def test_canvas_rejects_loop_with_repeated_numbers():
dwg = svgwrite.Drawing("foo")
canvas = Canvas(dwg)
loop = Loop('acgu', [1, 2, 3, 4], None)
loop2 = Loop('acgu', [1, 2, 3, 4], None)
with pytest.raises(Exception) as e_info:
canvas.add_loop(loop)
canvas.add_loop(loop2)
def test_sane_loop_order():
# this stem is an impossibility of numbering -- just so that we can add to a canvas.
stem = Stem('acguacgu', [[1, 8], [2, 7], [3, 6], [4, 5]])
loop = Loop('acgu', [1, 2, 3, 4], stem)
for loop_idx, loop_nt in enumerate(loop.nucleotides.keys()):
print loop_idx, loop_nt, loop.nucleotides[loop_nt].name
dwg = svgwrite.Drawing("foo")
canvas = Canvas(dwg)
canvas.add_stem(stem)
canvas.add_loop(loop)
for loop_idx, loop_nt in enumerate(canvas.loops[0].nucleotides.keys()):
print loop_idx, loop_nt, loop.nucleotides[loop_nt].name
