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view ply-3.8/test/testyacc.py @ 11182:9d5983817909
<wob_jonas> learn Sauron is the eponymous protagonist of the Lord of the Rings series. He serves primarily as narrator and the main driver of the plot. His heroic exploits include the resurrection of the Kings of Men and the conquest of the racists of Gondor. He now leads the Illuminati from his pyramid fort /\xea\x99\xa9\\ .
author | HackBot |
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date | Sat, 02 Sep 2017 18:01:47 +0000 |
parents | 343ff337a19b |
children |
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# testyacc.py import unittest try: import StringIO except ImportError: import io as StringIO import sys import os import warnings import re import platform sys.path.insert(0,"..") sys.tracebacklimit = 0 import ply.yacc def make_pymodule_path(filename): path = os.path.dirname(filename) file = os.path.basename(filename) mod, ext = os.path.splitext(file) if sys.hexversion >= 0x3040000: import importlib.util fullpath = importlib.util.cache_from_source(filename, ext=='.pyc') elif sys.hexversion >= 0x3020000: import imp modname = mod+"."+imp.get_tag()+ext fullpath = os.path.join(path,'__pycache__',modname) else: fullpath = filename return fullpath def pymodule_out_exists(filename): return os.path.exists(make_pymodule_path(filename)) def pymodule_out_remove(filename): os.remove(make_pymodule_path(filename)) def implementation(): if platform.system().startswith("Java"): return "Jython" elif hasattr(sys, "pypy_version_info"): return "PyPy" else: return "CPython" # Check the output to see if it contains all of a set of expected output lines. # This alternate implementation looks weird, but is needed to properly handle # some variations in error message order that occurs due to dict hash table # randomization that was introduced in Python 3.3 def check_expected(result, expected): # Normalize 'state n' text to account for randomization effects in Python 3.3 expected = re.sub(r' state \d+', 'state <n>', expected) result = re.sub(r' state \d+', 'state <n>', result) resultlines = set() for line in result.splitlines(): if line.startswith("WARNING: "): line = line[9:] elif line.startswith("ERROR: "): line = line[7:] resultlines.add(line) # Selectively remove expected lines from the output for eline in expected.splitlines(): resultlines = set(line for line in resultlines if not line.endswith(eline)) # Return True if no result lines remain return not bool(resultlines) def run_import(module): code = "import "+module exec(code) del sys.modules[module] # Tests related to errors and warnings when building parsers class YaccErrorWarningTests(unittest.TestCase): def setUp(self): sys.stderr = StringIO.StringIO() sys.stdout = StringIO.StringIO() try: os.remove("parsetab.py") pymodule_out_remove("parsetab.pyc") except OSError: pass if sys.hexversion >= 0x3020000: warnings.filterwarnings('ignore', category=ResourceWarning) warnings.filterwarnings('ignore', category=DeprecationWarning) def tearDown(self): sys.stderr = sys.__stderr__ sys.stdout = sys.__stdout__ def test_yacc_badargs(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badargs") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_badargs.py:23: Rule 'p_statement_assign' has too many arguments\n" "yacc_badargs.py:27: Rule 'p_statement_expr' requires an argument\n" )) def test_yacc_badid(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badid") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_badid.py:32: Illegal name 'bad&rule' in rule 'statement'\n" "yacc_badid.py:36: Illegal rule name 'bad&rule'\n" )) def test_yacc_badprec(self): try: run_import("yacc_badprec") except ply.yacc.YaccError: result = sys.stderr.getvalue() self.assert_(check_expected(result, "precedence must be a list or tuple\n" )) def test_yacc_badprec2(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badprec2") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Bad precedence table\n" )) def test_yacc_badprec3(self): run_import("yacc_badprec3") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Precedence already specified for terminal 'MINUS'\n" "Generating LALR tables\n" )) def test_yacc_badrule(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_badrule") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_badrule.py:24: Syntax error. Expected ':'\n" "yacc_badrule.py:28: Syntax error in rule 