Add integration test

.gitignore

@@ -1,3 +1,7 @@
 # Results of C compilation
 *.o
-lib.so
+lib.so
+
+
+# Test artifacts
+test/*/

test/integration_tests.jl

@@ -0,0 +1,23 @@
+@testset "Integration tests" begin
+    #= DEFAULT MODELS =#
+    gen = TaylorGenerator("sincos", "sincos.eqs", ".")
+    generate_dir(gen)
+    han = get_handler(gen, true)
+
+    function flow(x, t, han)
+        y = similar(x)
+        ccall(han.symbols["flow"], Cint, (Cdouble, Ptr{Cdouble}, Ptr{Cdouble}, Ptr{Cvoid}),
+            t, x, y, Ref(nothing)
+        )
+        return y
+    end
+
+    x = [1., 0.]
+    ts = LinRange(0., 2π, 101)
+    ys = map(t->flow(x, t, han), ts)
+    y1 = map(i->i[1], ys)
+    y2 = map(i->i[2], ys)
+
+    @test y1 ≈ cos.(ts)
+    @test y2 ≈ -sin.(ts)
+end

test/sincos.eqs

@@ -0,0 +1,2 @@
+diff(x, t) = y;
+diff(y, t) = -x;