From a43be0b7948d2596edcd9fe7258e81d6e31a70c8 Mon Sep 17 00:00:00 2001
From: Mike Crute <mcrute@gmail.com>
Date: Tue, 3 Nov 2009 14:56:00 -0500
Subject: Initial import

---
 machineout.py | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 machineout.py

(limited to 'machineout.py')

diff --git a/machineout.py b/machineout.py
new file mode 100644
index 0000000..c074e30
--- /dev/null
+++ b/machineout.py
@@ -0,0 +1,119 @@
+
+"""
+Formats nose output into format easily parsable by machine.
+
+It is intended to be use to integrate nose with your IDE such as Vim.
+
+@author: Max Ischenko <ischenko@gmail.com>
+"""
+
+import re
+import os
+import os.path
+import traceback
+from nose.plugins import Plugin
+
+__all__ = ['NoseMachineReadableOutput']
+
+try:
+    import doctest
+    doctest_fname = re.sub('\.py.?$', '.py', doctest.__file__)
+    del doctest
+except ImportError:
+    doctest_fname = None
+
+class dummystream:
+    def write(self, *arg):
+        pass
+    def writeln(self, *arg):
+        pass
+
+def is_doctest_traceback(fname):
+    return fname == doctest_fname
+
+class PluginError(Exception):
+    def __repr__(self):
+        s = super(PluginError, self).__repr__()
+        return s + "\nReport bugs to ischenko@gmail.com."
+
+class NoseMachineReadableOutput(Plugin):
+
+    """
+    Output errors and failures in a machine-readable way.
+    """
+
+    name = 'machineout'
+
+    doctest_failure_re = re.compile('File "([^"]+)", line (\d+), in ([^\n]+)\n(.+)',
+            re.DOTALL)
+
+    def __init__(self):
+        super(NoseMachineReadableOutput, self).__init__()
+        self.basepath = os.getcwd()
+
+    def add_options(self, parser, env):
+        super(NoseMachineReadableOutput, self).add_options(parser, env)
+        parser.add_option("--machine-output", action="store_true",
+                          dest="machine_output",
+                          default=False,
+                          help="Reports test results in easily parsable format.")
+
+    def configure(self, options, conf):
+        super(NoseMachineReadableOutput, self).configure(options, conf)
+        self.enabled = options.machine_output
+
+    def addSkip(self, test):
+        pass
+
+    def addDeprecated(self, test):
+        pass
+
+    def addError(self, test, err, capt):
+        self.addFormatted('error', err)
+
+    def addFormatted(self, etype, err):
+        exctype, value, tb = err
+        fulltb = traceback.extract_tb(tb)
+        fname, lineno, funname, msg = fulltb[-1]
+        # explicit support for doctests is needed
+        if is_doctest_traceback(fname):
+            # doctest traceback includes pre-formatted error message
+            # which we parse (in a very crude way).
+            n = value.args[0].rindex('-'*20)
+            formatted_msg = value.args[0][n+20+1:]
+            m = self.doctest_failure_re.match(formatted_msg)
+            if not m:
+                raise RuntimeError("Can't parse doctest output: %r" % value.args[0])
+            fname, lineno, funname, msg = m.groups()
+            if '.' in funname: # strip module package name, if any
+                funname = funname.split('.')[-1]
+            lineno = int(lineno)
+            lines = msg.split('\n')
+            msg0 = lines[0]
+        else:
+            lines = traceback.format_exception_only(exctype, value)
+            lines = [line.strip('\n') for line in lines]
+            msg0 = lines[0]
+        fname = self.format_testfname(fname)
+        prefix = "%s:%d" % (fname, lineno)
+        self.stream.writeln("%s: In %s" % (fname, funname))
+        self.stream.writeln("%s: %s: %s" % (prefix, etype, msg0))
+        if len(lines) > 1:
+            pad = ' '*(len(etype)+1)
+            for line in lines[1:]:
+                self.stream.writeln("%s: %s %s" % (prefix, pad, line))
+
+    def format_testfname(self, fname):
+        "Strips common path segments if any."
+        if fname.startswith(self.basepath):
+            return fname[len(self.basepath)+1:]
+        return fname
+
+    def addFailure(self, test, err, capt, tb_info):
+        self.addFormatted('fail', err)
+
+    def setOutputStream(self, stream):
+        # grab for own use
+        self.stream = stream        
+        # return dummy stream to supress normal output
+        return dummystream()
-- 
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