'statement'\n" "yacc_badrule.py:33: Syntax error. Expected ':'\n" "yacc_badrule.py:42: Syntax error. Expected ':'\n" )) def test_yacc_badtok(self): try: run_import("yacc_badtok") except ply.yacc.YaccError: result = sys.stderr.getvalue() self.assert_(check_expected(result, "tokens must be a list or tuple\n")) def test_yacc_dup(self): run_import("yacc_dup") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_dup.py:27: Function p_statement redefined. Previously defined on line 23\n" "Token 'EQUALS' defined, but not used\n" "There is 1 unused token\n" "Generating LALR tables\n" )) def test_yacc_error1(self): try: run_import("yacc_error1") except ply.yacc.YaccError: result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_error1.py:61: p_error() requires 1 argument\n")) def test_yacc_error2(self): try: run_import("yacc_error2") except ply.yacc.YaccError: result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_error2.py:61: p_error() requires 1 argument\n")) def test_yacc_error3(self): try: run_import("yacc_error3") except ply.yacc.YaccError: e = sys.exc_info()[1] result = sys.stderr.getvalue() self.assert_(check_expected(result, "'p_error' defined, but is not a function or method\n")) def test_yacc_error4(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_error4") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_error4.py:62: Illegal rule name 'error'. Already defined as a token\n" )) def test_yacc_error5(self): run_import("yacc_error5") result = sys.stdout.getvalue() self.assert_(check_expected(result, "Group at 3:10 to 3:12\n" "Undefined name 'a'\n" "Syntax error at 'b'\n" "Syntax error at 4:18 to 4:22\n" "Assignment Error at 2:5 to 5:27\n" "13\n" )) def test_yacc_error6(self): run_import("yacc_error6") result = sys.stdout.getvalue() self.assert_(check_expected(result, "a=7\n" "Line 3: Syntax error at '*'\n" "c=21\n" )) def test_yacc_error7(self): run_import("yacc_error7") result = sys.stdout.getvalue() self.assert_(check_expected(result, "a=7\n" "Line 3: Syntax error at '*'\n" "c=21\n" )) def test_yacc_inf(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_inf") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Token 'NUMBER' defined, but not used\n" "There is 1 unused token\n" "Infinite recursion detected for symbol 'statement'\n" "Infinite recursion detected for symbol 'expression'\n" )) def test_yacc_literal(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_literal") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_literal.py:36: Literal token '**' in rule 'expression' may only be a single character\n" )) def test_yacc_misplaced(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_misplaced") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_misplaced.py:32: Misplaced '|'\n" )) def test_yacc_missing1(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_missing1") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_missing1.py:24: Symbol 'location' used, but not defined as a token or a rule\n" )) def test_yacc_nested(self): run_import("yacc_nested") result = sys.stdout.getvalue() self.assert_(check_expected(result, "A\n" "A\n" "A\n", )) def test_yacc_nodoc(self): run_import("yacc_nodoc") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_nodoc.py:27: No documentation string specified in function 'p_statement_expr' (ignored)\n" "Generating LALR tables\n" )) def test_yacc_noerror(self): run_import("yacc_noerror") result = sys.stderr.getvalue() self.assert_(check_expected(result, "no p_error() function is defined\n" "Generating LALR tables\n" )) def test_yacc_nop(self): run_import("yacc_nop") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_nop.py:27: Possible grammar rule 'statement_expr' defined without p_ prefix\n" "Generating LALR tables\n" )) def test_yacc_notfunc(self): run_import("yacc_notfunc") result = sys.stderr.getvalue() self.assert_(check_expected(result, "'p_statement_assign' not defined as a function\n" "Token 'EQUALS' defined, but not used\n" "There is 1 unused token\n" "Generating LALR tables\n" )) def test_yacc_notok(self): try: run_import("yacc_notok") except ply.yacc.YaccError: result = sys.stderr.getvalue() self.assert_(check_expected(result, "No token list is defined\n")) def test_yacc_rr(self): run_import("yacc_rr") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Generating LALR tables\n" "1 reduce/reduce conflict\n" "reduce/reduce conflict in state 15 resolved using rule (statement -> NAME EQUALS