test: account for allow_algebraic in tests

Author: AayushSabharwal

test/nonlinearsystem.jl

@@ -300,7 +300,7 @@ sys = structural_simplify(ns; conservative = true)
     ps = [σ => 10.0, ρ => 26.0, β => 8 / 3]
     @mtkbuild ns = NonlinearSystem(eqs)
 
-    @test isequal(calculate_jacobian(ns), [2x])
+    @test isequal(calculate_jacobian(ns), [2x;;])
     # solve without analytical jacobian
     prob = NonlinearProblem(ns, guesses, ps)
     sol = solve(prob, NewtonRaphson())
@@ -374,7 +374,7 @@ end
     end
 
     @variables y
-    @mtkbuild sys = NonlinearSystem([0 ~ x * x - p * x + p, 0 ~ x * y + p])
+    @mtkbuild sys=NonlinearSystem([0 ~ x * x - p * x + p, 0 ~ x * y + p]) allow_algebraic=false
     @test_throws ["single equation", "unknown"] IntervalNonlinearProblem(sys, (0.0, 1.0))
     @test_throws ["single equation", "unknown"] IntervalNonlinearFunction(sys, (0.0, 1.0))
     @test_throws ["single equation", "unknown"] IntervalNonlinearProblemExpr(