from datetime import datetime

import gc

import inspect

import io

import warnings

import numpy as np

from numpy.testing import assert_almost_equal

from packaging.version import parse as parse_version

import pyparsing

import pytest

import matplotlib as mpl

from matplotlib.backend_bases import MouseEvent

from matplotlib.backends.backend_agg import RendererAgg

from matplotlib.figure import Figure

from matplotlib.font_manager import FontProperties

import matplotlib.patches as mpatches

import matplotlib.pyplot as plt

from matplotlib.gridspec import GridSpec

import matplotlib.transforms as mtransforms

from matplotlib.testing.decorators import check_figures_equal, image_comparison

from matplotlib.testing._markers import needs_usetex

from matplotlib.text import Text, Annotation, OffsetFrom

pyparsing_version = parse_version(pyparsing.__version__)

@image_comparison(['font_styles'])

def test_font_styles():

def find_matplotlib_font(**kw):

prop = FontProperties(**kw)

path = findfont(prop, directory=mpl.get_data_path())

return FontProperties(fname=path)

from matplotlib.font_manager import FontProperties, findfont

warnings.filterwarnings(

'ignore',

r"findfont: Font family \[u?'Foo'\] not found. Falling back to .",

UserWarning,

module='matplotlib.font_manager')

fig, ax = plt.subplots()

normal_font = find_matplotlib_font(

family="sans-serif",

style="normal",

variant="normal",

size=14)

a = ax.annotate(

"Normal Font",

(0.1, 0.1),

xycoords='axes fraction',

fontproperties=normal_font)

assert a.get_fontname() == 'DejaVu Sans'

assert a.get_fontstyle() == 'normal'

assert a.get_fontvariant() == 'normal'

assert a.get_weight() == 'normal'

assert a.get_stretch() == 'normal'

bold_font = find_matplotlib_font(

family="Foo",

style="normal",

variant="normal",

weight="bold",

stretch=500,

size=14)

ax.annotate(

"Bold Font",

(0.1, 0.2),

xycoords='axes fraction',

fontproperties=bold_font)

bold_italic_font = find_matplotlib_font(

family="sans serif",

style="italic",

variant="normal",

weight=750,

stretch=500,

size=14)

ax.annotate(

"Bold Italic Font",

(0.1, 0.3),

xycoords='axes fraction',

fontproperties=bold_italic_font)

light_font = find_matplotlib_font(

family="sans-serif",

style="normal",

variant="normal",

weight=200,

stretch=500,

size=14)

ax.annotate(

"Light Font",

(0.1, 0.4),

xycoords='axes fraction',

fontproperties=light_font)

condensed_font = find_matplotlib_font(

family="sans-serif",

style="normal",

variant="normal",

weight=500,

stretch=100,

size=14)

ax.annotate(

"Condensed Font",

(0.1, 0.5),

xycoords='axes fraction',

fontproperties=condensed_font)

ax.set_xticks([])

ax.set_yticks([])

@image_comparison(['multiline'])

def test_multiline():

plt.figure()

ax = plt.subplot(1, 1, 1)

ax.set_title("multiline\ntext alignment")

plt.text(

0.2, 0.5, "TpTpTp\n$M$\nTpTpTp", size=20, ha="center", va="top")

plt.text(

0.5, 0.5, "TpTpTp\n$M^{M^{M^{M}}}$\nTpTpTp", size=20,

ha="center", va="top")

plt.text(

0.8, 0.5, "TpTpTp\n$M_{q_{q_{q}}}$\nTpTpTp", size=20,

ha="center", va="top")

plt.xlim(0, 1)

plt.ylim(0, 0.8)

ax.set_xticks([])

ax.set_yticks([])

# TODO: tighten tolerance after baseline image is regenerated for text overhaul

@image_comparison(['multiline2'], style='mpl20', tol=0.05)

def test_multiline2():

# Remove this line when this test image is regenerated.

plt.rcParams['text.kerning_factor'] = 6

fig, ax = plt.subplots()

ax.set_xlim(0, 1.4)

ax.set_ylim(0, 2)

ax.axhline(0.5, color='C2', linewidth=0.3)

sts = ['Line', '2 Lineg\n 2 Lg', '$\\sum_i x $', 'hi $\\sum_i x $\ntest',

'test\n $\\sum_i x $', '$\\sum_i x $\n $\\sum_i x $']

renderer = fig.canvas.get_renderer()

def draw_box(ax, tt):

r = mpatches.Rectangle((0, 0), 1, 1, clip_on=False,

transform=ax.transAxes)

r.set_bounds(

tt.get_window_extent(renderer)

