import math

def test_no_arguments():
    x = float()
    assert x == 0.0
    assert isinstance(x, float)

def test_integer_zero():
    x = float(0)
    assert x == 0.0

def test_integer_positive():
    x = float(42)
    assert x == 42.0

def test_integer_negative():
    x = float(-123)
    assert x == -123.0

def test_integer_large():
    x = float(999999999)
    assert x == 999999999.0

def test_float_identity():
    x = float(3.14159)
    assert x == 3.14159


def test_float_negative():
    x = float(-2.7)
    assert x == -2.7

def test_float_small():
    x = float(0.001)
    assert x == 0.001

def test_string_integer():
    x = float("42")
    assert x == 42.0

def test_string_negative_integer():
    x = float("-123")
    assert x == -123.0


def test_string_float():
    x = float("3.14159")
    assert x == 3.14159

def test_string_negative_float():
    x = float("-2.7")
    assert x == -2.7

def test_string_leading_decimal():
    x = float(".5")
    assert x == 0.5

def test_string_negative_leading_decimal():
    x = float("-.5")
    assert x == -0.5

def test_string_trailing_decimal():
    x = float("5.")
    assert x == 5.0

def test_string_negative_trailing_decimal():
    x = float("-5.")
    assert x == -5.0

def test_scientific_notation_basic():
    x = float("1e1")
    assert x == 10.0

def test_scientific_notation_negative_exp():
    x = float("1e-1")
    assert x == 0.1

def test_scientific_notation_decimal():
    x = float("1.5e2")
    assert x == 150.0

def test_scientific_notation_negative():
    x = float("-2.5e-3")
    assert x == -0.0025

def test_scientific_notation_uppercase():
    x = float("1E2")
    assert x == 100.0

def test_whitespace_spaces():
    x = float(" 42 ")
    assert x == 42.0

def test_whitespace_tabs_newlines():
    x = float("\t1.5\n")
    assert x == 1.5

def test_whitespace_mixed():
    x = float("  -3.14  ")
    assert x == -3.14

def test_positive_infinity():
    x = float("inf")
    assert math.isinf(x)
    assert x > 0

def test_positive_infinity_explicit():
    x = float("+inf")
    assert math.isinf(x)
    assert x > 0

def test_negative_infinity():
    x = float("-inf")
    assert math.isinf(x)
    assert x < 0

def test_infinity_long_form():
    x = float("Infinity")
    assert math.isinf(x)
    assert x > 0

def test_nan_lowercase():
    x = float("nan")
    assert math.isnan(x)

def test_nan_uppercase():
    x = float("NaN")
    assert math.isnan(x)

def test_boolean_true():
    x = float(True)
    assert x == 1.0

def test_boolean_false():
    x = float(False)
    assert x == 0.0

def test_zero_string():
    x = float("0")
    assert x == 0.0

def test_zero_decimal():
    x = float("0.0")
    assert x == 0.0

def test_zero_negative():
    x = float("-0")
    assert x == 0.0

def test_zero_negative_decimal():
    x = float("-0.0")
    assert x == 0.0

def test_zero_positive_explicit():
    x = float("+0")
    assert x == 0.0

def test_zero_scientific():
    x = float("0e0")
    assert x == 0.0

def test_mathematical_relationships():
    a = float(5)
    b = float(3)
    assert a > b
    assert float("-2.5") < float("2.5")
    assert float(0) == float("-0")

def test_arithmetic_operations():
    a = float(3)
    b = float(4)
    result = a + b
    assert result == 7.0

def test_multiplication():
    x = float("2.5")
    result = x * 2
    assert result == 5.0

def test_division():
    x = float(10)
    y = float(2)
    result = x / y
    assert result == 5.0


def test_in_expressions():
    result:float = float("10") + float("20")
    assert result == 30.0

# Main execution - all these should verify successfully
if __name__ == "__main__":
    test_no_arguments()
    test_integer_zero()
    test_integer_positive()
    test_integer_negative()
    test_integer_large()
    test_float_identity()
    test_float_negative()
    test_float_small()
    test_string_integer()
    test_string_negative_integer()
    test_string_float()
    test_string_negative_float()
    test_string_leading_decimal()
    test_string_negative_leading_decimal()
    test_string_trailing_decimal()
    test_string_negative_trailing_decimal()
    test_scientific_notation_basic()
    test_scientific_notation_negative_exp()
    test_scientific_notation_decimal()
    test_scientific_notation_negative()
    test_scientific_notation_uppercase()
    test_whitespace_spaces()
    test_whitespace_tabs_newlines()
    test_whitespace_mixed()
    test_positive_infinity()
    test_positive_infinity_explicit()
    test_negative_infinity()
    test_infinity_long_form()
    test_nan_lowercase()
    test_nan_uppercase()
    test_boolean_true()
    test_boolean_false()
    test_zero_string()
    test_zero_decimal()
    test_zero_negative()
    test_zero_negative_decimal()
    test_zero_positive_explicit()
    test_zero_scientific()
    test_mathematical_relationships()
    test_arithmetic_operations()
    test_multiplication()
    test_division()
    test_in_expressions()
    
    print("All success tests passed!")
