772b2ab8ba
We had been using version 3.2 from 2009, which does not have support for t_eof(). Change-Id: Id5610a272fe2cecd586991f4c59f3ec77184164e Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/56342 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
453 lines
19 KiB
Python
453 lines
19 KiB
Python
# testyacc.py
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import unittest
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try:
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import StringIO
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except ImportError:
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import io as StringIO
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import sys
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import os
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import warnings
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import re
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import platform
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sys.path.insert(0,"..")
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sys.tracebacklimit = 0
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import ply.yacc
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def make_pymodule_path(filename):
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path = os.path.dirname(filename)
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file = os.path.basename(filename)
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mod, ext = os.path.splitext(file)
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if sys.hexversion >= 0x3040000:
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import importlib.util
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fullpath = importlib.util.cache_from_source(filename, ext=='.pyc')
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elif sys.hexversion >= 0x3020000:
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import imp
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modname = mod+"."+imp.get_tag()+ext
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fullpath = os.path.join(path,'__pycache__',modname)
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else:
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fullpath = filename
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return fullpath
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def pymodule_out_exists(filename):
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return os.path.exists(make_pymodule_path(filename))
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def pymodule_out_remove(filename):
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os.remove(make_pymodule_path(filename))
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def implementation():
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if platform.system().startswith("Java"):
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return "Jython"
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elif hasattr(sys, "pypy_version_info"):
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return "PyPy"
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else:
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return "CPython"
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# Check the output to see if it contains all of a set of expected output lines.
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# This alternate implementation looks weird, but is needed to properly handle
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# some variations in error message order that occurs due to dict hash table
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# randomization that was introduced in Python 3.3
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def check_expected(result, expected):
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# Normalize 'state n' text to account for randomization effects in Python 3.3
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expected = re.sub(r' state \d+', 'state <n>', expected)
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result = re.sub(r' state \d+', 'state <n>', result)
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resultlines = set()
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for line in result.splitlines():
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if line.startswith("WARNING: "):
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line = line[9:]
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elif line.startswith("ERROR: "):
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line = line[7:]
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resultlines.add(line)
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# Selectively remove expected lines from the output
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for eline in expected.splitlines():
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resultlines = set(line for line in resultlines if not line.endswith(eline))
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# Return True if no result lines remain
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return not bool(resultlines)
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def run_import(module):
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code = "import "+module
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exec(code)
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del sys.modules[module]
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# Tests related to errors and warnings when building parsers
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class YaccErrorWarningTests(unittest.TestCase):
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def setUp(self):
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sys.stderr = StringIO.StringIO()
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sys.stdout = StringIO.StringIO()
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try:
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os.remove("parsetab.py")
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pymodule_out_remove("parsetab.pyc")
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except OSError:
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pass
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if sys.hexversion >= 0x3020000:
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warnings.filterwarnings('ignore', category=ResourceWarning)
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warnings.filterwarnings('ignore', category=DeprecationWarning)
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def tearDown(self):
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sys.stderr = sys.__stderr__
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sys.stdout = sys.__stdout__
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def test_yacc_badargs(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badargs")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_badargs.py:23: Rule 'p_statement_assign' has too many arguments\n"
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"yacc_badargs.py:27: Rule 'p_statement_expr' requires an argument\n"
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))
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def test_yacc_badid(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badid")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_badid.py:32: Illegal name 'bad&rule' in rule 'statement'\n"
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"yacc_badid.py:36: Illegal rule name 'bad&rule'\n"
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))
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def test_yacc_badprec(self):
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try:
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run_import("yacc_badprec")
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except ply.yacc.YaccError:
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"precedence must be a list or tuple\n"
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))
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def test_yacc_badprec2(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badprec2")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Bad precedence table\n"
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))
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def test_yacc_badprec3(self):
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run_import("yacc_badprec3")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Precedence already specified for terminal 'MINUS'\n"
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"Generating LALR tables\n"
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))
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def test_yacc_badrule(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badrule")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_badrule.py:24: Syntax error. Expected ':'\n"
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"yacc_badrule.py:28: Syntax error in rule 'statement'\n"