.transformed(ax.transAxes.inverted())

.bounds)

ax.add_patch(r)

horal = 'left'

for nn, st in enumerate(sts):

tt = ax.text(0.2 * nn + 0.1, 0.5, st, horizontalalignment=horal,

verticalalignment='bottom')

draw_box(ax, tt)

ax.text(1.2, 0.5, 'Bottom align', color='C2')

ax.axhline(1.3, color='C2', linewidth=0.3)

for nn, st in enumerate(sts):

tt = ax.text(0.2 * nn + 0.1, 1.3, st, horizontalalignment=horal,

verticalalignment='top')

draw_box(ax, tt)

ax.text(1.2, 1.3, 'Top align', color='C2')

ax.axhline(1.8, color='C2', linewidth=0.3)

for nn, st in enumerate(sts):

tt = ax.text(0.2 * nn + 0.1, 1.8, st, horizontalalignment=horal,

verticalalignment='baseline')

draw_box(ax, tt)

ax.text(1.2, 1.8, 'Baseline align', color='C2')

ax.axhline(0.1, color='C2', linewidth=0.3)

for nn, st in enumerate(sts):

tt = ax.text(0.2 * nn + 0.1, 0.1, st, horizontalalignment=horal,

verticalalignment='bottom', rotation=20)

draw_box(ax, tt)

ax.text(1.2, 0.1, 'Bot align, rot20', color='C2')

@image_comparison(['antialiased.png'], style='mpl20')

def test_antialiasing():

mpl.rcParams['text.antialiased'] = False # Passed arguments should override.

fig = plt.figure(figsize=(5.25, 0.75))

fig.text(0.3, 0.75, "antialiased", horizontalalignment='center',

verticalalignment='center', antialiased=True)

fig.text(0.3, 0.25, r"$\sqrt{x}$", horizontalalignment='center',

verticalalignment='center', antialiased=True)

mpl.rcParams['text.antialiased'] = True # Passed arguments should override.

fig.text(0.7, 0.75, "not antialiased", horizontalalignment='center',

verticalalignment='center', antialiased=False)

fig.text(0.7, 0.25, r"$\sqrt{x}$", horizontalalignment='center',

verticalalignment='center', antialiased=False)

mpl.rcParams['text.antialiased'] = False # Should not affect existing text.

# TODO: tighten tolerance after baseline image is regenerated for text overhaul

@image_comparison(['text_contains.png'], tol=0.05)

def test_contains():

fig = plt.figure()

ax = plt.axes()

mevent = MouseEvent('button_press_event', fig.canvas, 0.5, 0.5, 1, None)

xs = np.linspace(0.25, 0.75, 30)

ys = np.linspace(0.25, 0.75, 30)

xs, ys = np.meshgrid(xs, ys)

txt = plt.text(

0.5, 0.4, 'hello world', ha='center', fontsize=30, rotation=30)

# uncomment to draw the text's bounding box

# txt.set_bbox(dict(edgecolor='black', facecolor='none'))

# draw the text. This is important, as the contains method can only work

# when a renderer exists.

fig.canvas.draw()

for x, y in zip(xs.flat, ys.flat):

mevent.x, mevent.y = plt.gca().transAxes.transform([x, y])

contains, _ = txt.contains(mevent)

color = 'yellow' if contains else 'red'

# capture the viewLim, plot a point, and reset the viewLim

vl = ax.viewLim.frozen()

ax.plot(x, y, 'o', color=color)

ax.viewLim.set(vl)

def test_annotation_contains():

# Check that Annotation.contains looks at the bboxes of the text and the

# arrow separately, not at the joint bbox.

fig, ax = plt.subplots()

ann = ax.annotate(

"hello", xy=(.4, .4), xytext=(.6, .6), arrowprops={"arrowstyle": "->"})

fig.canvas.draw() # Needed for the same reason as in test_contains.

event = MouseEvent(

"button_press_event", fig.canvas, *ax.transData.transform((.5, .6)))

assert ann.contains(event) == (False, {})

@pytest.mark.parametrize('err, xycoords, match', (

(TypeError, print, "xycoords callable must return a BboxBase or Transform, not a"),

