def test_recursive_formatter_format_empty():
"""Format an empty string."""
formatter = RecursiveFormatter()
assert formatter.format('', 'a', 'b', 'c') == ''
def test_recursive_formatter_format_no_expression():
"""Format a string sans formatting expression."""
formatter = RecursiveFormatter()
assert formatter.format('arb string', 'a', 'b', 'c') == 'arb string'
def test_recursive_formatter_format_none():
"""Format a None."""
formatter = RecursiveFormatter()
assert formatter.format(None, 'a', 'b', 'c') is None
def test_recursive_formatter_format_args_and_kwargs():
"""Format a string with positional args and kwargs."""
formatter = RecursiveFormatter()
assert (formatter.format('{} and {b} arb {c} string', 'a', b='b',
c='c') == 'a and b arb c string')
def test_recursive_formatter_format_kwargs():
"""Format a string with kwargs."""
formatter = RecursiveFormatter()
assert (formatter.format('{b} arb {c} string', a='a', b='b',
c='c') == 'b arb c string')
def test_recursive_formatter_format_args_no_index():
"""Format a string with positional args and auto index."""
formatter = RecursiveFormatter()
assert (formatter.format('{} arb {} string', 'a', 'b',
'c') == 'a arb b string')
def test_recursive_formatter_format_args():
"""Format a string with positional args."""
formatter = RecursiveFormatter()
assert (formatter.format('{0} arb {1} string', 'a', 'b',
'c') == 'a arb b string')