[Pkg-bitcoin-commits] [bitcoin] 27/126: [test] Add assert_raises_process_error to assert process errors

[Jonas Smedegaard]

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js pushed a commit to annotated tag debian/0.15.1_dfsg-1
in repository bitcoin.

commit e38211f5e8900ee9027c671d7c655958e4dbe8e7
Author: João Barbosa <joao.paulo.barbosa at gmail.com>
Date:   Wed Sep 6 16:35:57 2017 +0100

    [test] Add assert_raises_process_error to assert process errors
    
    Github-Pull: #11125
    Rebased-From: 232e3e8471edb346c09f906c996b2f350cabc72a
---
 test/functional/test_framework/util.py | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index a5bc495..b2d8199 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -12,6 +12,7 @@ import logging
 import os
 import random
 import re
+from subprocess import CalledProcessError
 import time
 
 from . import coverage
@@ -57,6 +58,30 @@ def assert_raises_message(exc, message, fun, *args, **kwds):
     else:
         raise AssertionError("No exception raised")
 
+def assert_raises_process_error(returncode, output, fun, *args, **kwds):
+    """Execute a process and asserts the process return code and output.
+
+    Calls function `fun` with arguments `args` and `kwds`. Catches a CalledProcessError
+    and verifies that the return code and output are as expected. Throws AssertionError if
+    no CalledProcessError was raised or if the return code and output are not as expected.
+
+    Args:
+        returncode (int): the process return code.
+        output (string): [a substring of] the process output.
+        fun (function): the function to call. This should execute a process.
+        args*: positional arguments for the function.
+        kwds**: named arguments for the function.
+    """
+    try:
+        fun(*args, **kwds)
+    except CalledProcessError as e:
+        if returncode != e.returncode:
+            raise AssertionError("Unexpected returncode %i" % e.returncode)
+        if output not in e.output:
+            raise AssertionError("Expected substring not found:" + e.output)
+    else:
+        raise AssertionError("No exception raised")
+
 def assert_raises_jsonrpc(code, message, fun, *args, **kwds):
     """Run an RPC and verify that a specific JSONRPC exception code and message is raised.
 

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