def test_read_simple():
# Expects expressions to be read correctly
assert read("(+ 1 2)") == ["+", "1", "2"]
def test_read_nested():
# Expects nested expressions to be read as nested lists
assert read("(+ (* 2 3) 1)") == ["+", ["*", "2", "3"], "1"]
def test_read_nolist():
# Expects an error if there are no lists on the user input and if it's not a single value
with raises(SyntaxError):
read("++++++")
def test_read_bad_parenthesis():
# Expects an error if the expression contains parentheses that do not match up
with raises(SyntaxError):
read("(+ 1 (2)")
def test_read_bad_exp():
# Expects the user input to be a list(i.e with parenthesis on both sides).
with raises(SyntaxError):
read("+ 1 2")
def test_read_number():
# Expects single values to be accepted without parenthesis
assert read("1") == ["1"]
def test_read_proc():
# Expects single values to be accepted without parenthesis
assert read("+") == ["+"]