commit 3f32f5ec221c443fa354aaa1ea6d5628bb971474
author Gael Guennebaud <g.gael@free.fr> Fri Nov 27 16:27:53 2015 +0100
committer Gael Guennebaud <g.gael@free.fr> Fri Nov 27 16:27:53 2015 +0100
tree cd98d6ff1572eb9043c1fe51f9607307ac4e7335
parent da46b1ed5412a7bf727f489ca4f782abcd4743e8

ArrayBase::sign: add unit test and fix doc

test/array.cpp

diff --git a/test/array.cpp b/test/array.cpp
index d437105..367bda2 100644
--- a/test/array.cpp
+++ b/test/array.cpp
@@ -230,6 +230,7 @@
   VERIFY_IS_APPROX(m1.square(), square(m1));
   VERIFY_IS_APPROX(m1.cube(), cube(m1));
   VERIFY_IS_APPROX(cos(m1+RealScalar(3)*m2), cos((m1+RealScalar(3)*m2).eval()));
+  VERIFY_IS_APPROX(m1.sign(), sign(m1));
 
 
   // avoid NaNs with abs() so verification doesn't fail
@@ -255,6 +256,9 @@
   VERIFY_IS_APPROX(inverse(inverse(m1)),m1);
   VERIFY((abs(m1) == m1 || abs(m1) == -m1).all());
   VERIFY_IS_APPROX(m3, sqrt(abs2(m1)));
+  VERIFY_IS_APPROX( m1.sign(), -(-m1).sign() );
+  VERIFY_IS_APPROX( m1*m1.sign(),m1.abs());
+  VERIFY_IS_APPROX(m1.sign() * m1.abs(), m1);
 
   VERIFY_IS_APPROX(numext::abs2(numext::real(m1)) + numext::abs2(numext::imag(m1)), numext::abs2(m1));
   VERIFY_IS_APPROX(numext::abs2(real(m1)) + numext::abs2(imag(m1)), numext::abs2(m1));
@@ -348,6 +352,7 @@
   VERIFY_IS_APPROX(m1.square(), square(m1));
   VERIFY_IS_APPROX(m1.cube(), cube(m1));
   VERIFY_IS_APPROX(cos(m1+RealScalar(3)*m2), cos((m1+RealScalar(3)*m2).eval()));
+  VERIFY_IS_APPROX(m1.sign(), sign(m1));
 
 
   VERIFY_IS_APPROX(m1.exp() * m2.exp(), exp(m1+m2));
@@ -391,6 +396,9 @@
   VERIFY_IS_APPROX(abs(m1), sqrt(abs2(m1)));
   VERIFY_IS_APPROX(log10(m1), log(m1)/log(10));
 
+  VERIFY_IS_APPROX( m1.sign(), -(-m1).sign() );
+  VERIFY_IS_APPROX( m1.sign() * m1.abs(), m1);
+
   // scalar by array division
   const RealScalar tiny = sqrt(std::numeric_limits<RealScalar>::epsilon());
   s1 += Scalar(tiny);