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"""Tests for the token-based transformers in IPython.core.inputtransformer2
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Line-based transformers are the simpler ones; token-based transformers are
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more complex. See test_inputtransformer2_line for tests for line-based
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transformations.
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"""
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import string
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import sys
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from textwrap import dedent
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import pytest
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from IPython.core import inputtransformer2 as ipt2
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from IPython.core.inputtransformer2 import _find_assign_op, make_tokens_by_line
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MULTILINE_MAGIC = ("""\
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a = f()
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%foo \\
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bar
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g()
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""".splitlines(keepends=True), (2, 0), """\
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a = f()
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get_ipython().run_line_magic('foo', ' bar')
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g()
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""".splitlines(keepends=True))
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INDENTED_MAGIC = ("""\
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for a in range(5):
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%ls
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""".splitlines(keepends=True), (2, 4), """\
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for a in range(5):
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get_ipython().run_line_magic('ls', '')
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""".splitlines(keepends=True))
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CRLF_MAGIC = ([
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"a = f()\n",
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"%ls\r\n",
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"g()\n"
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], (2, 0), [
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"a = f()\n",
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"get_ipython().run_line_magic('ls', '')\n",
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"g()\n"
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])
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MULTILINE_MAGIC_ASSIGN = ("""\
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a = f()
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b = %foo \\
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bar
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g()
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""".splitlines(keepends=True), (2, 4), """\
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a = f()
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b = get_ipython().run_line_magic('foo', ' bar')
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g()
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""".splitlines(keepends=True))
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MULTILINE_SYSTEM_ASSIGN = ("""\
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a = f()
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b = !foo \\
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bar
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g()
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""".splitlines(keepends=True), (2, 4), """\
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a = f()
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b = get_ipython().getoutput('foo bar')
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g()
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""".splitlines(keepends=True))
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#####
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MULTILINE_SYSTEM_ASSIGN_AFTER_DEDENT = ("""\
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def test():
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for i in range(1):
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print(i)
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res =! ls
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""".splitlines(keepends=True), (4, 7), '''\
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def test():
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for i in range(1):
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print(i)
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res =get_ipython().getoutput(\' ls\')
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'''.splitlines(keepends=True))
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######
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AUTOCALL_QUOTE = (
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[",f 1 2 3\n"], (1, 0),
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['f("1", "2", "3")\n']
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)
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AUTOCALL_QUOTE2 = (
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[";f 1 2 3\n"], (1, 0),
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['f("1 2 3")\n']
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)
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AUTOCALL_PAREN = (
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["/f 1 2 3\n"], (1, 0),
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['f(1, 2, 3)\n']
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)
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SIMPLE_HELP = (
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["foo?\n"], (1, 0),
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["get_ipython().run_line_magic('pinfo', 'foo')\n"]
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)
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DETAILED_HELP = (
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["foo??\n"], (1, 0),
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["get_ipython().run_line_magic('pinfo2', 'foo')\n"]
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)
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MAGIC_HELP = (
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["%foo?\n"], (1, 0),
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["get_ipython().run_line_magic('pinfo', '%foo')\n"]
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)
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HELP_IN_EXPR = (
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["a = b + c?\n"], (1, 0),
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["get_ipython().set_next_input('a = b + c');"
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"get_ipython().run_line_magic('pinfo', 'c')\n"]
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)
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HELP_CONTINUED_LINE = ("""\
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a = \\
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zip?
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""".splitlines(keepends=True), (1, 0),
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[r"get_ipython().set_next_input('a = \\\nzip');get_ipython().run_line_magic('pinfo', 'zip')" + "\n"]
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)
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HELP_MULTILINE = ("""\
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(a,
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b) = zip?
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""".splitlines(keepends=True), (1, 0),
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[r"get_ipython().set_next_input('(a,\nb) = zip');get_ipython().run_line_magic('pinfo', 'zip')" + "\n"]
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)
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HELP_UNICODE = (
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["Ï€.foo?\n"], (1, 0),
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["get_ipython().run_line_magic('pinfo', 'Ï€.foo')\n"]
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)
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def null_cleanup_transformer(lines):
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"""
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A cleanup transform that returns an empty list.
