218 lines
7.8 KiB
Python
218 lines
7.8 KiB
Python
from __future__ import absolute_import
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import os
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import unittest
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import tempfile
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from .Compiler import Errors
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from .CodeWriter import CodeWriter
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from .Compiler.TreeFragment import TreeFragment, strip_common_indent
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from .Compiler.Visitor import TreeVisitor, VisitorTransform
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from .Compiler import TreePath
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class NodeTypeWriter(TreeVisitor):
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def __init__(self):
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super(NodeTypeWriter, self).__init__()
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self._indents = 0
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self.result = []
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def visit_Node(self, node):
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if not self.access_path:
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name = u"(root)"
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else:
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tip = self.access_path[-1]
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if tip[2] is not None:
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name = u"%s[%d]" % tip[1:3]
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else:
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name = tip[1]
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self.result.append(u" " * self._indents +
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u"%s: %s" % (name, node.__class__.__name__))
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self._indents += 1
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self.visitchildren(node)
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self._indents -= 1
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def treetypes(root):
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"""Returns a string representing the tree by class names.
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There's a leading and trailing whitespace so that it can be
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compared by simple string comparison while still making test
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cases look ok."""
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w = NodeTypeWriter()
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w.visit(root)
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return u"\n".join([u""] + w.result + [u""])
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class CythonTest(unittest.TestCase):
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def setUp(self):
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self.listing_file = Errors.listing_file
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self.echo_file = Errors.echo_file
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Errors.listing_file = Errors.echo_file = None
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def tearDown(self):
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Errors.listing_file = self.listing_file
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Errors.echo_file = self.echo_file
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def assertLines(self, expected, result):
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"Checks that the given strings or lists of strings are equal line by line"
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if not isinstance(expected, list):
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expected = expected.split(u"\n")
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if not isinstance(result, list):
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result = result.split(u"\n")
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for idx, (expected_line, result_line) in enumerate(zip(expected, result)):
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self.assertEqual(expected_line, result_line,
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"Line %d:\nExp: %s\nGot: %s" % (idx, expected_line, result_line))
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self.assertEqual(len(expected), len(result),
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"Unmatched lines. Got:\n%s\nExpected:\n%s" % ("\n".join(expected), u"\n".join(result)))
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def codeToLines(self, tree):
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writer = CodeWriter()
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writer.write(tree)
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return writer.result.lines
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def codeToString(self, tree):
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return "\n".join(self.codeToLines(tree))
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def assertCode(self, expected, result_tree):
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result_lines = self.codeToLines(result_tree)
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expected_lines = strip_common_indent(expected.split("\n"))
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for idx, (line, expected_line) in enumerate(zip(result_lines, expected_lines)):
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self.assertEqual(expected_line, line,
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"Line %d:\nGot: %s\nExp: %s" % (idx, line, expected_line))
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self.assertEqual(len(result_lines), len(expected_lines),
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"Unmatched lines. Got:\n%s\nExpected:\n%s" % ("\n".join(result_lines), expected))
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def assertNodeExists(self, path, result_tree):
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self.assertNotEqual(TreePath.find_first(result_tree, path), None,
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"Path '%s' not found in result tree" % path)
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def fragment(self, code, pxds=None, pipeline=None):
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"Simply create a tree fragment using the name of the test-case in parse errors."
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if pxds is None:
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pxds = {}
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if pipeline is None:
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pipeline = []
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name = self.id()
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if name.startswith("__main__."):
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name = name[len("__main__."):]
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name = name.replace(".", "_")
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return TreeFragment(code, name, pxds, pipeline=pipeline)
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def treetypes(self, root):
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return treetypes(root)
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def should_fail(self, func, exc_type=Exception):
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"""Calls "func" and fails if it doesn't raise the right exception
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(any exception by default). Also returns the exception in question.
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"""
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try:
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func()
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self.fail("Expected an exception of type %r" % exc_type)
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except exc_type as e:
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self.assertTrue(isinstance(e, exc_type))
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return e
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def should_not_fail(self, func):
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"""Calls func and succeeds if and only if no exception is raised
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(i.e. converts exception raising into a failed testcase). Returns
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the return value of func."""
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try:
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return func()
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except Exception as exc:
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self.fail(str(exc))
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class TransformTest(CythonTest):
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"""
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Utility base class for transform unit tests. It is based around constructing
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test trees (either explicitly or by parsing a Cython code string); running
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the transform, serialize it using a customized Cython serializer (with
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special markup for nodes that cannot be represented in Cython),
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and do a string-comparison line-by-line of the result.
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To create a test case:
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- Call run_pipeline. The pipeline should at least contain the transform you
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are testing; pyx should be either a string (passed to the parser to
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create a post-parse tree) or a node representing input to pipeline.
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The result will be a transformed result.
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- Check that the tree is correct. If wanted, assertCode can be used, which
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takes a code string as expected, and a ModuleNode in result_tree
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(it serializes the ModuleNode to a string and compares line-by-line).
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All code strings are first stripped for whitespace lines and then common
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indentation.
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Plans: One could have a pxd dictionary parameter to run_pipeline.
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"""
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def run_pipeline(self, pipeline, pyx, pxds=None):
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if pxds is None:
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pxds = {}
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tree = self.fragment(pyx, pxds).root
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# Run pipeline
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for T in pipeline:
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tree = T(tree)
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return tree
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class TreeAssertVisitor(VisitorTransform):
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# actually, a TreeVisitor would be enough, but this needs to run
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# as part of the compiler pipeline
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def visit_CompilerDirectivesNode(self, node):
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directives = node.directives
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if 'test_assert_path_exists' in directives:
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for path in directives['test_assert_path_exists']:
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if TreePath.find_first(node, path) is None:
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Errors.error(
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node.pos,
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"Expected path '%s' not found in result tree" % path)
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if 'test_fail_if_path_exists' in directives:
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for path in directives['test_fail_if_path_exists']:
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if TreePath.find_first(node, path) is not None:
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Errors.error(
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node.pos,
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"Unexpected path '%s' found in result tree" % path)
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self.visitchildren(node)
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return node
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visit_Node = VisitorTransform.recurse_to_children
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def unpack_source_tree(tree_file, dir=None):
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if dir is None:
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dir = tempfile.mkdtemp()
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header = []
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cur_file = None
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f = open(tree_file)
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try:
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lines = f.readlines()
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finally:
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f.close()
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del f
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try:
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for line in lines:
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if line[:5] == '#####':
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filename = line.strip().strip('#').strip().replace('/', os.path.sep)
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path = os.path.join(dir, filename)
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if not os.path.exists(os.path.dirname(path)):
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os.makedirs(os.path.dirname(path))
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if cur_file is not None:
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f, cur_file = cur_file, None
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f.close()
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cur_file = open(path, 'w')
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elif cur_file is not None:
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cur_file.write(line)
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elif line.strip() and not line.lstrip().startswith('#'):
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if line.strip() not in ('"""', "'''"):
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header.append(line)
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finally:
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if cur_file is not None:
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cur_file.close()
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return dir, ''.join(header)
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