(TypeError, [0, 0], r"'xycoords' must be an instance of str, tuple"),

(ValueError, "foo", "'foo' is not a valid coordinate"),

(ValueError, "foo bar", "'foo bar' is not a valid coordinate"),

(ValueError, "offset foo", "xycoords cannot be an offset coordinate"),

(ValueError, "axes foo", "'foo' is not a recognized unit"),

))

def test_annotate_errors(err, xycoords, match):

fig, ax = plt.subplots()

with pytest.raises(err, match=match):

ax.annotate('xy', (0, 0), xytext=(0.5, 0.5), xycoords=xycoords)

fig.canvas.draw()

@image_comparison(['titles'])

def test_titles():

# left and right side titles

plt.figure()

ax = plt.subplot(1, 1, 1)

ax.set_title("left title", loc="left")

ax.set_title("right title", loc="right")

ax.set_xticks([])

ax.set_yticks([])

# TODO: tighten tolerance after baseline image is regenerated for text overhaul

@image_comparison(['text_alignment'], style='mpl20', tol=0.08)

def test_alignment():

plt.figure()

ax = plt.subplot(1, 1, 1)

x = 0.1

for rotation in (0, 30):

for alignment in ('top', 'bottom', 'baseline', 'center'):

ax.text(

x, 0.5, alignment + " Tj", va=alignment, rotation=rotation,

bbox=dict(boxstyle='round', facecolor='wheat', alpha=0.5))

ax.text(

x, 1.0, r'$\sum_{i=0}^{j}$', va=alignment, rotation=rotation)

x += 0.1

ax.plot([0, 1], [0.5, 0.5])

ax.plot([0, 1], [1.0, 1.0])

ax.set_xlim(0, 1)

ax.set_ylim(0, 1.5)

ax.set_xticks([])

ax.set_yticks([])

@image_comparison(['axes_titles.png'])

def test_axes_titles():

# Related to issue #3327

plt.figure()

ax = plt.subplot(1, 1, 1)

ax.set_title('center', loc='center', fontsize=20, fontweight=700)

ax.set_title('left', loc='left', fontsize=12, fontweight=400)

ax.set_title('right', loc='right', fontsize=12, fontweight=400)

def test_set_position():

fig, ax = plt.subplots()

# test set_position

ann = ax.annotate(

'test', (0, 0), xytext=(0, 0), textcoords='figure pixels')

fig.canvas.draw()

init_pos = ann.get_window_extent(fig.canvas.renderer)

shift_val = 15

ann.set_position((shift_val, shift_val))

fig.canvas.draw()

post_pos = ann.get_window_extent(fig.canvas.renderer)

for a, b in zip(init_pos.min, post_pos.min):

assert a + shift_val == b

# test xyann

ann = ax.annotate(

'test', (0, 0), xytext=(0, 0), textcoords='figure pixels')

fig.canvas.draw()

init_pos = ann.get_window_extent(fig.canvas.renderer)

shift_val = 15

ann.xyann = (shift_val, shift_val)

fig.canvas.draw()

post_pos = ann.get_window_extent(fig.canvas.renderer)

for a, b in zip(init_pos.min, post_pos.min):

assert a + shift_val == b

def test_char_index_at():

fig = plt.figure()

text = fig.text(0.1, 0.9, "")

text.set_text("i")

bbox = text.get_window_extent()

size_i = bbox.x1 - bbox.x0

text.set_text("m")

bbox = text.get_window_extent()

size_m = bbox.x1 - bbox.x0

text.set_text("iiiimmmm")

bbox = text.get_window_extent()

origin = bbox.x0

assert text._char_index_at(origin - size_i) == 0 # left of first char

assert text._char_index_at(origin) == 0

assert text._char_index_at(origin + 0.499*size_i) == 0

assert text._char_index_at(origin + 0.501*size_i) == 1

assert text._char_index_at(origin + size_i*3) == 3

assert text._char_index_at(origin + size_i*4 + size_m*3) == 7

assert text._char_index_at(origin + size_i*4 + size_m*4) == 8

assert text._char_index_at(origin + size_i*4 + size_m*10) == 8

@pytest.mark.parametrize('text', ['', 'O'], ids=['empty', 'non-empty'])

def test_non_default_dpi(text):

fig, ax = plt.subplots()

t1 = ax.text(0.5, 0.5, text, ha='left', va='bottom')

fig.canvas.draw()

dpi = fig.dpi

bbox1 = t1.get_window_extent()

bbox2 = t1.get_window_extent(dpi=dpi * 10)

np.testing.assert_allclose(bbox2.get_points(), bbox1.get_points() * 10,

rtol=5e-2)

# Text.get_window_extent should not permanently change dpi.

assert fig.dpi == dpi

def test_get_rotation_string():

assert Text(rotation='horizontal').get_rotation() == 0.

