fix: duplicated items when children count is 1

__tests__/regression/fix-1813.test.js

@@ -12,7 +12,6 @@ import {
   getButtons,
   getButtonsLength,
   getClonesCount,
-  getCurrentSlide,
   getSlidesCount
 } from "../../test-utils";
 import { GenericSliderComponent } from "../TestComponents";
@@ -28,13 +27,29 @@ function MultipleItems() {
   return <GenericSliderComponent slidesCount={9} settings={settings} />;
 }
 
+function SingleItem() {
+  const settings = {
+    dots: true,
+    infinite: true,
+    speed: 500,
+    slidesToShow: 1
+  };
+  return <GenericSliderComponent slidesCount={1} settings={settings} />;
+}
+
 describe("Multiple Items with slidesToShow = slides count in infinite mode", function () {
   it("should have 9 actual slides and (9(pre) + 9(post)) clone slides", function () {
     //Todo: Need to fix extra clones
     const { container } = render(<MultipleItems />);
     expect(getSlidesCount(container)).toEqual(27);
     expect(getClonesCount(container)).toEqual(18);
   });
+  // https://github.com/akiran/react-slick/issues/2359
+  it("should not have cloned slide", function () {
+    const { container } = render(<SingleItem />);
+    expect(getSlidesCount(container)).toEqual(1);
+    expect(getClonesCount(container)).toEqual(0);
+  });
   it("should have 9 active slides", function () {
     const { container } = render(<MultipleItems />);
     expect(getActiveSlidesCount(container)).toEqual(9);

src/track.js

@@ -136,7 +136,12 @@ const renderSlides = (spec) => {
     );
 
     // if slide needs to be precloned or postcloned
-    if (spec.infinite && spec.fade === false && !spec.unslick) {
+    if (
+      spec.infinite &&
+      childrenCount > 1 &&
+      spec.fade === false &&
+      !spec.unslick
+    ) {
       let preCloneNo = childrenCount - index;
       if (preCloneNo <= getPreClones(spec)) {
         key = -preCloneNo;