ -69,7 +69,7 @@ class AuthServiceProxy(object):
 
     def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connection=None):
         self.__service_url = service_url
-        self.__service_name = service_name
+        self._service_name = service_name
         self.__url = urlparse.urlparse(service_url)
         if self.__url.port is None:
             port = 80
@@ -102,8 +102,8 @@ class AuthServiceProxy(object):
         if name.startswith('__') and name.endswith('__'):
             # Python internal stuff
             raise AttributeError
-        if self.__service_name is not None:
-            name = "%s.%s" % (self.__service_name, name)
+        if self._service_name is not None:
+            name = "%s.%s" % (self._service_name, name)
         return AuthServiceProxy(self.__service_url, name, connection=self.__conn)
 
     def _request(self, method, path, postdata):
@@ -129,10 +129,10 @@ class AuthServiceProxy(object):
     def __call__(self, *args):
         AuthServiceProxy.__id_count += 1
 
-        log.debug("-%s-> %s %s"%(AuthServiceProxy.__id_count, self.__service_name,
+        log.debug("-%s-> %s %s"%(AuthServiceProxy.__id_count, self._service_name,
                                  json.dumps(args, default=EncodeDecimal)))
         postdata = json.dumps({'version': '1.1',
-                               'method': self.__service_name,
+                               'method': self._service_name,
                                'params': args,
                                'id': AuthServiceProxy.__id_count}, default=EncodeDecimal)
         response = self._request('POST', self.__url.path, postdata)
diff --git a/qa/rpc-tests/test_framework/coverage.py b/qa/rpc-tests/test_framework/coverage.py
new file mode 100644
index 0000000000..50f066a850
--- /dev/null
+++ b/qa/rpc-tests/test_framework/coverage.py
@@ -0,0 +1,101 @@
+"""
+This module contains utilities for doing coverage analysis on the RPC
+interface.
+
+It provides a way to track which RPC commands are exercised during
+testing.
+
+"""
+import os
+
+
+REFERENCE_FILENAME = 'rpc_interface.txt'
+
+
+class AuthServiceProxyWrapper(object):
+    """
+    An object that wraps AuthServiceProxy to record specific RPC calls.
+
+    """
+    def __init__(self, auth_service_proxy_instance, coverage_logfile=None):
+        """
+        Kwargs:
+            auth_service_proxy_instance (AuthServiceProxy): the instance
+                being wrapped.
+            coverage_logfile (str): if specified, write each service_name
+                out to a file when called.
+
+        """
+        self.auth_service_proxy_instance = auth_service_proxy_instance
+        self.coverage_logfile = coverage_logfile
+
+    def __getattr__(self, *args, **kwargs):
+        return_val = self.auth_service_proxy_instance.__getattr__(
+            *args, **kwargs)
+
+        return AuthServiceProxyWrapper(return_val, self.coverage_logfile)
+
+    def __call__(self, *args, **kwargs):
+        """
+        Delegates to AuthServiceProxy, then writes the particular RPC method
+        called to a file.
+
+        """
+        return_val = self.auth_service_proxy_instance.__call__(*args, **kwargs)
+        rpc_method = self.auth_service_proxy_instance._service_name
+
+        if self.coverage_logfile:
+            with open(self.coverage_logfile, 'a+') as f:
+                f.write("%s\n" % rpc_method)
+
+        return return_val
+
+    @property
+    def url(self):
+        return self.auth_service_proxy_instance.url
+
+
+def get_filename(dirname, n_node):
+    """
+    Get a filename unique to the test process ID and node.
+
+    This file will contain a list of RPC commands covered.
+    """
+    pid = str(os.getpid())
+    return os.path.join(
+        dirname, "coverage.pid%s.node%s.txt" % (pid, str(n_node)))
+
+
+def write_all_rpc_commands(dirname, node):
+    """
+    Write out a list of all RPC functions available in `bitcoin-cli` for
+    coverage comparison. This will only happen once per coverage
+    directory.
+
+    Args:
+        dirname (str): temporary test dir
+        node (AuthServiceProxy): client
+
+    Returns:
+        bool. if the RPC interface file was written.
+
+    """
+    filename = os.path.join(dirname, REFERENCE_FILENAME)
+
+    if os.path.isfile(filename):
+        return False
+
+    help_output = node.help().split('\n')
+    commands = set()
+
+    for line in help_output:
+        line = line.strip()
+
+        # Ignore blanks and headers
+        if line and not line.startswith('='):
+            commands.add("%s\n" % line.split()[0])
+
+    with open(filename, 'w') as f:
+        f.writelines(list(commands))
+
+    return True
diff --git a/qa/rpc-tests/test_framework/test_framework.py b/qa/rpc-tests/test_framework/test_framework.py
index 5671431f6e..ae2d91ab60 100755
--- a/qa/rpc-tests/test_framework/test_framework.py
+++ b/qa/rpc-tests/test_framework/test_framework.py
@@ -13,8 +13,20 @@ import shutil
 import tempfile
 import traceback
 
+from .util import (
+    initialize_chain,
+    assert_equal,
+    start_nodes,
+    connect_nodes_bi,
+    sync_blocks,
+    sync_mempools,
+    stop_nodes,
+    wait_bitcoinds,
+    enable_coverage,
+    check_json_precision,
+    initialize_chain_clean,
+)
 from authproxy import AuthServiceProxy, JSONRPCException
-from util import *
 
 
 class BitcoinTestFramework(object):
@@ -96,6 +108,8 @@ class BitcoinTestFramework(object):
                           help="Root directory for datadirs")
         parser.add_option("--tracerpc", dest="trace_rpc", default=False, action="store_true",
                           help="Print out all RPC calls as they are made")
+        parser.add_option("--coveragedir", dest="coveragedir",
+                          help="Write tested RPC commands into this directory")
         self.add_options(parser)
         (self.options, self.args) = parser.parse_args()
 