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"""
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return []
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def test_check_make_token_by_line_never_ends_empty():
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"""
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Check that not sequence of single or double characters ends up leading to en empty list of tokens
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"""
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from string import printable
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for c in printable:
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assert make_tokens_by_line(c)[-1] != []
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for k in printable:
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assert make_tokens_by_line(c + k)[-1] != []
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def check_find(transformer, case, match=True):
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sample, expected_start, _ = case
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tbl = make_tokens_by_line(sample)
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res = transformer.find(tbl)
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if match:
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# start_line is stored 0-indexed, expected values are 1-indexed
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assert (res.start_line + 1, res.start_col) == expected_start
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return res
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else:
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assert res is None
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def check_transform(transformer_cls, case):
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lines, start, expected = case
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transformer = transformer_cls(start)
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assert transformer.transform(lines) == expected
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def test_continued_line():
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lines = MULTILINE_MAGIC_ASSIGN[0]
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assert ipt2.find_end_of_continued_line(lines, 1) == 2
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assert ipt2.assemble_continued_line(lines, (1, 5), 2) == "foo bar"
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def test_find_assign_magic():
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check_find(ipt2.MagicAssign, MULTILINE_MAGIC_ASSIGN)
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check_find(ipt2.MagicAssign, MULTILINE_SYSTEM_ASSIGN, match=False)
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check_find(ipt2.MagicAssign, MULTILINE_SYSTEM_ASSIGN_AFTER_DEDENT, match=False)
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def test_transform_assign_magic():
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check_transform(ipt2.MagicAssign, MULTILINE_MAGIC_ASSIGN)
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def test_find_assign_system():
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check_find(ipt2.SystemAssign, MULTILINE_SYSTEM_ASSIGN)
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check_find(ipt2.SystemAssign, MULTILINE_SYSTEM_ASSIGN_AFTER_DEDENT)
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check_find(ipt2.SystemAssign, (["a = !ls\n"], (1, 5), None))
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check_find(ipt2.SystemAssign, (["a=!ls\n"], (1, 2), None))
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check_find(ipt2.SystemAssign, MULTILINE_MAGIC_ASSIGN, match=False)
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def test_transform_assign_system():
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check_transform(ipt2.SystemAssign, MULTILINE_SYSTEM_ASSIGN)
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check_transform(ipt2.SystemAssign, MULTILINE_SYSTEM_ASSIGN_AFTER_DEDENT)
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def test_find_magic_escape():
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check_find(ipt2.EscapedCommand, MULTILINE_MAGIC)
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check_find(ipt2.EscapedCommand, INDENTED_MAGIC)
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check_find(ipt2.EscapedCommand, MULTILINE_MAGIC_ASSIGN, match=False)
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def test_transform_magic_escape():
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check_transform(ipt2.EscapedCommand, MULTILINE_MAGIC)
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check_transform(ipt2.EscapedCommand, INDENTED_MAGIC)
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check_transform(ipt2.EscapedCommand, CRLF_MAGIC)
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def test_find_autocalls():
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for case in [AUTOCALL_QUOTE, AUTOCALL_QUOTE2, AUTOCALL_PAREN]:
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print("Testing %r" % case[0])
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check_find(ipt2.EscapedCommand, case)
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def test_transform_autocall():
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for case in [AUTOCALL_QUOTE, AUTOCALL_QUOTE2, AUTOCALL_PAREN]:
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print("Testing %r" % case[0])
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check_transform(ipt2.EscapedCommand, case)
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def test_find_help():
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for case in [SIMPLE_HELP, DETAILED_HELP, MAGIC_HELP, HELP_IN_EXPR]:
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check_find(ipt2.HelpEnd, case)
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tf = check_find(ipt2.HelpEnd, HELP_CONTINUED_LINE)
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assert tf.q_line == 1
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assert tf.q_col == 3
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tf = check_find(ipt2.HelpEnd, HELP_MULTILINE)
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assert tf.q_line == 1
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assert tf.q_col == 8
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# ? in a comment does not trigger help
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check_find(ipt2.HelpEnd, (["foo # bar?\n"], None, None), match=False)
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# Nor in a string
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check_find(ipt2.HelpEnd, (["foo = '''bar?\n"], None, None), match=False)
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def test_transform_help():
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tf = ipt2.HelpEnd((1, 0), (1, 9))
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assert tf.transform(HELP_IN_EXPR[0]) == HELP_IN_EXPR[2]
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tf = ipt2.HelpEnd((1, 0), (2, 3))
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assert tf.transform(HELP_CONTINUED_LINE[0]) == HELP_CONTINUED_LINE[2]
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tf = ipt2.HelpEnd((1, 0), (2, 8))
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assert tf.transform(HELP_MULTILINE[0]) == HELP_MULTILINE[2]
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tf = ipt2.HelpEnd((1, 0), (1, 0))
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assert tf.transform(HELP_UNICODE[0]) == HELP_UNICODE[2]
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def test_find_assign_op_dedent():
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"""
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be careful that empty token like dedent are not counted as parens
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"""
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class Tk:
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def __init__(self, s):
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self.string = s
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assert _find_assign_op([Tk(s) for s in ("", "a", "=", "b")]) == 2
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assert (
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_find_assign_op([Tk(s) for s in ("", "(", "a", "=", "b", ")", "=", "5")]) == 6
