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289 lines
11 KiB
Python
289 lines
11 KiB
Python
import re
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import sys
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import numpy as np
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import pytest
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from matplotlib import _preprocess_data
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from matplotlib.axes import Axes
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from matplotlib.testing import subprocess_run_for_testing
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from matplotlib.testing.decorators import check_figures_equal
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# Notes on testing the plotting functions itself
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# * the individual decorated plotting functions are tested in 'test_axes.py'
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# * that pyplot functions accept a data kwarg is only tested in
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# test_axes.test_pie_linewidth_0
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# this gets used in multiple tests, so define it here
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@_preprocess_data(replace_names=["x", "y"], label_namer="y")
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def plot_func(ax, x, y, ls="x", label=None, w="xyz"):
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return f"x: {list(x)}, y: {list(y)}, ls: {ls}, w: {w}, label: {label}"
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all_funcs = [plot_func]
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all_func_ids = ['plot_func']
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def test_compiletime_checks():
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"""Test decorator invocations -> no replacements."""
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def func(ax, x, y): pass
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def func_args(ax, x, y, *args): pass
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def func_kwargs(ax, x, y, **kwargs): pass
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def func_no_ax_args(*args, **kwargs): pass
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# this is ok
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_preprocess_data(replace_names=["x", "y"])(func)
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_preprocess_data(replace_names=["x", "y"])(func_kwargs)
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# this has "enough" information to do all the replaces
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_preprocess_data(replace_names=["x", "y"])(func_args)
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# no positional_parameter_names but needed due to replaces
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with pytest.raises(AssertionError):
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# z is unknown
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_preprocess_data(replace_names=["x", "y", "z"])(func_args)
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# no replacements at all -> all ok...
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_preprocess_data(replace_names=[], label_namer=None)(func)
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_preprocess_data(replace_names=[], label_namer=None)(func_args)
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_preprocess_data(replace_names=[], label_namer=None)(func_kwargs)
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_preprocess_data(replace_names=[], label_namer=None)(func_no_ax_args)
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# label namer is unknown
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with pytest.raises(AssertionError):
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_preprocess_data(label_namer="z")(func)
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with pytest.raises(AssertionError):
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_preprocess_data(label_namer="z")(func_args)
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@pytest.mark.parametrize('func', all_funcs, ids=all_func_ids)
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def test_function_call_without_data(func):
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"""Test without data -> no replacements."""
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assert (func(None, "x", "y") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: None")
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assert (func(None, x="x", y="y") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: None")
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assert (func(None, "x", "y", label="") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: ")
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assert (func(None, "x", "y", label="text") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: text")
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assert (func(None, x="x", y="y", label="") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: ")
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assert (func(None, x="x", y="y", label="text") ==
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"x: ['x'], y: ['y'], ls: x, w: xyz, label: text")
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@pytest.mark.parametrize('func', all_funcs, ids=all_func_ids)
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def test_function_call_with_dict_input(func):
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"""Tests with dict input, unpacking via preprocess_pipeline"""
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data = {'a': 1, 'b': 2}
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assert (func(None, data.keys(), data.values()) ==
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"x: ['a', 'b'], y: [1, 2], ls: x, w: xyz, label: None")
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@pytest.mark.parametrize('func', all_funcs, ids=all_func_ids)
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def test_function_call_with_dict_data(func):
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"""Test with dict data -> label comes from the value of 'x' parameter."""
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data = {"a": [1, 2], "b": [8, 9], "w": "NOT"}
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assert (func(None, "a", "b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func(None, x="a", y="b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func(None, "a", "b", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (func(None, "a", "b", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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assert (func(None, x="a", y="b", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (func(None, x="a", y="b", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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@pytest.mark.parametrize('func', all_funcs, ids=all_func_ids)
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def test_function_call_with_dict_data_not_in_data(func):
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"""Test the case that one var is not in data -> half replaces, half kept"""
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data = {"a": [1, 2], "w": "NOT"}
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assert (func(None, "a", "b", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: b")
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assert (func(None, x="a", y="b", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: b")
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assert (func(None, "a", "b", label="", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: ")
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assert (func(None, "a", "b", label="text", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: text")
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assert (func(None, x="a", y="b", label="", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: ")
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assert (func(None, x="a", y="b", label="text", data=data) ==
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"x: [1, 2], y: ['b'], ls: x, w: xyz, label: text")
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@pytest.mark.parametrize('func', all_funcs, ids=all_func_ids)
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def test_function_call_with_pandas_data(func, pd):
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"""Test with pandas dataframe -> label comes from ``data["col"].name``."""
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data = pd.DataFrame({"a": np.array([1, 2], dtype=np.int32),
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"b": np.array([8, 9], dtype=np.int32),
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"w": ["NOT", "NOT"]})
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assert (func(None, "a", "b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func(None, x="a", y="b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func(None, "a", "b", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (func(None, "a", "b", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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assert (func(None, x="a", y="b", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (func(None, x="a", y="b", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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def test_function_call_replace_all():
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"""Test without a "replace_names" argument, all vars should be replaced."""
