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90b8e7d2bc
- confusing line_offset parameter -> first_line parameter - systematically test and fix new file parameter - remove redundant Bytecode.show_info() API - rename Bytecode.display_code() to Bytecode.dis() and have it return the multi-line string rather than printing it directly - eliminated some not-so-helpful helpers from the bytecode_helper test support module Also fixed a longstanding defect (worked around in the test suite) where lines emitted by the dis module could include trailing white space. That no longer happens, allowing the formatting tests to be simplified to use plain string comparisons.
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
"""bytecode_helper - support tools for testing correct bytecode generation"""
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import unittest
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import dis
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import io
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_UNSPECIFIED = object()
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class BytecodeTestCase(unittest.TestCase):
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"""Custom assertion methods for inspecting bytecode."""
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def get_disassembly_as_string(self, co):
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s = io.StringIO()
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dis.dis(co, file=s)
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return s.getvalue()
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def assertInBytecode(self, x, opname, argval=_UNSPECIFIED):
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"""Returns instr if op is found, otherwise throws AssertionError"""
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for instr in dis.get_instructions(x):
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if instr.opname == opname:
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if argval is _UNSPECIFIED or instr.argval == argval:
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return instr
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disassembly = self.get_disassembly_as_string(x)
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if argval is _UNSPECIFIED:
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msg = '%s not found in bytecode:\n%s' % (opname, disassembly)
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else:
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msg = '(%s,%r) not found in bytecode:\n%s'
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msg = msg % (opname, argval, disassembly)
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self.fail(msg)
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def assertNotInBytecode(self, x, opname, argval=_UNSPECIFIED):
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"""Throws AssertionError if op is found"""
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for instr in dis.get_instructions(x):
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if instr.opname == opname:
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disassembly = self.get_disassembly_as_string(co)
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if opargval is _UNSPECIFIED:
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msg = '%s occurs in bytecode:\n%s' % (opname, disassembly)
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elif instr.argval == argval:
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msg = '(%s,%r) occurs in bytecode:\n%s'
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msg = msg % (opname, argval, disassembly)
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self.fail(msg)
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