assert Text(rotation='vertical').get_rotation() == 90.

def test_get_rotation_float():

for i in [15., 16.70, 77.4]:

assert Text(rotation=i).get_rotation() == i

def test_get_rotation_int():

for i in [67, 16, 41]:

assert Text(rotation=i).get_rotation() == float(i)

def test_get_rotation_raises():

with pytest.raises(ValueError):

Text(rotation='hozirontal')

def test_get_rotation_none():

assert Text(rotation=None).get_rotation() == 0.0

def test_get_rotation_mod360():

for i, j in zip([360., 377., 720+177.2], [0., 17., 177.2]):

assert_almost_equal(Text(rotation=i).get_rotation(), j)

@pytest.mark.parametrize("ha", ["center", "right", "left"])

@pytest.mark.parametrize("va", ["center", "top", "bottom",

"baseline", "center_baseline"])

def test_null_rotation_with_rotation_mode(ha, va):

fig, ax = plt.subplots()

kw = dict(rotation=0, va=va, ha=ha)

t0 = ax.text(.5, .5, 'test', rotation_mode='anchor', **kw)

t1 = ax.text(.5, .5, 'test', rotation_mode='default', **kw)

fig.canvas.draw()

assert_almost_equal(t0.get_window_extent(fig.canvas.renderer).get_points(),

t1.get_window_extent(fig.canvas.renderer).get_points())

@image_comparison(['text_bboxclip'])

def test_bbox_clipping():

plt.text(0.9, 0.2, 'Is bbox clipped?', backgroundcolor='r', clip_on=True)

t = plt.text(0.9, 0.5, 'Is fancy bbox clipped?', clip_on=True)

t.set_bbox({"boxstyle": "round, pad=0.1"})

@image_comparison(['annotation_negative_ax_coords.png'])

def test_annotation_negative_ax_coords():

fig, ax = plt.subplots()

ax.annotate('+ pts',

xytext=[30, 20], textcoords='axes points',

xy=[30, 20], xycoords='axes points', fontsize=32)

ax.annotate('- pts',

xytext=[30, -20], textcoords='axes points',

xy=[30, -20], xycoords='axes points', fontsize=32,

va='top')

ax.annotate('+ frac',

xytext=[0.75, 0.05], textcoords='axes fraction',

xy=[0.75, 0.05], xycoords='axes fraction', fontsize=32)

ax.annotate('- frac',

xytext=[0.75, -0.05], textcoords='axes fraction',

xy=[0.75, -0.05], xycoords='axes fraction', fontsize=32,

va='top')

ax.annotate('+ pixels',

xytext=[160, 25], textcoords='axes pixels',

xy=[160, 25], xycoords='axes pixels', fontsize=32)

ax.annotate('- pixels',

xytext=[160, -25], textcoords='axes pixels',

xy=[160, -25], xycoords='axes pixels', fontsize=32,

va='top')

@image_comparison(['annotation_negative_fig_coords.png'])

def test_annotation_negative_fig_coords():

fig, ax = plt.subplots()

ax.annotate('+ pts',

xytext=[10, 120], textcoords='figure points',

xy=[10, 120], xycoords='figure points', fontsize=32)

ax.annotate('- pts',

xytext=[-10, 180], textcoords='figure points',

xy=[-10, 180], xycoords='figure points', fontsize=32,

va='top')

ax.annotate('+ frac',

xytext=[0.05, 0.55], textcoords='figure fraction',

xy=[0.05, 0.55], xycoords='figure fraction', fontsize=32)

ax.annotate('- frac',

xytext=[-0.05, 0.5], textcoords='figure fraction',

xy=[-0.05, 0.5], xycoords='figure fraction', fontsize=32,

va='top')

ax.annotate('+ pixels',

xytext=[50, 50], textcoords='figure pixels',

xy=[50, 50], xycoords='figure pixels', fontsize=32)

ax.annotate('- pixels',

xytext=[-50, 100], textcoords='figure pixels',

xy=[-50, 100], xycoords='figure pixels', fontsize=32,

va='top')

def test_text_stale():

fig, (ax1, ax2) = plt.subplots(1, 2)

plt.draw_all()

assert not ax1.stale

assert not ax2.stale

assert not fig.stale

txt1 = ax1.text(.5, .5, 'aardvark')

assert ax1.stale

assert txt1.stale

assert fig.stale

ann1 = ax2.annotate('aardvark', xy=[.5, .5])

assert ax2.stale

assert ann1.stale

assert fig.stale

plt.draw_all()

assert not ax1.stale

assert not ax2.stale

assert not fig.stale

@image_comparison(['agg_text_clip.png'])

def test_agg_text_clip():

np.random.seed(1)

fig, (ax1, ax2) = plt.subplots(2)

for x, y in np.random.rand(10, 2):

ax1.text(x, y, "foo", clip_on=True)

ax2.text(x, y, "foo")

def test_text_size_binding():

mpl.rcParams['font.size'] = 10

fp = mpl.font_manager.FontProperties(size='large')

sz1 = fp.get_size_in_points()

mpl.rcParams['font.size'] = 100

assert sz1 == fp.get_size_in_points()