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data = {"a": [1, 2], "b": [8, 9], "x": "xyz"}
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@_preprocess_data(label_namer="y")
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def func_replace_all(ax, x, y, ls="x", label=None, w="NOT"):
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return f"x: {list(x)}, y: {list(y)}, ls: {ls}, w: {w}, label: {label}"
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assert (func_replace_all(None, "a", "b", w="x", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func_replace_all(None, x="a", y="b", w="x", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: b")
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assert (func_replace_all(None, "a", "b", w="x", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (
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func_replace_all(None, "a", "b", w="x", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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assert (
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func_replace_all(None, x="a", y="b", w="x", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (
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func_replace_all(None, x="a", y="b", w="x", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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def test_no_label_replacements():
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"""Test with "label_namer=None" -> no label replacement at all."""
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@_preprocess_data(replace_names=["x", "y"], label_namer=None)
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def func_no_label(ax, x, y, ls="x", label=None, w="xyz"):
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return f"x: {list(x)}, y: {list(y)}, ls: {ls}, w: {w}, label: {label}"
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data = {"a": [1, 2], "b": [8, 9], "w": "NOT"}
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assert (func_no_label(None, "a", "b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: None")
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assert (func_no_label(None, x="a", y="b", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: None")
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assert (func_no_label(None, "a", "b", label="", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: ")
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assert (func_no_label(None, "a", "b", label="text", data=data) ==
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"x: [1, 2], y: [8, 9], ls: x, w: xyz, label: text")
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def test_more_args_than_pos_parameter():
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@_preprocess_data(replace_names=["x", "y"], label_namer="y")
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def func(ax, x, y, z=1):
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pass
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data = {"a": [1, 2], "b": [8, 9], "w": "NOT"}
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with pytest.raises(TypeError):
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func(None, "a", "b", "z", "z", data=data)
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def test_docstring_addition():
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@_preprocess_data()
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def funcy(ax, *args, **kwargs):
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"""
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Parameters
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----------
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data : indexable object, optional
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DATA_PARAMETER_PLACEHOLDER
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"""
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assert re.search(r"all parameters also accept a string", funcy.__doc__)
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assert not re.search(r"the following parameters", funcy.__doc__)
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@_preprocess_data(replace_names=[])
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def funcy(ax, x, y, z, bar=None):
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"""
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Parameters
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----------
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data : indexable object, optional
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DATA_PARAMETER_PLACEHOLDER
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"""
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assert not re.search(r"all parameters also accept a string", funcy.__doc__)
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assert not re.search(r"the following parameters", funcy.__doc__)
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@_preprocess_data(replace_names=["bar"])
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def funcy(ax, x, y, z, bar=None):
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"""
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Parameters
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----------
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data : indexable object, optional
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DATA_PARAMETER_PLACEHOLDER
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"""
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assert not re.search(r"all parameters also accept a string", funcy.__doc__)
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assert not re.search(r"the following parameters .*: \*bar\*\.",
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funcy.__doc__)
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@_preprocess_data(replace_names=["x", "t"])
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def funcy(ax, x, y, z, t=None):
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"""
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Parameters
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----------
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data : indexable object, optional
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DATA_PARAMETER_PLACEHOLDER
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"""
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assert not re.search(r"all parameters also accept a string", funcy.__doc__)
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assert not re.search(r"the following parameters .*: \*x\*, \*t\*\.",
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funcy.__doc__)
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def test_data_parameter_replacement():
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"""
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Test that the docstring contains the correct *data* parameter stub
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for all methods that we run _preprocess_data() on.
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"""
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program = (
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"import logging; "
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"logging.basicConfig(level=logging.DEBUG); "
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"import matplotlib.pyplot as plt"
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)
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cmd = [sys.executable, "-c", program]
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completed_proc = subprocess_run_for_testing(
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cmd, text=True, capture_output=True
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)
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assert 'data parameter docstring error' not in completed_proc.stderr
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class TestPlotTypes:
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plotters = [Axes.scatter, Axes.bar, Axes.plot]
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@pytest.mark.parametrize('plotter', plotters)
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@check_figures_equal(extensions=['png'])
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def test_dict_unpack(self, plotter, fig_test, fig_ref):
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x = [1, 2, 3]
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y = [4, 5, 6]
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ddict = dict(zip(x, y))
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plotter(fig_test.subplots(),
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ddict.keys(), ddict.values())
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plotter(fig_ref.subplots(), x, y)
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@pytest.mark.parametrize('plotter', plotters)
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@check_figures_equal(extensions=['png'])
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def test_data_kwarg(self, plotter, fig_test, fig_ref):
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x = [1, 2, 3]
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y = [4, 5, 6]
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plotter(fig_test.subplots(), 'xval', 'yval',
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data={'xval': x, 'yval': y})
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plotter(fig_ref.subplots(), x, y)
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