| 1 | #!/usr/bin/env python2
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| 2 | """expr_parse_test.py: Tests for expr_parse.py."""
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| 3 | from __future__ import print_function
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| 4 |
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| 5 | import unittest
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| 6 |
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| 7 | from _devbuild.gen.syntax_asdl import source
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| 8 |
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| 9 | from asdl import format as fmt
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| 10 | from core import alloc
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| 11 | from core import error
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| 12 | from core import pyutil
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| 13 | from core import test_lib
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| 14 | from mycpp.mylib import log
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| 15 | from frontend import reader
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| 16 |
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| 17 |
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| 18 | class ExprParseTest(unittest.TestCase):
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| 19 |
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| 20 | def setUp(self):
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| 21 | """Done on every test."""
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| 22 | self.arena = alloc.Arena()
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| 23 | self.arena.PushSource(source.Unused(''))
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| 24 |
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| 25 | loader = pyutil.GetResourceLoader()
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| 26 | ysh_grammar = pyutil.LoadYshGrammar(loader)
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| 27 |
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| 28 | self.parse_ctx = test_lib.InitParseContext(arena=self.arena,
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| 29 | ysh_grammar=ysh_grammar,
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| 30 | do_lossless=True)
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| 31 |
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| 32 | def _ParseOsh(self, code_str):
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| 33 | """Parse a line of OSH, which can include Oil assignments."""
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| 34 | line_reader = reader.StringLineReader(code_str, self.arena)
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| 35 | # the OSH parser hooks into the Oil parser
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| 36 | c_parser = self.parse_ctx.MakeOshParser(line_reader)
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| 37 | node = c_parser.ParseLogicalLine()
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| 38 | print('')
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| 39 | log('\t%s', code_str)
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| 40 | fmt.PrettyPrint(node)
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| 41 | print('')
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| 42 | return node
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| 43 |
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| 44 | def _ParseYshExpression(self, code_str):
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| 45 | """Convenient shortcut."""
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| 46 | node = self._ParseOsh('var x = %s\n' % code_str)
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| 47 |
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| 48 | def testPythonLike(self):
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| 49 | # This works.
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| 50 | node = self._ParseOsh('var x = y + 2 * 3;')
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| 51 |
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| 52 | node = self._ParseOsh(r"var x = r'one\ntwo\n';")
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| 53 | node = self._ParseOsh(r"var x = $'one\ntwo\n';")
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| 54 |
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| 55 | node = self._ParseOsh(r'var x = "one\\ntwo\\n";')
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| 56 |
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| 57 | # These raise NotImplementedError()
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| 58 |
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| 59 | node = self._ParseOsh('var x = [1,2,3];')
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| 60 | node = self._ParseYshExpression('[4+5, 6+7*8]')
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| 61 | node = self._ParseYshExpression('[]')
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| 62 |
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| 63 | node = self._ParseYshExpression('[x for x in y]')
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| 64 | #node = self._ParseYshExpression('{foo: bar}')
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| 65 |
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| 66 | def testShellArrays(self):
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| 67 | node = self._ParseOsh('var x = %(a b);')
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| 68 | node = self._ParseOsh(r"var x = %('c' $'string\n');")
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| 69 | node = self._ParseOsh(r"var x = %($(echo command) $(echo sub));")
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| 70 |
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| 71 | # Can parse multiple arrays (this is a runtime error)
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| 72 | node = self._ParseOsh(r"var x = %(a b) * %($c ${d});")
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| 73 |
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| 74 | # Can parse over multiple lines
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| 75 | node = self._ParseOsh(r"""var x = %(
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| 76 | a
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| 77 | b
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| 78 | c
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| 79 | );""")
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| 80 |
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| 81 | # Test out the DisallowedLineReader
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| 82 | self.assertRaises(error.Parse, self._ParseOsh,
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| 83 | r"""var x = %($(echo command <<EOF
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| 84 | EOF
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| 85 | ))""")
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| 86 |
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| 87 | def testShellCommandSub(self):
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| 88 | node = self._ParseOsh('var x = $(echo hi);')
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| 89 | node = self._ParseOsh('var x = $(echo $(echo hi));')
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| 90 |
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| 91 | # This doesn't use the Reader, so it's allowed
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| 92 | node = self._ParseOsh("""var x = $(echo
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| 93 | hi)
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| 94 | """)
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| 95 |
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| 96 | # Here docs use the Reader, so aren't allowed
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| 97 | self.assertRaises(error.Parse, self._ParseOsh, """var x = $(cat <<EOF
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| 98 | hi
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| 99 | EOF)
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| 100 | """)
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| 101 |
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| 102 | node = self._ParseOsh('var x = $(echo $((1+2)));')
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| 103 | node = self._ParseOsh('var x = $(for i in 1 2 3; do echo $i; done);')
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| 104 |
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| 105 | node = self._ParseOsh('var x = %(a b)')
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| 106 |
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| 107 | # TODO: Recursive 'var' shouldn't be allowed!
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| 108 | return
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| 109 | node = self._ParseOsh('var x = $(var x = %(a b););')
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| 110 | node = self._ParseOsh('var x = $(var x = %(a b));')
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| 111 |
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| 112 | def testOtherExpr(self):
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| 113 | """Some examples copied from pgen2/pgen2-test.sh mode-test."""
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| 114 |
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| 115 | CASES = [
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| 116 | #'$/ x /',
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| 117 | # TODO: Put this back after fixing double quoted strings in expression
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| 118 | # mode.
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| 119 | #'$/ "." [a-z A-Z] y /',
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| 120 | #'$[echo hi]',
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| 121 | '$(echo hi)',
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| 122 |
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| 123 | # TODO: Add these back
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| 124 | '${x}',
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| 125 | '"quoted ${x}"',
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| 126 | ]
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| 127 |
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| 128 | # array literal
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| 129 | for c in CASES:
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| 130 | print('--- %s' % c)
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| 131 | node = self._ParseYshExpression(c)
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| 132 |
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| 133 | def testLexer(self):
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| 134 | CASES = [
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| 135 | ("= x }", 4),
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| 136 | ("= x;}", 3),
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| 137 | ("= x; }", 3),
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| 138 | ("echo $x;}", 8),
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| 139 | ("echo $x; }", 8),
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| 140 | ("= x\n}", 3),
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| 141 | ("echo $x\n}", 8),
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| 142 | ]
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| 143 |
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| 144 | for code_str, end_pos in CASES:
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| 145 | line_reader = reader.StringLineReader(code_str, self.arena)
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| 146 | cmd_parser = self.parse_ctx.MakeOshParser(line_reader)
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| 147 | lexer = cmd_parser.lexer
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| 148 |
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| 149 | node = cmd_parser.ParseCommand()
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| 150 |
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| 151 | # Assert that we are at the RBrace. Ie,
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| 152 | # 'x }\n'
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| 153 | # ^
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| 154 | self.assertEqual(end_pos, lexer.line_lexer.line_pos)
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| 155 |
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| 156 | print("-----")
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| 157 | print("%r" % lexer.line_lexer.src_line.content)
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| 158 | print(" " * (lexer.line_lexer.line_pos + 1) + "^")
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| 159 | print("-----")
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| 160 |
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| 161 |
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| 162 | if __name__ == '__main__':
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| 163 | unittest.main()
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