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"yacc_badrule.py:33: Syntax error. Expected ':'\n"
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"yacc_badrule.py:42: Syntax error. Expected ':'\n"
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))
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def test_yacc_badtok(self):
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try:
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run_import("yacc_badtok")
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except ply.yacc.YaccError:
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"tokens must be a list or tuple\n"))
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def test_yacc_dup(self):
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run_import("yacc_dup")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_dup.py:27: Function p_statement redefined. Previously defined on line 23\n"
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"Token 'EQUALS' defined, but not used\n"
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"There is 1 unused token\n"
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"Generating LALR tables\n"
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))
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def test_yacc_error1(self):
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try:
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run_import("yacc_error1")
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except ply.yacc.YaccError:
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_error1.py:61: p_error() requires 1 argument\n"))
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def test_yacc_error2(self):
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try:
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run_import("yacc_error2")
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except ply.yacc.YaccError:
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_error2.py:61: p_error() requires 1 argument\n"))
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def test_yacc_error3(self):
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try:
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run_import("yacc_error3")
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except ply.yacc.YaccError:
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e = sys.exc_info()[1]
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"'p_error' defined, but is not a function or method\n"))
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def test_yacc_error4(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_error4")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_error4.py:62: Illegal rule name 'error'. Already defined as a token\n"
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))
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def test_yacc_error5(self):
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run_import("yacc_error5")
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result = sys.stdout.getvalue()
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self.assert_(check_expected(result,
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"Group at 3:10 to 3:12\n"
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"Undefined name 'a'\n"
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"Syntax error at 'b'\n"
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"Syntax error at 4:18 to 4:22\n"
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"Assignment Error at 2:5 to 5:27\n"
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"13\n"
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))
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def test_yacc_error6(self):
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run_import("yacc_error6")
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result = sys.stdout.getvalue()
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self.assert_(check_expected(result,
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"a=7\n"
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"Line 3: Syntax error at '*'\n"
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"c=21\n"
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))
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def test_yacc_error7(self):
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run_import("yacc_error7")
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result = sys.stdout.getvalue()
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self.assert_(check_expected(result,
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"a=7\n"
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"Line 3: Syntax error at '*'\n"
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"c=21\n"
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))
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def test_yacc_inf(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_inf")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Token 'NUMBER' defined, but not used\n"
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"There is 1 unused token\n"
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"Infinite recursion detected for symbol 'statement'\n"
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"Infinite recursion detected for symbol 'expression'\n"
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))
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def test_yacc_literal(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_literal")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_literal.py:36: Literal token '**' in rule 'expression' may only be a single character\n"
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))
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def test_yacc_misplaced(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_misplaced")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_misplaced.py:32: Misplaced '|'\n"
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))
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def test_yacc_missing1(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_missing1")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_missing1.py:24: Symbol 'location' used, but not defined as a token or a rule\n"
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))
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def test_yacc_nested(self):
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run_import("yacc_nested")
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result = sys.stdout.getvalue()
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self.assert_(check_expected(result,
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"A\n"
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"A\n"
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"A\n",
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))
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def test_yacc_nodoc(self):
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run_import("yacc_nodoc")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_nodoc.py:27: No documentation string specified in function 'p_statement_expr' (ignored)\n"
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"Generating LALR tables\n"
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))
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def test_yacc_noerror(self):
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run_import("yacc_noerror")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"no p_error() function is defined\n"
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"Generating LALR tables\n"
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))
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def test_yacc_nop(self):
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run_import("yacc_nop")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_nop.py:27: Possible grammar rule 'statement_expr' defined without p_ prefix\n"
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"Generating LALR tables\n"
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))
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def test_yacc_notfunc(self):
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run_import("yacc_notfunc")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"'p_statement_assign' not defined as a function\n"
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"Token 'EQUALS' defined, but not used\n"
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"There is 1 unused token\n"
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"Generating LALR tables\n"
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))
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def test_yacc_notok(self):
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try:
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run_import("yacc_notok")
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except ply.yacc.YaccError:
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"No token list is defined\n"))
