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111 lines
3.7 KiB
Python
Executable File
111 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python2
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#
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# This script is written to look through source code files, looking for
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# missing unit-tests and doc-block comments. It's mostly ugly, but so is
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# the task at hand.
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import os
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import re
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# This is sort of a monster function, but I've tried to lift as much out
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# of the logic as I could. Basically, this function tries to find
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# anything that's "wrong", which is one of:
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#
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# - missing docblock comment for functions
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# - missing test for a function
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def parse(fname):
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lines = []
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with open(fname, 'r') as f:
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lines = f.read().split("\n")
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length = len(lines)
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# We probably got a directory in the path (like './src'); let's chop
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# it off.
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basefname = os.path.basename(fname)
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# The suite is the name of the test suite as Criterion would define
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# it.
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suite = suite_name_from_file(basefname)
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for num in range(0, length):
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match = find_func_name(lines[num])
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if match is not None:
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# The test name is a part of the function
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test_name = test_name_from_func(suite, match.group(1))
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# We want to find something in a test file for each of the
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# functions we define.
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if not has_test('tests/' + basefname, suite, test_name):
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print "Missing test: %s_%s" % (suite, test_name)
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# We also want to have some doc-block comment for every
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# function we write.
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if not has_doc_block(lines, num):
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print "Missing docblock comment: %s:%d: %s" % (fname, num, lines[num])
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# Given a source file name, extract the suite name (which is really just
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# the name of the file minus the '.c' part, and -- well, you can read
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# the source).
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def suite_name_from_file(fname):
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return fname.replace('.c', '').replace('.', '_')
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# Given a line of source code, figure out if there's a function that's
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# defined there. We define functions in the form of:
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#
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# <type>
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# <func>(...)
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# {
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# <body...>
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# }
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#
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# So we can say a function definition will always begin at the first
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# character on a line in which the name is immediately followed by an
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# open parenthesis.
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def find_func_name(line):
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return re.search(r'^([a-zA-Z_][a-zA-Z0-9_]*)\(', line)
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# Given a suite and a function name, figure out what the test name
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# should be.
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def test_name_from_func(suite, func):
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return func.replace(suite + '_', '')
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# Given a line and a line number, determine if we have a doc-block or
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# not. (Which we can determine because there should be a closing comment
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# token on the line above the type.)
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def has_doc_block(lines, linenum):
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if lines[linenum].find('// ignore docblock') > -1:
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return True
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return linenum-2 >= 0 and (lines[linenum-2] == ' */' or lines[linenum-1] == ' */')
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# Do we have a test for this function? The fname is the test file, and
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# the suite and test are -- well, what they are.
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def has_test(fname, suite, test):
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# This is a bit of fakery, but inspect-c is not (yet) smart enough
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# to know that a macro like `DEFINE_ADDR(xyz)` expands to
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# `mos6502_resolve_xyz` and that the test it should associate is
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# that. So we skip macro function definitions for now.
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if test.isupper():
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return True
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data = ''
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with open(fname, 'r') as f:
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data = f.read()
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return data.find('Test(%s, %s)' % (suite, test)) > -1
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# Walk through a directory, looking for C source files and header files
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# to examine.
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def walk(dname):
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for root, subdirs, subfiles in os.walk(dname):
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for fname in subfiles:
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if fname == 'main.c':
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continue
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if fname[-2:] != '.c' and fname[-2:] != '.h':
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continue
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parse(root + '/' + fname)
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# Walk through the src dir and see what we can see.
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walk('./src')
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# vim:ft=python:
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