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import { getNameInitial } from "../clients";
describe("getClientInitials", () => {
it("returns substring if one name provided", () => {
expect(getNameInitial("Alan")).toBe("A");
});
it("returns initials", () => {
expect(getNameInitial("John Doe")).toBe("J");
});
it("returns correct initials if many names provided", () => {
expect(getNameInitial("John Alan Doe")).toBe("J");
});
it("returns single initial if 1 letter provided", () => {
expect(getNameInitial("z")).toBe("Z");
});
it("trims trailing whitespace", () => {
expect(getNameInitial(" q ")).toBe("Q");
});
it('returns "?" if falsey value provided', () => {
expect(getNameInitial("")).toBe("?");
expect(getNameInitial(undefined)).toBe("?");
expect(getNameInitial(null)).toBe("?");
});
it('returns "?" when value is blank', () => {
expect(getNameInitial(" ")).toBe("?");
});
it("works with multibyte strings", () => {
expect(getNameInitial("😀")).toBe("😀");
// but doesn't work with emoji ZWJ sequences
expect(getNameInitial("👨👩👦")).toBe("👨");
});
});
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