NUMBER)\n" "rejected rule (expression -> NUMBER) in state 15\n" )) def test_yacc_rr_unused(self): run_import("yacc_rr_unused") result = sys.stderr.getvalue() self.assert_(check_expected(result, "no p_error() function is defined\n" "Generating LALR tables\n" "3 reduce/reduce conflicts\n" "reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n" "rejected rule (rule4 -> A) in state 1\n" "reduce/reduce conflict in state 1 resolved using rule (rule3 -> A)\n" "rejected rule (rule5 -> A) in state 1\n" "reduce/reduce conflict in state 1 resolved using rule (rule4 -> A)\n" "rejected rule (rule5 -> A) in state 1\n" "Rule (rule5 -> A) is never reduced\n" )) def test_yacc_simple(self): run_import("yacc_simple") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Generating LALR tables\n" )) def test_yacc_sr(self): run_import("yacc_sr") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Generating LALR tables\n" "20 shift/reduce conflicts\n" )) def test_yacc_term1(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_term1") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_term1.py:24: Illegal rule name 'NUMBER'. Already defined as a token\n" )) def test_yacc_unicode_literals(self): run_import("yacc_unicode_literals") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Generating LALR tables\n" )) def test_yacc_unused(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_unused") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_unused.py:62: Symbol 'COMMA' used, but not defined as a token or a rule\n" "Symbol 'COMMA' is unreachable\n" "Symbol 'exprlist' is unreachable\n" )) def test_yacc_unused_rule(self): run_import("yacc_unused_rule") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_unused_rule.py:62: Rule 'integer' defined, but not used\n" "There is 1 unused rule\n" "Symbol 'integer' is unreachable\n" "Generating LALR tables\n" )) def test_yacc_uprec(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_uprec") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_uprec.py:37: Nothing known about the precedence of 'UMINUS'\n" )) def test_yacc_uprec2(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_uprec2") result = sys.stderr.getvalue() self.assert_(check_expected(result, "yacc_uprec2.py:37: Syntax error. Nothing follows %prec\n" )) def test_yacc_prec1(self): self.assertRaises(ply.yacc.YaccError,run_import,"yacc_prec1") result = sys.stderr.getvalue() self.assert_(check_expected(result, "Precedence rule 'left' defined for unknown symbol '+'\n" "Precedence rule 'left' defined for unknown symbol '*'\n" "Precedence rule 'left' defined for unknown symbol '-'\n" "Precedence rule 'left' defined for unknown symbol '/'\n" )) def test_pkg_test1(self): from pkg_test1 import parser self.assertTrue(os.path.exists('pkg_test1/parsing/parsetab.py')) self.assertTrue(os.path.exists('pkg_test1/parsing/lextab.py')) self.assertTrue(os.path.exists('pkg_test1/parsing/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) def test_pkg_test2(self): from pkg_test2 import parser self.assertTrue(os.path.exists('pkg_test2/parsing/calcparsetab.py')) self.assertTrue(os.path.exists('pkg_test2/parsing/calclextab.py')) self.assertTrue(os.path.exists('pkg_test2/parsing/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) def test_pkg_test3(self): from pkg_test3 import parser self.assertTrue(os.path.exists('pkg_test3/generated/parsetab.py')) self.assertTrue(os.path.exists('pkg_test3/generated/lextab.py')) self.assertTrue(os.path.exists('pkg_test3/generated/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) def test_pkg_test4(self): from pkg_test4 import parser self.assertFalse(os.path.exists('pkg_test4/parsing/parsetab.py')) self.assertFalse(os.path.exists('pkg_test4/parsing/lextab.py')) self.assertFalse(os.path.exists('pkg_test4/parsing/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) def test_pkg_test5(self): from pkg_test5 import parser self.assertTrue(os.path.exists('pkg_test5/parsing/parsetab.py')) self.assertTrue(os.path.exists('pkg_test5/parsing/lextab.py')) self.assertTrue(os.path.exists('pkg_test5/parsing/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) def test_pkg_test6(self): from pkg_test6 import parser self.assertTrue(os.path.exists('pkg_test6/parsing/parsetab.py')) self.assertTrue(os.path.exists('pkg_test6/parsing/lextab.py')) self.assertTrue(os.path.exists('pkg_test6/parsing/parser.out')) r = parser.parse('3+4+5') self.assertEqual(r, 12) unittest.main()