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)
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examples = [
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pytest.param("a = 1", "complete", None),
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pytest.param("for a in range(5):", "incomplete", 4),
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pytest.param("for a in range(5):\n if a > 0:", "incomplete", 8),
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pytest.param("raise = 2", "invalid", None),
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pytest.param("a = [1,\n2,", "incomplete", 0),
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pytest.param("(\n))", "incomplete", 0),
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pytest.param("\\\r\n", "incomplete", 0),
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pytest.param("a = '''\n hi", "incomplete", 3),
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pytest.param("def a():\n x=1\n global x", "invalid", None),
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pytest.param(
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"a \\ ",
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"invalid",
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None,
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marks=pytest.mark.xfail(
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reason="Bug in python 3.9.8 – bpo 45738",
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condition=sys.version_info
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in [(3, 9, 8, "final", 0), (3, 11, 0, "alpha", 2)],
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raises=SystemError,
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strict=True,
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),
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), # Nothing allowed after backslash,
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pytest.param("1\\\n+2", "complete", None),
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]
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@pytest.mark.parametrize("code, expected, number", examples)
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def test_check_complete_param(code, expected, number):
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cc = ipt2.TransformerManager().check_complete
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assert cc(code) == (expected, number)
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@pytest.mark.xfail(
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reason="Bug in python 3.9.8 – bpo 45738",
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condition=sys.version_info in [(3, 9, 8, "final", 0), (3, 11, 0, "alpha", 2)],
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raises=SystemError,
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strict=True,
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)
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def test_check_complete():
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cc = ipt2.TransformerManager().check_complete
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example = dedent("""
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if True:
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a=1""" )
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assert cc(example) == ("incomplete", 4)
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assert cc(example + "\n") == ("complete", None)
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assert cc(example + "\n ") == ("complete", None)
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# no need to loop on all the letters/numbers.
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short = '12abAB'+string.printable[62:]
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for c in short:
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# test does not raise:
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cc(c)
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for k in short:
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cc(c+k)
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assert cc("def f():\n x=0\n \\\n ") == ("incomplete", 2)
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def test_check_complete_II():
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"""
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Test that multiple line strings are properly handled.
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Separate test function for convenience
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"""
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cc = ipt2.TransformerManager().check_complete
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assert cc('''def foo():\n """''') == ("incomplete", 4)
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def test_check_complete_invalidates_sunken_brackets():
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"""
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Test that a single line with more closing brackets than the opening ones is
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interpreted as invalid
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"""
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cc = ipt2.TransformerManager().check_complete
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assert cc(")") == ("invalid", None)
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assert cc("]") == ("invalid", None)
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assert cc("}") == ("invalid", None)
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assert cc(")(") == ("invalid", None)
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assert cc("][") == ("invalid", None)
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assert cc("}{") == ("invalid", None)
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assert cc("]()(") == ("invalid", None)
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assert cc("())(") == ("invalid", None)
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assert cc(")[](") == ("invalid", None)
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assert cc("()](") == ("invalid", None)
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def test_null_cleanup_transformer():
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manager = ipt2.TransformerManager()
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manager.cleanup_transforms.insert(0, null_cleanup_transformer)
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assert manager.transform_cell("") == ""
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def test_side_effects_I():
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count = 0
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def counter(lines):
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nonlocal count
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count += 1
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return lines
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counter.has_side_effects = True
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manager = ipt2.TransformerManager()
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manager.cleanup_transforms.insert(0, counter)
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assert manager.check_complete("a=1\n") == ('complete', None)
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assert count == 0
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def test_side_effects_II():
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count = 0
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def counter(lines):
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nonlocal count
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count += 1
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return lines
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counter.has_side_effects = True
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manager = ipt2.TransformerManager()
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manager.line_transforms.insert(0, counter)
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assert manager.check_complete("b=1\n") == ('complete', None)
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assert count == 0
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