Fix: fraction rendering

test/calculus/core/test_render.py

@@ -0,0 +1,31 @@
+import mapytex
+
+def test_default_render():
+    assert mapytex.render.render_name == "txt"
+
+def test_default_rending():
+    e = mapytex.Expression("2*3")
+    assert str(e) == "2*3"
+
+def test_changing_render():
+    assert mapytex.render.render_name == "txt"
+    mapytex.render.set_render("tex")
+    assert mapytex.render.render_name == "tex"
+    mapytex.render.set_render("txt")
+    assert mapytex.render.render_name == "txt"
+
+
+def test_changing_rending():
+    e = mapytex.Expression.from_str("2*3")
+    f = mapytex.Fraction("2/3")
+    assert str(e) == "2 * 3"
+    assert str(f) == "2 / 3"
+    mapytex.render.set_render("tex")
+    assert str(e) == "2 \\times 3"
+    assert str(f) == "\\dfrac{2}{3}"
+    mapytex.render.set_render("txt")
+    assert str(e) == "2 * 3"
+    assert str(f) == "2 / 3"
+
+
+