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Relax restrictions about backslashes in pep701 f-strings
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| import ast | ||
| import sys | ||
|
|
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| import pytest | ||
|
|
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| from python_minifier import unparse | ||
| from python_minifier.ast_compare import compare_ast | ||
|
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| @pytest.mark.parametrize('statement', [ | ||
| 'f"{1=!r:.4}"', | ||
| 'f"{1=:.4}"', | ||
| 'f"{1=!s:.4}"', | ||
| 'f"{1=:.4}"', | ||
| 'f"{1}"', | ||
| 'f"{1=}"', | ||
| 'f"{1=!s}"', | ||
| 'f"{1=!a}"' | ||
| ]) | ||
| def test_fstring_statement(statement): | ||
| if sys.version_info < (3, 8): | ||
| pytest.skip('f-string debug specifier added in python 3.8') | ||
|
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| assert unparse(ast.parse(statement)) == statement | ||
|
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| def test_pep0701(): | ||
| if sys.version_info < (3, 12): | ||
| pytest.skip('f-string syntax is bonkers before python 3.12') | ||
|
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| statement = 'f"{f"{f"{f"{"hello"}"}"}"}"' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = 'f"This is the playlist: {", ".join([])}"' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = 'f"{f"{f"{f"{f"{f"{1+1}"}"}"}"}"}"' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = """ | ||
| f"This is the playlist: {", ".join([ | ||
| 'Take me back to Eden', # My, my, those eyes like fire | ||
| 'Alkaline', # Not acid nor alkaline | ||
| 'Ascensionism' # Take to the broken skies at last | ||
| ])}" | ||
| """ | ||
| assert unparse(ast.parse(statement)) == 'f"This is the playlist: {", ".join(["Take me back to Eden","Alkaline","Ascensionism"])}"' | ||
|
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| statement = '''print(f"This is the playlist: {"\N{BLACK HEART SUIT}".join(songs)}")''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = '''f"Magic wand: {bag["wand"]}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = """ | ||
| f'''A complex trick: { | ||
| bag['bag'] # recursive bags! | ||
| }''' | ||
| """ | ||
| assert unparse(ast.parse(statement)) == 'f"A complex trick: {bag["bag"]}"' | ||
|
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||
| statement = '''f"These are the things: {", ".join(things)}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = '''f"{source.removesuffix(".py")}.c: $(srcdir)/{source}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = '''f"{f"{f"infinite"}"}"+' '+f"{f"nesting!!!"}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = '''f"{"\\n".join(a)}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
|
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| statement = '''f"{f"{f"{f"{f"{f"{1+1}"}"}"}"}"}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| statement = '''f"{"":*^{1:{1}}}"''' | ||
| assert unparse(ast.parse(statement)) == statement | ||
|
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| #statement = '''f"{"":*^{1:{1:{1}}}}"''' | ||
| #assert unparse(ast.parse(statement)) == statement | ||
| # SyntaxError: f-string: expressions nested too deeply | ||
|
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||
| statement = '''f"___{ | ||
| x | ||
| }___"''' | ||
| assert unparse(ast.parse(statement)) == '''f"___{x}___"''' | ||
|
|
||
| statement = '''f"___{( | ||
| x | ||
| )}___"''' | ||
| assert unparse(ast.parse(statement)) == '''f"___{x}___"''' | ||
|
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| def test_fstring_empty_str(): | ||
| if sys.version_info < (3, 6): | ||
| pytest.skip('f-string expressions not allowed in python < 3.6') | ||
|
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| source = r''' | ||
| f"""\ | ||
| {fg_br}""" | ||
| ''' | ||
|
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| print(source) | ||
| expected_ast = ast.parse(source) | ||
| actual_ast = unparse(expected_ast) | ||
| compare_ast(expected_ast, ast.parse(actual_ast)) |