@image_comparison(['font_scaling.pdf'])

def test_font_scaling():

mpl.rcParams['pdf.fonttype'] = 42

fig, ax = plt.subplots(figsize=(6.4, 12.4))

ax.xaxis.set_major_locator(plt.NullLocator())

ax.yaxis.set_major_locator(plt.NullLocator())

ax.set_ylim(-10, 600)

for i, fs in enumerate(range(4, 43, 2)):

ax.text(0.1, i*30, f"{fs} pt font size", fontsize=fs)

@pytest.mark.parametrize('spacing1, spacing2', [(0.4, 2), (2, 0.4), (2, 2)])

def test_two_2line_texts(spacing1, spacing2):

text_string = 'line1\nline2'

fig = plt.figure()

renderer = fig.canvas.get_renderer()

text1 = fig.text(0.25, 0.5, text_string, linespacing=spacing1)

text2 = fig.text(0.25, 0.5, text_string, linespacing=spacing2)

fig.canvas.draw()

box1 = text1.get_window_extent(renderer=renderer)

box2 = text2.get_window_extent(renderer=renderer)

# line spacing only affects height

assert box1.width == box2.width

if spacing1 == spacing2:

assert box1.height == box2.height

else:

assert box1.height != box2.height

def test_validate_linespacing():

with pytest.raises(TypeError):

plt.text(.25, .5, "foo", linespacing="abc")

def test_nonfinite_pos():

fig, ax = plt.subplots()

ax.text(0, np.nan, 'nan')

ax.text(np.inf, 0, 'inf')

fig.canvas.draw()

def test_hinting_factor_backends():

plt.rcParams['text.hinting_factor'] = 1

fig = plt.figure()

t = fig.text(0.5, 0.5, 'some text')

fig.savefig(io.BytesIO(), format='svg')

expected = t.get_window_extent().intervalx

fig.savefig(io.BytesIO(), format='png')

# Backends should apply hinting_factor consistently (within 10%).

np.testing.assert_allclose(t.get_window_extent().intervalx, expected,

rtol=0.1)

@needs_usetex

def test_usetex_is_copied():

# Indirectly tests that update_from (which is used to copy tick label

# properties) copies usetex state.

fig = plt.figure()

plt.rcParams["text.usetex"] = False

ax1 = fig.add_subplot(121)

plt.rcParams["text.usetex"] = True

ax2 = fig.add_subplot(122)

fig.canvas.draw()

for ax, usetex in [(ax1, False), (ax2, True)]:

for t in ax.xaxis.majorTicks:

assert t.label1.get_usetex() == usetex

@needs_usetex

def test_single_artist_usetex():

# Check that a single artist marked with usetex does not get passed through

# the mathtext parser at all (for the Agg backend) (the mathtext parser

# currently fails to parse \frac12, requiring \frac{1}{2} instead).

fig = plt.figure()

fig.text(.5, .5, r"$\frac12$", usetex=True)

fig.canvas.draw()

@pytest.mark.parametrize("fmt", ["png", "pdf", "svg"])

def test_single_artist_usenotex(fmt):

# Check that a single artist can be marked as not-usetex even though the

# rcParam is on ("2_2_2" fails if passed to TeX). This currently skips

# postscript output as the ps renderer doesn't support mixing usetex and

# non-usetex.

plt.rcParams["text.usetex"] = True

fig = plt.figure()

fig.text(.5, .5, "2_2_2", usetex=False)

fig.savefig(io.BytesIO(), format=fmt)

@image_comparison(['text_as_path_opacity.svg'])

def test_text_as_path_opacity():

plt.figure()

plt.gca().set_axis_off()

plt.text(0.25, 0.25, 'c', color=(0, 0, 0, 0.5))

plt.text(0.25, 0.5, 'a', alpha=0.5)

plt.text(0.25, 0.75, 'x', alpha=0.5, color=(0, 0, 0, 1))

