adds tests for rational_solutions

Author: ederc

test/algorithms/solvers.jl

@@ -12,7 +12,10 @@
             [7087075322218650694049//37778931862957161709568, 1480060550928923391483//18889465931478580854784, 2780329556045248126029//37778931862957161709568, 38421910449864642395061//151115727451828646838272],
             [196765270119568550571//590295810358705651712, 0, 1//2361183241434822606848, 787061080478274202283//2361183241434822606848]
                             ]
+    rat_sols = Vector{fmpq}[[49, 0, 0, 0], [49//3, 0, 0, 1//3]]
+
     @test sols == real_solutions(I)
+    @test rat_sols == rational_solutions(I)
     @test I.real_sols == real_solutions(I)
 
     C, x = PolynomialRing(QQ, "x")