def test_sigma_iterative(capsys, src, output):
src = sigma_while_src + '\n' + src
source_file = io.StringIO(src)
subpascal.run(source_file)
captured = capsys.readouterr()
assert '' == captured.err
assert output == captured.out
def test_run_unexpected_close_paren_example(capsys):
source_file = io.StringIO('(+ 18 35))')
run(source_file)
captured = capsys.readouterr()
assert '' == captured.out
assert "*** Unexpected close parenthesis.\n" == captured.err
def test_run_single_line(capsys):
source_file = io.StringIO('(print 123)')
run(source_file)
captured = capsys.readouterr()
assert '123\n' == captured.out
def test_run_undefined_func_example(capsys):
source_file = io.StringIO('(spam 18 35)')
run(source_file)
captured = capsys.readouterr()
assert '' == captured.out
assert "*** Undefined function: 'spam'.\n" == captured.err
def test_run_gcd_example(capsys):
source_file = io.StringIO(GCD_EXAMPLE)
run(source_file)
captured = capsys.readouterr()
assert '1\n' == captured.out
def test_run_doubling_example(capsys):
source_file = io.StringIO(DOUBLING_EXAMPLE)
run(source_file)
captured = capsys.readouterr()
assert '1\n2\n4\n8\n16\n32\n64\n128\n256\n' == captured.out
def test_run_multiple_lines(capsys):
source_file = io.StringIO('(print 123)\n(print 456)')
run(source_file)
captured = capsys.readouterr()
assert '123\n456\n' == captured.out