@image_comparison(['text_as_text_opacity.svg'])

def test_text_as_text_opacity():

mpl.rcParams['svg.fonttype'] = 'none'

plt.figure()

plt.gca().set_axis_off()

plt.text(0.25, 0.25, '50% using `color`', color=(0, 0, 0, 0.5))

plt.text(0.25, 0.5, '50% using `alpha`', alpha=0.5)

plt.text(0.25, 0.75, '50% using `alpha` and 100% `color`', alpha=0.5,

color=(0, 0, 0, 1))

def test_text_repr():

# smoketest to make sure text repr doesn't error for category

plt.plot(['A', 'B'], [1, 2])

repr(plt.text(['A'], 0.5, 'Boo'))

def test_annotation_update():

fig, ax = plt.subplots(1, 1)

an = ax.annotate('annotation', xy=(0.5, 0.5))

extent1 = an.get_window_extent(fig.canvas.get_renderer())

fig.tight_layout()

extent2 = an.get_window_extent(fig.canvas.get_renderer())

assert not np.allclose(extent1.get_points(), extent2.get_points(),

rtol=1e-6)

@check_figures_equal()

def test_annotation_units(fig_test, fig_ref):

ax = fig_test.add_subplot()

ax.plot(datetime.now(), 1, "o") # Implicitly set axes extents.

ax.annotate("x", (datetime.now(), 0.5), xycoords=("data", "axes fraction"),

# This used to crash before.

xytext=(0, 0), textcoords="offset points")

ax = fig_ref.add_subplot()

ax.plot(datetime.now(), 1, "o")

ax.annotate("x", (datetime.now(), 0.5), xycoords=("data", "axes fraction"))

@image_comparison(['large_subscript_title.png'], style='mpl20')

def test_large_subscript_title():

# Remove this line when this test image is regenerated.

plt.rcParams['text.kerning_factor'] = 6

plt.rcParams['axes.titley'] = None

fig, axs = plt.subplots(1, 2, figsize=(9, 2.5), constrained_layout=True)

ax = axs[0]

ax.set_title(r'$\sum_{i} x_i$')

ax.set_title('New way', loc='left')

ax.set_xticklabels([])

ax = axs[1]

ax.set_title(r'$\sum_{i} x_i$', y=1.01)

ax.set_title('Old Way', loc='left')

ax.set_xticklabels([])

@pytest.mark.parametrize(

"x, rotation, halign",

[(0.7, 0, 'left'),

(0.5, 95, 'left'),

(0.3, 0, 'right'),

(0.3, 185, 'left')])

def test_wrap(x, rotation, halign):

fig = plt.figure(figsize=(18, 18))

gs = GridSpec(nrows=3, ncols=3, figure=fig)

subfig = fig.add_subfigure(gs[1, 1])

# we only use the central subfigure, which does not align with any

# figure boundary, to ensure only subfigure boundaries are relevant

s = 'This is a very long text that should be wrapped multiple times.'

text = subfig.text(x, 0.7, s, wrap=True, rotation=rotation, ha=halign)

fig.canvas.draw()

assert text._get_wrapped_text() == ('This is a very long\n'

'text that should be\n'

'wrapped multiple\n'

'times.')

def test_mathwrap():

fig = plt.figure(figsize=(6, 4))

s = r'This is a very $\overline{\mathrm{long}}$ line of Mathtext.'

text = fig.text(0, 0.5, s, size=40, wrap=True)

fig.canvas.draw()

assert text._get_wrapped_text() == ('This is a very $\\overline{\\mathrm{long}}$\n'

'line of Mathtext.')

def test_get_window_extent_wrapped():

# Test that a long title that wraps to two lines has the same vertical

# extent as an explicit two line title.

fig1 = plt.figure(figsize=(3, 3))

fig1.suptitle("suptitle that is clearly too long in this case", wrap=True)

window_extent_test = fig1._suptitle.get_window_extent()

fig2 = plt.figure(figsize=(3, 3))

fig2.suptitle("suptitle that is clearly\ntoo long in this case")

window_extent_ref = fig2._suptitle.get_window_extent()

assert window_extent_test.y0 == window_extent_ref.y0

assert window_extent_test.y1 == window_extent_ref.y1

def test_long_word_wrap():

fig = plt.figure(figsize=(6, 4))

text = fig.text(9.5, 8, 'Alonglineoftexttowrap', wrap=True)

fig.canvas.draw()

assert text._get_wrapped_text() == 'Alonglineoftexttowrap'

def test_wrap_no_wrap():

fig = plt.figure(figsize=(6, 4))

text = fig.text(0, 0, 'non wrapped text', wrap=True)

fig.canvas.draw()

assert text._get_wrapped_text() == 'non wrapped text'

