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Add a unit test for large chains of products

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This commit is contained in:
Gael Guennebaud
2015-10-28 12:53:13 +01:00
parent 902c2db5a5
commit 1f11dd6ced
2 changed files with 22 additions and 0 deletions
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11
test/product_small.cpp
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@@ -56,5 +56,16 @@ void test_product_small()
VERIFY_IS_APPROX(B * A.inverse(), B * A.inverse()[0]);
VERIFY_IS_APPROX(A.inverse() * C, A.inverse()[0] * C);
}
{
Eigen::Matrix<double, 100, 100> A, B, C;
A.setRandom();
C = A;
for(int k=0; k<79; ++k)
C = C * A;
B.noalias() = (((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A)) * ((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A)))
* (((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A)) * ((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A))*((A*A)*(A*A)));
VERIFY_IS_APPROX(B,C);
}
#endif
}