@@ -103,6 +117,9 @@ class BitcoinTestFramework(object):
             import logging
             logging.basicConfig(level=logging.DEBUG)
 
+        if self.options.coveragedir:
+            enable_coverage(self.options.coveragedir)
+
         os.environ['PATH'] = self.options.srcdir+":"+os.environ['PATH']
 
         check_json_precision()
@@ -173,7 +190,8 @@ class ComparisonTestFramework(BitcoinTestFramework):
         initialize_chain_clean(self.options.tmpdir, self.num_nodes)
 
     def setup_network(self):
-        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir,
-                                    extra_args=[['-debug', '-whitelist=127.0.0.1']] * self.num_nodes,
-                                    binary=[self.options.testbinary] +
-                                           [self.options.refbinary]*(self.num_nodes-1))
+        self.nodes = start_nodes(
+            self.num_nodes, self.options.tmpdir,
+            extra_args=[['-debug', '-whitelist=127.0.0.1']] * self.num_nodes,
+            binary=[self.options.testbinary] +
+            [self.options.refbinary]*(self.num_nodes-1))
diff --git a/qa/rpc-tests/test_framework/util.py b/qa/rpc-tests/test_framework/util.py
index 3759cc8162..30dd5de585 100644
--- a/qa/rpc-tests/test_framework/util.py
+++ b/qa/rpc-tests/test_framework/util.py
@@ -17,8 +17,43 @@ import subprocess
 import time
 import re
 
-from authproxy import AuthServiceProxy, JSONRPCException
-from util import *
+from . import coverage
+from .authproxy import AuthServiceProxy, JSONRPCException
+
+COVERAGE_DIR = None
+
+
+def enable_coverage(dirname):
+    """Maintain a log of which RPC calls are made during testing."""
+    global COVERAGE_DIR
+    COVERAGE_DIR = dirname
+
+
+def get_rpc_proxy(url, node_number, timeout=None):
+    """
+    Args:
+        url (str): URL of the RPC server to call
+        node_number (int): the node number (or id) that this calls to
+
+    Kwargs:
+        timeout (int): HTTP timeout in seconds
+
+    Returns:
+        AuthServiceProxy. convenience object for making RPC calls.
+
+    """
+    proxy_kwargs = {}
+    if timeout is not None:
+        proxy_kwargs['timeout'] = timeout
+
+    proxy = AuthServiceProxy(url, **proxy_kwargs)
+    proxy.url = url  # store URL on proxy for info
+
+    coverage_logfile = coverage.get_filename(
+        COVERAGE_DIR, node_number) if COVERAGE_DIR else None
+
+    return coverage.AuthServiceProxyWrapper(proxy, coverage_logfile)
+
 
 def p2p_port(n):
     return 11000 + n + os.getpid()%999
@@ -79,13 +114,13 @@ def initialize_chain(test_dir):
     """
 
     if (not os.path.isdir(os.path.join("cache","node0"))
-        or not os.path.isdir(os.path.join("cache","node1")) 
-        or not os.path.isdir(os.path.join("cache","node2")) 
+        or not os.path.isdir(os.path.join("cache","node1"))
+        or not os.path.isdir(os.path.join("cache","node2"))
         or not os.path.isdir(os.path.join("cache","node3"))):
 
         #find and delete old cache directories if any exist
         for i in range(4):
-            if os.path.isdir(os.path.join("cache","node"+str(i))): 
+            if os.path.isdir(os.path.join("cache","node"+str(i))):
                 shutil.rmtree(os.path.join("cache","node"+str(i)))
 
         devnull = open(os.devnull, "w")
@@ -103,11 +138,13 @@ def initialize_chain(test_dir):
             if os.getenv("PYTHON_DEBUG", ""):
                 print "initialize_chain: bitcoin-cli -rpcwait getblockcount completed"
         devnull.close()
+
         rpcs = []
+
         for i in range(4):
             try:
-                url = "http://rt:rt@127.0.0.1:%d"%(rpc_port(i),)
-                rpcs.append(AuthServiceProxy(url))
+                url = "http://rt:rt@127.0.0.1:%d" % (rpc_port(i),)
+                rpcs.append(get_rpc_proxy(url, i))
             except:
                 sys.stderr.write("Error connecting to "+url+"\n")
                 sys.exit(1)
@@ -190,11 +227,12 @@ def start_node(i, dirname, extra_args=None, rpchost=None, timewait=None, binary=
         print "start_node: calling bitcoin-cli -rpcwait getblockcount returned"
     devnull.close()
     url = "http://rt:rt@%s:%d" % (rpchost or '127.0.0.1', rpc_port(i))
-    if timewait is not None:
-        proxy = AuthServiceProxy(url, timeout=timewait)
-    else:
-        proxy = AuthServiceProxy(url)
-    proxy.url = url # store URL on proxy for info
+
+    proxy = get_rpc_proxy(url, i, timeout=timewait)
+
+    if COVERAGE_DIR:
+        coverage.write_all_rpc_commands(COVERAGE_DIR, proxy)
+
     return proxy
 
 def start_nodes(num_nodes, dirname, extra_args=None, rpchost=None, binary=None):