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import numpy as np
from matplotlib.colors import to_rgba
from matplotlib.text import Text as MPLText
from numpy.testing import assert_array_almost_equal
from seaborn._core.plot import Plot
from seaborn._marks.text import Text
class TestText:
def get_texts(self, ax):
if ax.texts:
return list(ax.texts)
else:
# Compatibility with matplotlib < 3.5 (I think)
return [a for a in ax.artists if isinstance(a, MPLText)]
def test_simple(self):
x = y = [1, 2, 3]
s = list("abc")
p = Plot(x, y, text=s).add(Text()).plot()
ax = p._figure.axes[0]
for i, text in enumerate(self.get_texts(ax)):
x_, y_ = text.get_position()
assert x_ == x[i]
assert y_ == y[i]
assert text.get_text() == s[i]
assert text.get_horizontalalignment() == "center"
assert text.get_verticalalignment() == "center_baseline"
def test_set_properties(self):
x = y = [1, 2, 3]
s = list("abc")
color = "red"
alpha = .6
fontsize = 6
valign = "bottom"
m = Text(color=color, alpha=alpha, fontsize=fontsize, valign=valign)
p = Plot(x, y, text=s).add(m).plot()
ax = p._figure.axes[0]
for i, text in enumerate(self.get_texts(ax)):
assert text.get_text() == s[i]
assert text.get_color() == to_rgba(m.color, m.alpha)
assert text.get_fontsize() == m.fontsize
assert text.get_verticalalignment() == m.valign
def test_mapped_properties(self):
x = y = [1, 2, 3]
s = list("abc")
color = list("aab")
fontsize = [1, 2, 4]
p = Plot(x, y, color=color, fontsize=fontsize, text=s).add(Text()).plot()
ax = p._figure.axes[0]
texts = self.get_texts(ax)
assert texts[0].get_color() == texts[1].get_color()
assert texts[0].get_color() != texts[2].get_color()
assert (
texts[0].get_fontsize()
< texts[1].get_fontsize()
< texts[2].get_fontsize()
)
def test_mapped_alignment(self):
x = [1, 2]
p = Plot(x=x, y=x, halign=x, valign=x, text=x).add(Text()).plot()
ax = p._figure.axes[0]
t1, t2 = self.get_texts(ax)
assert t1.get_horizontalalignment() == "left"
assert t2.get_horizontalalignment() == "right"
assert t1.get_verticalalignment() == "top"
assert t2.get_verticalalignment() == "bottom"
def test_identity_fontsize(self):
x = y = [1, 2, 3]
s = list("abc")
fs = [5, 8, 12]
p = Plot(x, y, text=s, fontsize=fs).add(Text()).scale(fontsize=None).plot()
ax = p._figure.axes[0]
for i, text in enumerate(self.get_texts(ax)):
assert text.get_fontsize() == fs[i]
def test_offset_centered(self):
x = y = [1, 2, 3]
s = list("abc")
p = Plot(x, y, text=s).add(Text()).plot()
ax = p._figure.axes[0]
ax_trans = ax.transData.get_matrix()
for text in self.get_texts(ax):
assert_array_almost_equal(text.get_transform().get_matrix(), ax_trans)
def test_offset_valign(self):
x = y = [1, 2, 3]
s = list("abc")
m = Text(valign="bottom", fontsize=5, offset=.1)
p = Plot(x, y, text=s).add(m).plot()
ax = p._figure.axes[0]
expected_shift_matrix = np.zeros((3, 3))
expected_shift_matrix[1, -1] = m.offset * ax.figure.dpi / 72
ax_trans = ax.transData.get_matrix()
for text in self.get_texts(ax):
shift_matrix = text.get_transform().get_matrix() - ax_trans
assert_array_almost_equal(shift_matrix, expected_shift_matrix)
def test_offset_halign(self):
x = y = [1, 2, 3]
s = list("abc")
m = Text(halign="right", fontsize=10, offset=.5)
p = Plot(x, y, text=s).add(m).plot()
ax = p._figure.axes[0]
expected_shift_matrix = np.zeros((3, 3))
expected_shift_matrix[0, -1] = -m.offset * ax.figure.dpi / 72
ax_trans = ax.transData.get_matrix()
for text in self.get_texts(ax):
shift_matrix = text.get_transform().get_matrix() - ax_trans
assert_array_almost_equal(shift_matrix, expected_shift_matrix)
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