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from __future__ import annotations |
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from pathlib import Path |
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import pytest |
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from manim import MathTex, SingleStringMathTex, Tex |
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def test_MathTex(config, using_opengl_renderer): |
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MathTex("a^2 + b^2 = c^2") |
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assert Path(config.media_dir, "Tex", "e4be163a00cf424f.svg").exists() |
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def test_SingleStringMathTex(config, using_opengl_renderer): |
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SingleStringMathTex("test") |
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assert Path(config.media_dir, "Tex", "8ce17c7f5013209f.svg").exists() |
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@pytest.mark.parametrize( |
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("text_input", "length_sub"), |
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[("{{ a }} + {{ b }} = {{ c }}", 5), (r"\frac{1}{a+b\sqrt{2}}", 1)], |
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) |
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def test_double_braces_testing(using_opengl_renderer, text_input, length_sub): |
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t1 = MathTex(text_input) |
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assert len(t1.submobjects) == length_sub |
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def test_tex(config, using_opengl_renderer): |
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Tex("The horse does not eat cucumber salad.") |
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assert Path(config.media_dir, "Tex", "c3945e23e546c95a.svg").exists() |
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def test_tex_whitespace_arg(using_opengl_renderer): |
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"""Check that correct number of submobjects are created per string with whitespace separator""" |
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separator = "\t" |
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str_part_1 = "Hello" |
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str_part_2 = "world" |
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str_part_3 = "It is" |
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str_part_4 = "me!" |
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tex = Tex(str_part_1, str_part_2, str_part_3, str_part_4, arg_separator=separator) |
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assert len(tex) == 4 |
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assert len(tex[0]) == len("".join((str_part_1 + separator).split())) |
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assert len(tex[1]) == len("".join((str_part_2 + separator).split())) |
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assert len(tex[2]) == len("".join((str_part_3 + separator).split())) |
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assert len(tex[3]) == len("".join(str_part_4.split())) |
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def test_tex_non_whitespace_arg(using_opengl_renderer): |
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"""Check that correct number of submobjects are created per string with non_whitespace characters""" |
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separator = "," |
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str_part_1 = "Hello" |
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str_part_2 = "world" |
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str_part_3 = "It is" |
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str_part_4 = "me!" |
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tex = Tex(str_part_1, str_part_2, str_part_3, str_part_4, arg_separator=separator) |
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assert len(tex) == 4 |
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assert len(tex[0]) == len("".join((str_part_1 + separator).split())) |
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assert len(tex[1]) == len("".join((str_part_2 + separator).split())) |
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assert len(tex[2]) == len("".join((str_part_3 + separator).split())) |
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assert len(tex[3]) == len("".join(str_part_4.split())) |
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def test_tex_white_space_and_non_whitespace_args(using_opengl_renderer): |
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"""Check that correct number of submobjects are created per string when mixing characters with whitespace""" |
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separator = ", \n . \t\t" |
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str_part_1 = "Hello" |
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str_part_2 = "world" |
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str_part_3 = "It is" |
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str_part_4 = "me!" |
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tex = Tex(str_part_1, str_part_2, str_part_3, str_part_4, arg_separator=separator) |
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assert len(tex) == 4 |
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assert len(tex[0]) == len("".join((str_part_1 + separator).split())) |
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assert len(tex[1]) == len("".join((str_part_2 + separator).split())) |
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assert len(tex[2]) == len("".join((str_part_3 + separator).split())) |
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assert len(tex[3]) == len("".join(str_part_4.split())) |
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def test_tex_size(using_opengl_renderer): |
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"""Check that the size of a :class:`Tex` string is not changed.""" |
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text = Tex("what").center() |
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vertical = text.get_top() - text.get_bottom() |
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horizontal = text.get_right() - text.get_left() |
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assert round(vertical[1], 4) == 0.3512 |
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assert round(horizontal[0], 4) == 1.0420 |
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def test_font_size(using_opengl_renderer): |
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"""Test that tex_mobject classes return |
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the correct font_size value after being scaled. |
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""" |
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string = MathTex(0).scale(0.3) |
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assert round(string.font_size, 5) == 14.4 |
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def test_font_size_vs_scale(using_opengl_renderer): |
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"""Test that scale produces the same results as .scale()""" |
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num = MathTex(0, font_size=12) |
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num_scale = MathTex(0).scale(1 / 4) |
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assert num.height == num_scale.height |
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def test_changing_font_size(using_opengl_renderer): |
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"""Test that the font_size property properly scales tex_mobject.py classes.""" |
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num = Tex("0", font_size=12) |
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num.font_size = 48 |
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assert num.height == Tex("0", font_size=48).height |
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