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-rw-r--r--numpy/polynomial/tests/test_classes.py50
1 files changed, 50 insertions, 0 deletions
diff --git a/numpy/polynomial/tests/test_classes.py b/numpy/polynomial/tests/test_classes.py
index 738741668..15e24f92b 100644
--- a/numpy/polynomial/tests/test_classes.py
+++ b/numpy/polynomial/tests/test_classes.py
@@ -562,6 +562,56 @@ def test_ufunc_override(Poly):
assert_raises(TypeError, np.add, x, p)
+
+class TestLatexRepr(object):
+ """Test the latex repr used by ipython """
+
+ def as_latex(self, obj):
+ # right now we ignore the formatting of scalars in our tests, since
+ # it makes them too verbose. Ideally, the formatting of scalars will
+ # be fixed such that tests below continue to pass
+ obj._repr_latex_scalar = lambda x: str(x)
+ try:
+ return obj._repr_latex_()
+ finally:
+ del obj._repr_latex_scalar
+
+ def test_simple_polynomial(self):
+ # default input
+ p = Polynomial([1, 2, 3])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0 + 2.0\,x + 3.0\,x^{2}$')
+
+ # translated input
+ p = Polynomial([1, 2, 3], domain=[-2, 0])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0 + 2.0\,\left(1.0 + x\right) + 3.0\,\left(1.0 + x\right)^{2}$')
+
+ # scaled input
+ p = Polynomial([1, 2, 3], domain=[-0.5, 0.5])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0 + 2.0\,\left(2.0x\right) + 3.0\,\left(2.0x\right)^{2}$')
+
+ # affine input
+ p = Polynomial([1, 2, 3], domain=[-1, 0])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0 + 2.0\,\left(1.0 + 2.0x\right) + 3.0\,\left(1.0 + 2.0x\right)^{2}$')
+
+ def test_basis_func(self):
+ p = Chebyshev([1, 2, 3])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0\,{T}_{0}(x) + 2.0\,{T}_{1}(x) + 3.0\,{T}_{2}(x)$')
+ # affine input - check no surplus parens are added
+ p = Chebyshev([1, 2, 3], domain=[-1, 0])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0\,{T}_{0}(1.0 + 2.0x) + 2.0\,{T}_{1}(1.0 + 2.0x) + 3.0\,{T}_{2}(1.0 + 2.0x)$')
+
+ def test_multichar_basis_func(self):
+ p = HermiteE([1, 2, 3])
+ assert_equal(self.as_latex(p),
+ r'$x \mapsto 1.0\,{He}_{0}(x) + 2.0\,{He}_{1}(x) + 3.0\,{He}_{2}(x)$')
+
+
#
# Test class method that only exists for some classes
#