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from textwrap import dedent
import pytest
from parso import parse
# Using star import for easier eval testing below.
from parso.python.tree import * # noqa: F403
from parso.tree import * # noqa: F403
from parso.tree import ErrorLeaf, TypedLeaf
@pytest.mark.parametrize(
'indent,expected_dump', [
(None, "Module(["
"Lambda(["
"Keyword('lambda', (1, 0)), "
"Param(["
"Name('x', (1, 7), prefix=' '), "
"Operator(',', (1, 8)), "
"]), "
"Param(["
"Name('y', (1, 10), prefix=' '), "
"]), "
"Operator(':', (1, 11)), "
"PythonNode('arith_expr', ["
"Name('x', (1, 13), prefix=' '), "
"Operator('+', (1, 15), prefix=' '), "
"Name('y', (1, 17), prefix=' '), "
"]), "
"]), "
"EndMarker('', (1, 18)), "
"])"),
(0, dedent('''\
Module([
Lambda([
Keyword('lambda', (1, 0)),
Param([
Name('x', (1, 7), prefix=' '),
Operator(',', (1, 8)),
]),
Param([
Name('y', (1, 10), prefix=' '),
]),
Operator(':', (1, 11)),
PythonNode('arith_expr', [
Name('x', (1, 13), prefix=' '),
Operator('+', (1, 15), prefix=' '),
Name('y', (1, 17), prefix=' '),
]),
]),
EndMarker('', (1, 18)),
])''')),
(4, dedent('''\
Module([
Lambda([
Keyword('lambda', (1, 0)),
Param([
Name('x', (1, 7), prefix=' '),
Operator(',', (1, 8)),
]),
Param([
Name('y', (1, 10), prefix=' '),
]),
Operator(':', (1, 11)),
PythonNode('arith_expr', [
Name('x', (1, 13), prefix=' '),
Operator('+', (1, 15), prefix=' '),
Name('y', (1, 17), prefix=' '),
]),
]),
EndMarker('', (1, 18)),
])''')),
('\t', dedent('''\
Module([
\tLambda([
\t\tKeyword('lambda', (1, 0)),
\t\tParam([
\t\t\tName('x', (1, 7), prefix=' '),
\t\t\tOperator(',', (1, 8)),
\t\t]),
\t\tParam([
\t\t\tName('y', (1, 10), prefix=' '),
\t\t]),
\t\tOperator(':', (1, 11)),
\t\tPythonNode('arith_expr', [
\t\t\tName('x', (1, 13), prefix=' '),
\t\t\tOperator('+', (1, 15), prefix=' '),
\t\t\tName('y', (1, 17), prefix=' '),
\t\t]),
\t]),
\tEndMarker('', (1, 18)),
])''')),
]
)
def test_dump_parser_tree(indent, expected_dump):
code = "lambda x, y: x + y"
module = parse(code)
assert module.dump(indent=indent) == expected_dump
# Check that dumped tree can be eval'd to recover the parser tree and original code.
recovered_code = eval(expected_dump).get_code()
assert recovered_code == code
@pytest.mark.parametrize(
'node,expected_dump,expected_code', [
( # Dump intermediate node (not top level module)
parse("def foo(x, y): return x + y").children[0], dedent('''\
Function([
Keyword('def', (1, 0)),
Name('foo', (1, 4), prefix=' '),
PythonNode('parameters', [
Operator('(', (1, 7)),
Param([
Name('x', (1, 8)),
Operator(',', (1, 9)),
]),
Param([
Name('y', (1, 11), prefix=' '),
]),
Operator(')', (1, 12)),
]),
Operator(':', (1, 13)),
ReturnStmt([
Keyword('return', (1, 15), prefix=' '),
PythonNode('arith_expr', [
Name('x', (1, 22), prefix=' '),
Operator('+', (1, 24), prefix=' '),
Name('y', (1, 26), prefix=' '),
]),
]),
])'''),
"def foo(x, y): return x + y",
),
( # Dump leaf
parse("def foo(x, y): return x + y").children[0].children[0],
"Keyword('def', (1, 0))",
'def',
),
( # Dump ErrorLeaf
ErrorLeaf('error_type', 'error_code', (1, 1), prefix=' '),
"ErrorLeaf('error_type', 'error_code', (1, 1), prefix=' ')",
' error_code',
),
( # Dump TypedLeaf
TypedLeaf('type', 'value', (1, 1)),
"TypedLeaf('type', 'value', (1, 1))",
'value',
),
]
)
def test_dump_parser_tree_not_top_level_module(node, expected_dump, expected_code):
dump_result = node.dump()
assert dump_result == expected_dump
# Check that dumped tree can be eval'd to recover the parser tree and original code.
recovered_code = eval(dump_result).get_code()
assert recovered_code == expected_code
def test_dump_parser_tree_invalid_args():
module = parse("lambda x, y: x + y")
with pytest.raises(TypeError):
module.dump(indent=1.1)
def test_eval_dump_recovers_parent():
module = parse("lambda x, y: x + y")
module2 = eval(module.dump())
assert module2.parent is None
lambda_node = module2.children[0]
assert lambda_node.parent is module2
assert module2.children[1].parent is module2
assert lambda_node.children[0].parent is lambda_node
param_node = lambda_node.children[1]
assert param_node.parent is lambda_node
assert param_node.children[0].parent is param_node
assert param_node.children[1].parent is param_node
arith_expr_node = lambda_node.children[-1]
assert arith_expr_node.parent is lambda_node
assert arith_expr_node.children[0].parent is arith_expr_node
|
