Fermat MCP

import matplotlib matplotlib.use("Agg") from fastmcp.utilities.types import Image as FastImage from fmcp.mpl_mcp.core.stem_chart import plot_stem def test_stem_vertical_and_horizontal(): x = [0.0, 1.0, 2.0] y = [1.0, 3.0, 2.0] img_v = plot_stem(x, y, orientation="vertical", figsize=[5, 4]) assert isinstance(img_v, FastImage) assert img_v.data is not None, "img_v.data is None" assert img_v.data[:8] == b"\x89PNG\r\n\x1a\n" img_h = plot_stem(x, y, orientation="horizontal", figsize=[5, 4]) assert isinstance(img_h, FastImage) assert img_h.data is not None, "img_h.data is None" assert img_h.data[:8] == b"\x89PNG\r\n\x1a\n"