@check_figures_equal()

def test_buffer_size(fig_test, fig_ref):

# On old versions of the Agg renderer, large non-ascii single-character

# strings (here, "€") would be rendered clipped because the rendering

# buffer would be set by the physical size of the smaller "a" character.

ax = fig_test.add_subplot()

ax.set_yticks([0, 1])

ax.set_yticklabels(["€", "a"])

ax.yaxis.majorTicks[1].label1.set_color("w")

ax = fig_ref.add_subplot()

ax.set_yticks([0, 1])

ax.set_yticklabels(["€", ""])

def test_fontproperties_kwarg_precedence():

"""Test that kwargs take precedence over fontproperties defaults."""

plt.figure()

text1 = plt.xlabel("value", fontproperties='Times New Roman', size=40.0)

text2 = plt.ylabel("counts", size=40.0, fontproperties='Times New Roman')

assert text1.get_size() == 40.0

assert text2.get_size() == 40.0

def test_transform_rotates_text():

ax = plt.gca()

transform = mtransforms.Affine2D().rotate_deg(30)

text = ax.text(0, 0, 'test', transform=transform,

transform_rotates_text=True)

result = text.get_rotation()

assert_almost_equal(result, 30)

def test_update_mutate_input():

inp = dict(fontproperties=FontProperties(weight="bold"),

bbox=None)

cache = dict(inp)

t = Text()

t.update(inp)

assert inp['fontproperties'] == cache['fontproperties']

assert inp['bbox'] == cache['bbox']

@pytest.mark.parametrize('rotation', ['invalid string', [90]])

def test_invalid_rotation_values(rotation):

with pytest.raises(

ValueError,

match=("rotation must be 'vertical', 'horizontal' or a number")):

Text(0, 0, 'foo', rotation=rotation)

def test_invalid_color():

with pytest.raises(ValueError):

plt.figtext(.5, .5, "foo", c="foobar")

@image_comparison(['text_pdf_kerning.pdf'], style='mpl20')

def test_pdf_kerning():

plt.figure()

plt.figtext(0.1, 0.5, "ATATATATATATATATATA", size=30)

def test_unsupported_script(recwarn):

fig = plt.figure()

t = fig.text(.5, .5, "\N{BENGALI DIGIT ZERO}")

fig.canvas.draw()

assert all(isinstance(warn.message, UserWarning) for warn in recwarn)

assert (

[warn.message.args for warn in recwarn] ==

[(r"Glyph 2534 (\N{BENGALI DIGIT ZERO}) missing from font(s) "

+ f"{t.get_fontname()}.",),

(r"Matplotlib currently does not support Bengali natively.",)])

# See gh-26152 for more information on this xfail

@pytest.mark.xfail(pyparsing_version.release == (3, 1, 0),

reason="Error messages are incorrect with pyparsing 3.1.0")

def test_parse_math():

fig, ax = plt.subplots()

ax.text(0, 0, r"$ \wrong{math} $", parse_math=False)

fig.canvas.draw()

ax.text(0, 0, r"$ \wrong{math} $", parse_math=True)

with pytest.raises(ValueError, match='Unknown symbol'):

fig.canvas.draw()

# See gh-26152 for more information on this xfail

@pytest.mark.xfail(pyparsing_version.release == (3, 1, 0),

reason="Error messages are incorrect with pyparsing 3.1.0")

def test_parse_math_rcparams():

# Default is True

fig, ax = plt.subplots()

ax.text(0, 0, r"$ \wrong{math} $")

with pytest.raises(ValueError, match='Unknown symbol'):

fig.canvas.draw()

# Setting rcParams to False

with mpl.rc_context({'text.parse_math': False}):

fig, ax = plt.subplots()

ax.text(0, 0, r"$ \wrong{math} $")

fig.canvas.draw()

@image_comparison(['text_pdf_font42_kerning.pdf'], style='mpl20')

def test_pdf_font42_kerning():

plt.rcParams['pdf.fonttype'] = 42

plt.figure()

plt.figtext(0.1, 0.5, "ATAVATAVATAVATAVATA", size=30)

@image_comparison(['text_pdf_chars_beyond_bmp.pdf'], style='mpl20')

def test_pdf_chars_beyond_bmp():

plt.rcParams['pdf.fonttype'] = 42

plt.rcParams['mathtext.fontset'] = 'stixsans'

plt.figure()

plt.figtext(0.1, 0.5, "Mass $m$ \U00010308", size=30)

