cec2020: add more tests

bench/cec2020/benchFunctions_test.go

@@ -48,3 +48,36 @@ func TestGriewank(t *testing.T) {
 		t.Errorf("unexpected result from Griewank, want: %f, got: %v", want, got)
 	}
 }
+
+func TestHybrid1(t *testing.T) {
+	in := []float64{-9.2, 10, .7, 3, -80.2843}
+	want := 0.00025455132345086895
+
+	got := Hybrid1(in)
+
+	if got != want {
+		t.Errorf("unexpected result from Hybrid1, want: %f, got: %v", want, got)
+	}
+}
+
+func TestHybrid2(t *testing.T) {
+	in := []float64{-9.2, 10, .7, 3, -80.2843}
+	want := 25.298615746321026
+
+	got := Hybrid2(in)
+
+	if got != want {
+		t.Errorf("unexpected result from Hybrid2, want: %f, got: %v", want, got)
+	}
+}
+
+func TestHybrid3(t *testing.T) {
+	in := []float64{-9.2, 10, .7, 3, -80.2843}
+	want := 16.298615746321026
+
+	got := Hybrid3(in)
+
+	if got != want {
+		t.Errorf("unexpected result from Hybrid3, want: %f, got: %v", want, got)
+	}
+}