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Start generating really random strings with the fuzzer

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Dave Halter
2019-01-06 20:51:49 +01:00
parent 94bd48bae1
commit 6f63147f69
1 changed files with 19 additions and 2 deletions
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21
test/fuzz_diff_parser.py
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@@ -45,6 +45,15 @@ def find_python_files_in_tree(file_path):
yield os.path.join(root, name)
class LineReplacement:
def __init__(self, line_nr, new_line):
self._line_nr = line_nr
self._new_line = new_line
def apply(self, code_lines):
code_lines[self._line_nr] = self._new_line
class LineDeletion:
def __init__(self, line_nr):
self.line_nr = line_nr
@@ -82,12 +91,20 @@ class FileModification:
if not lines:
break
if random.choice([False, True]):
rand = random.randint(1, 3)
if rand == 1:
l = LineDeletion(random_line())
else:
elif rand == 2:
# Copy / Insertion
# Make it possible to insert into the first and the last line
l = LineCopy(random_line(), random_line(include_end=True))
elif rand == 3:
# Modify a line in some weird random ways.
line_nr = random_line()
line = lines[line_nr]
column = random.randint(0, len(line))
random_string = ''.join(chr(random.randint(0, 1000)) for _ in range(5))
l = LineReplacement(line_nr, line[:column] + random_string + line[column:])
l.apply(lines)
yield l