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