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def test_yacc_rr(self):
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run_import("yacc_rr")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Generating LALR tables\n"
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"1 reduce/reduce conflict\n"
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"reduce/reduce conflict in state 15 resolved using rule (statement -> NAME EQUALS NUMBER)\n"
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"rejected rule (expression -> NUMBER) in state 15\n"
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))
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def test_yacc_rr_unused(self):
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run_import("yacc_rr_unused")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"no p_error() function is defined\n"
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"Generating LALR tables\n"
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"3 reduce/reduce conflicts\n"
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"reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n"
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"rejected rule (rule4 -> A) in state 1\n"
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"reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n"
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"rejected rule (rule5 -> A) in state 1\n"
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"reduce/reduce conflict in state 1 resolved using rule (rule4 -> A)\n"
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"rejected rule (rule5 -> A) in state 1\n"
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"Rule (rule5 -> A) is never reduced\n"
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))
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def test_yacc_simple(self):
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run_import("yacc_simple")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Generating LALR tables\n"
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))
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def test_yacc_sr(self):
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run_import("yacc_sr")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Generating LALR tables\n"
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"20 shift/reduce conflicts\n"
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))
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def test_yacc_term1(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_term1")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_term1.py:24: Illegal rule name 'NUMBER'. Already defined as a token\n"
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))
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def test_yacc_unicode_literals(self):
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run_import("yacc_unicode_literals")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Generating LALR tables\n"
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))
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def test_yacc_unused(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_unused")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_unused.py:62: Symbol 'COMMA' used, but not defined as a token or a rule\n"
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"Symbol 'COMMA' is unreachable\n"
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"Symbol 'exprlist' is unreachable\n"
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))
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def test_yacc_unused_rule(self):
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run_import("yacc_unused_rule")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_unused_rule.py:62: Rule 'integer' defined, but not used\n"
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"There is 1 unused rule\n"
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"Symbol 'integer' is unreachable\n"
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"Generating LALR tables\n"
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))
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def test_yacc_uprec(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_uprec")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_uprec.py:37: Nothing known about the precedence of 'UMINUS'\n"
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))
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def test_yacc_uprec2(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_uprec2")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"yacc_uprec2.py:37: Syntax error. Nothing follows %prec\n"
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))
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def test_yacc_prec1(self):
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self.assertRaises(ply.yacc.YaccError,run_import,"yacc_prec1")
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result = sys.stderr.getvalue()
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self.assert_(check_expected(result,
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"Precedence rule 'left' defined for unknown symbol '+'\n"
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"Precedence rule 'left' defined for unknown symbol '*'\n"
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"Precedence rule 'left' defined for unknown symbol '-'\n"
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"Precedence rule 'left' defined for unknown symbol '/'\n"
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))
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def test_pkg_test1(self):
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from pkg_test1 import parser
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self.assertTrue(os.path.exists('pkg_test1/parsing/parsetab.py'))
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self.assertTrue(os.path.exists('pkg_test1/parsing/lextab.py'))
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self.assertTrue(os.path.exists('pkg_test1/parsing/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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def test_pkg_test2(self):
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from pkg_test2 import parser
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self.assertTrue(os.path.exists('pkg_test2/parsing/calcparsetab.py'))
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self.assertTrue(os.path.exists('pkg_test2/parsing/calclextab.py'))
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self.assertTrue(os.path.exists('pkg_test2/parsing/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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def test_pkg_test3(self):
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from pkg_test3 import parser
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self.assertTrue(os.path.exists('pkg_test3/generated/parsetab.py'))
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self.assertTrue(os.path.exists('pkg_test3/generated/lextab.py'))
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self.assertTrue(os.path.exists('pkg_test3/generated/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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def test_pkg_test4(self):
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from pkg_test4 import parser
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self.assertFalse(os.path.exists('pkg_test4/parsing/parsetab.py'))
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self.assertFalse(os.path.exists('pkg_test4/parsing/lextab.py'))
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self.assertFalse(os.path.exists('pkg_test4/parsing/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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def test_pkg_test5(self):
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from pkg_test5 import parser
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self.assertTrue(os.path.exists('pkg_test5/parsing/parsetab.py'))
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self.assertTrue(os.path.exists('pkg_test5/parsing/lextab.py'))
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self.assertTrue(os.path.exists('pkg_test5/parsing/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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def test_pkg_test6(self):
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from pkg_test6 import parser
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self.assertTrue(os.path.exists('pkg_test6/parsing/parsetab.py'))
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self.assertTrue(os.path.exists('pkg_test6/parsing/lextab.py'))
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self.assertTrue(os.path.exists('pkg_test6/parsing/parser.out'))
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r = parser.parse('3+4+5')
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self.assertEqual(r, 12)
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unittest.main()
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