20 lines
482 B
TypeScript
20 lines
482 B
TypeScript
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import { describe, expect, it } from "vitest";
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export function cn(...classes: Array<string | false | null | undefined>): string {
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return classes.filter(Boolean).join(" ");
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}
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describe("cn", () => {
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it("joins truthy values", () => {
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expect(cn("a", "b", "c")).toBe("a b c");
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});
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it("drops falsy values", () => {
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expect(cn("a", false, null, undefined, "b")).toBe("a b");
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});
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it("returns empty string for no classes", () => {
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expect(cn()).toBe("");
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});
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});
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