40 lines
970 B
TypeScript
40 lines
970 B
TypeScript
// Copyright 2017-2022 @polkadot/util authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import { perf } from '../test/performance';
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import { stringUpperFirst } from '.';
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describe('stringUpperFirst', (): void => {
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it("uppers the first letter if it's a capital letter", (): void => {
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expect(
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stringUpperFirst('ABC')
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).toBe('ABC');
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});
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it("uppers the first letter if it's a lowercase letter", (): void => {
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expect(
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stringUpperFirst('abc')
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).toBe('Abc');
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});
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it("uppers the first letter if it's a lowercase letter (String)", (): void => {
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expect(
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stringUpperFirst(String('abc'))
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).toBe('Abc');
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});
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it('returns undefined as empty', (): void => {
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expect(
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stringUpperFirst()
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).toBe('');
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});
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it('returns null as empty', (): void => {
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expect(
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stringUpperFirst(null)
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).toBe('');
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});
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perf('stringUpperFirst', 1_000_000, [['helloWorldSomething']], stringUpperFirst);
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});
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