def construct(self):
analysis = Tex(r"Análisis y Modelamiento", color=BLUE).scale(1.4)
numeric = Tex(r"Numérico I", color=BLUE).scale(1.4).shift(DOWN + LEFT)
year_name = Tex("2020-1",
color=GREEN).scale(1.4).next_to(numeric, RIGHT)
self.add(analysis, numeric, year_name)
self.wait(1)
def create_seed_obj(self, obj):
seed = obj["general_info"]["seed"]
seed_text = Tex(seed, color=self.TEXT_COLOR)
def update(t):
seed_text.set_width(self.camera_frame.get_width() * 0.2)
seed_text.next_to([self.camera_frame.get_width() / 2, self.camera_frame.get_height() / 2, 0], direction=LEFT + DOWN, buff=0)
seed_text.shift(
LEFT * self.camera_frame.get_width() * 0.05 +
DOWN * self.camera_frame.get_height() * 0.05
)
seed_text.add_updater(update)
return seed_text
def test_tex_size():
"""Check that the size of a :class:`Tex` string is not changed."""
text = Tex("what").center()
vertical = text.get_top() - text.get_bottom()
horizontal = text.get_right() - text.get_left()
assert round(vertical[1], 4) == 0.3512
assert round(horizontal[0], 4) == 1.0420
def test_tex_white_space_and_non_whitespace_args():
"""Check that correct number of submobjects are created per string when mixing characters with whitespace"""
separator = ", \n . \t\t"
str_part_1 = "Hello"
str_part_2 = "world"
str_part_3 = "It is"
str_part_4 = "me!"
tex = Tex(str_part_1, str_part_2, str_part_3, str_part_4, arg_separator=separator)
assert len(tex) == 4
assert len(tex[0]) == len("".join((str_part_1 + separator).split()))
assert len(tex[1]) == len("".join((str_part_2 + separator).split()))
assert len(tex[2]) == len("".join((str_part_3 + separator).split()))
assert len(tex[3]) == len("".join(str_part_4.split()))
def test_log_error_no_relevant_context(capsys):
"""Test that an error with no environment context contains no environment context"""
failing_preamble = r"""\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{not_a_font}"""
with pytest.raises(ValueError) as err:
Tex(
"The template uses a non-existent font",
tex_template=TexTemplate(preamble=failing_preamble),
)
# validate useless TeX error not logged for user
assert "Context" not in str(capsys.readouterr().out)
# validate useful error message raised
# this won't happen if an error is raised while formatting the message
assert "See log output above or the log file" in str(err.value)
def test_log_error_context(capsys):
"""Test that the environment context of an error is correctly logged if it exists"""
invalid_tex = r"""
some text that is fine
\begin{unbalanced_braces}{
not fine
\end{not_even_the_right_env}
"""
with pytest.raises(ValueError) as err:
Tex(invalid_tex)
# validate useful TeX error logged to user
assert "unbalanced_braces" in str(capsys.readouterr().out)
# validate useful error message raised
assert "See log output above or the log file" in str(err.value)
def test_tex_non_whitespace_arg(using_opengl_renderer):
"""Check that correct number of submobjects are created per string with non_whitespace characters"""
separator = ","
str_part_1 = "Hello"
str_part_2 = "world"
str_part_3 = "It is"
str_part_4 = "me!"
tex = Tex(str_part_1,
str_part_2,
str_part_3,
str_part_4,
arg_separator=separator)
assert len(tex) == 4
assert len(tex[0]) == len("".join((str_part_1 + separator).split()))
assert len(tex[1]) == len("".join((str_part_2 + separator).split()))
assert len(tex[2]) == len("".join((str_part_3 + separator).split()))
assert len(tex[3]) == len("".join(str_part_4.split()))
def test_error_in_nested_context(capsys):
"""Test that displayed error context is not excessively large"""
invalid_tex = r"""
\begin{align}
\begin{tabular}{ c }
no need to display \\
this correct text \\
\end{tabular}
\notacontrolsequence
\end{align}
"""
with pytest.raises(ValueError) as err:
Tex(invalid_tex)
stdout = str(capsys.readouterr().out)
# validate useless context is not included
assert r"\begin{frame}" not in stdout
def test_tex():
Tex("The horse does not eat cucumber salad.")
assert Path(config.media_dir, "Tex", "983949cac5bdd272.svg").exists()
def test_changing_font_size():
"""Test that the font_size property properly scales tex_mobject.py classes."""
num = Tex("0", font_size=12)
num.font_size = 48
assert num.height == Tex("0", font_size=48).height
def mark_tex_caption(node, tex) -> Write:
nd = Tex(tex)
nd.scale(0.45)
nd.next_to(node, aligned_edge=UR)
return Write(nd)
def test_tex(temp_media_dir):
Tex("The horse does not eat cucumber salad.")
assert (temp_media_dir / "Tex" / "983949cac5bdd272.svg").exists()
def test_percent_char_rendering():
Tex(r"\%")
assert Path(config.media_dir, "Tex", "ce6e53f2d9c537bb.tex").exists()
def construct(self):
tex_template = TexTemplate(preamble=r"\usepackage{notapackage}")
some_tex = r"\frac{1}{0}"
my_tex = Tex(some_tex, tex_template=tex_template)
self.add(my_tex)
def construct(self):
self.add(Square())
self.add(Text("Prepare for unforeseen consequencesλ"))
self.add(Tex(r"$\lambda$"))
self.wait(1)
