it("returns data components but not axis components", () => {
   const componentResult = Helpers.getDataComponents(childComponents);
   expect(componentResult).to.have.members([bar, line]);
   expect(componentResult).not.to.have.members([axis]);
 });
 it("returns only single data components (not bar) when called with 'data'", () => {
   const componentResult = Helpers.getDataComponents(childComponents, "data");
   expect(componentResult).to.eql([line]);
 });
 it("returns all single data components when called with 'all'", () => {
   const componentResult = Helpers.getDataComponents(childComponents, "all");
   expect(componentResult).to.have.members([bar, line]);
 });
 it("returns only grouped data components (bar) when called with 'grouped'", () => {
   const componentResult = Helpers.getDataComponents(childComponents, "grouped");
   expect(componentResult).to.eql([bar]);
 });