@needs_usetex

def test_metrics_cache():

# dig into the signature to get the mutable default used as a cache

renderer_cache = inspect.signature(

mpl.text._get_text_metrics_function

).parameters['_cache'].default

renderer_cache.clear()

fig = plt.figure()

fig.text(.3, .5, "foo\nbar")

fig.text(.3, .5, "foo\nbar", usetex=True)

fig.text(.5, .5, "foo\nbar", usetex=True)

fig.canvas.draw()

renderer = fig._get_renderer()

assert renderer in renderer_cache

ys = {} # mapping of strings to where they were drawn in y with draw_tex.

def call(*args, **kwargs):

renderer, x, y, s, *_ = args

ys.setdefault(s, set()).add(y)

renderer.draw_tex = call

fig.canvas.draw()

assert [*ys] == ["foo", "bar"]

# Check that both TeX strings were drawn with the same y-position for both

# single-line substrings. Previously, there used to be an incorrect cache

# collision with the non-TeX string (drawn first here) whose metrics would

# get incorrectly reused by the first TeX string.

assert len(ys["foo"]) == len(ys["bar"]) == 1

info = renderer_cache[renderer].cache_info()

# Every string gets a miss for the first layouting (extents), then a hit

# when drawing, but "foo\nbar" gets two hits as it's drawn twice.

assert info.hits > info.misses

def test_metrics_cache2():

# dig into the signature to get the mutable default used as a cache

renderer_cache = inspect.signature(

mpl.text._get_text_metrics_function

).parameters['_cache'].default

gc.collect()

renderer_cache.clear()

def helper():

fig, ax = plt.subplots()

fig.draw_without_rendering()

# show we hit the outer cache

assert len(renderer_cache) == 1

func = renderer_cache[fig.canvas.get_renderer()]

cache_info = func.cache_info()

# show we hit the inner cache

assert cache_info.currsize > 0

assert cache_info.currsize == cache_info.misses

assert cache_info.hits > cache_info.misses

plt.close(fig)

helper()

gc.collect()

# show the outer cache has a lifetime tied to the renderer (via the figure)

assert len(renderer_cache) == 0

def test_annotate_offset_fontsize():

# Test that offset_fontsize parameter works and uses accurate values

fig, ax = plt.subplots()

text_coords = ['offset points', 'offset fontsize']

# 10 points should be equal to 1 fontsize unit at fontsize=10

xy_text = [(10, 10), (1, 1)]

anns = [ax.annotate('test', xy=(0.5, 0.5),

xytext=xy_text[i],

fontsize='10',

xycoords='data',

textcoords=text_coords[i]) for i in range(2)]

points_coords, fontsize_coords = (ann.get_window_extent() for ann in anns)

fig.canvas.draw()

assert str(points_coords) == str(fontsize_coords)

def test_get_set_antialiased():

txt = Text(.5, .5, "foo\nbar")

assert txt._antialiased == mpl.rcParams['text.antialiased']

assert txt.get_antialiased() == mpl.rcParams['text.antialiased']

txt.set_antialiased(True)

assert txt._antialiased is True

assert txt.get_antialiased() == txt._antialiased

txt.set_antialiased(False)

assert txt._antialiased is False

assert txt.get_antialiased() == txt._antialiased

def test_annotation_antialiased():

annot = Annotation("foo\nbar", (.5, .5), antialiased=True)

assert annot._antialiased is True

assert annot.get_antialiased() == annot._antialiased

annot2 = Annotation("foo\nbar", (.5, .5), antialiased=False)

assert annot2._antialiased is False

assert annot2.get_antialiased() == annot2._antialiased

annot3 = Annotation("foo\nbar", (.5, .5), antialiased=False)

annot3.set_antialiased(True)

assert annot3.get_antialiased() is True

assert annot3._antialiased is True

annot4 = Annotation("foo\nbar", (.5, .5))

assert annot4._antialiased == mpl.rcParams['text.antialiased']

@check_figures_equal()

def test_annotate_and_offsetfrom_copy_input(fig_test, fig_ref):

# Both approaches place the text (10, 0) pixels away from the center of the line.

ax = fig_test.add_subplot()

l, = ax.plot([0, 2], [0, 2])

of_xy = np.array([.5, .5])

ax.annotate("foo", textcoords=OffsetFrom(l, of_xy), xytext=(10, 0),

xy=(0, 0)) # xy is unused.