Fix: fraction rendering

mapytex/__init__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # encoding: utf-8
 
-from .calculus import Expression, Integer, Decimal, random_list, render, Polynomial
+from .calculus import Expression, Integer, Decimal, random_list, render, Polynomial, Fraction
 
 # Expression.set_render('tex')
 

mapytex/calculus/API/__init__.py

@@ -123,11 +123,11 @@ x^7
 - 2x^2 + 7x - 6
 """
 
+from .renders import render
 from .expression import Expression
 from .tokens import Token
 from .tokens.polynomial import Polynomial
 from .tokens.number import Integer, Decimal, Fraction
-from .renders import render
 
 
 if __name__ == "__main__":

mapytex/calculus/API/renders.py

@@ -29,6 +29,10 @@ class Render(object):
         else:
             raise ValueError("This render name already exists")
 
+    @property
+    def render_name(self):
+        return self._render
+
     @property
     def render(self):
         return self.renders[self._render]

mapytex/calculus/API/tokens/number.py

@@ -141,7 +141,7 @@ class Decimal(Token):
 
 class Fraction(Token):
 
-    """ Token representing a fraction
+    """ Token representing a fraction of numbers
 
     :example:
     >>> Fraction("3/4")

mapytex/calculus/API/tokens/token.py

@@ -54,9 +54,15 @@ class Token(object):
             yield self
 
     def __repr__(self):
+        try:
+            return f"<{self.__class__.__name__} {render(self._mo._tree, 'txt')}>"
+        except AttributeError:
             return f"<{self.__class__.__name__} {render(self._mo, 'txt')}>"
 
     def __str__(self):
+        try:
+            return render(self._mo._tree)
+        except AttributeError:
             return render(self._mo)
 
     @property

mapytex/calculus/__init__.py

@@ -30,7 +30,7 @@ Expression is the classe wich handle all calculus. It can randomly generate or i
 
 """
 
-from .API import Expression, Integer, Decimal, render, Polynomial
+from .API import Expression, Integer, Decimal, render, Polynomial, Fraction
 from .core import random_list
 from decimal import getcontext
 #getcontext().prec = 2

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"
+
+
+