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command.unknownCommand.test.js
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command.unknownCommand.test.js
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const commander = require('../');
describe('unknownCommand', () => {
// Optional. Use internal knowledge to suppress output to keep test output clean.
let writeErrorSpy;
beforeAll(() => {
writeErrorSpy = jest.spyOn(process.stderr, 'write').mockImplementation(() => { });
});
afterEach(() => {
writeErrorSpy.mockClear();
});
afterAll(() => {
writeErrorSpy.mockRestore();
});
test('when unknown argument in simple program then no error', () => {
const program = new commander.Command();
program.exitOverride();
expect(() => {
program.parse('node test.js unknown'.split(' '));
}).not.toThrow();
});
test('when unknown command but action handler taking arg then no error', () => {
const program = new commander.Command();
program
.exitOverride()
.command('sub');
program
.argument('[args...]')
.action(() => { });
expect(() => {
program.parse('node test.js unknown'.split(' '));
}).not.toThrow();
});
test('when unknown command but listener then no error', () => {
const program = new commander.Command();
program
.exitOverride()
.command('sub');
program
.on('command:*', () => { });
expect(() => {
program.parse('node test.js unknown'.split(' '));
}).not.toThrow();
});
test('when unknown command then error', () => {
const program = new commander.Command();
program
.exitOverride()
.command('sub');
let caughtErr;
try {
program.parse('node test.js unknown'.split(' '));
} catch (err) {
caughtErr = err;
}
expect(caughtErr.code).toBe('commander.unknownCommand');
});
test('when unknown command and unknown option then error is for unknown command', () => {
// The unknown command is more useful since the option is for an unknown command (and might be
// ok if the command had been correctly spelled, say).
const program = new commander.Command();
program
.exitOverride()
.command('sub');
let caughtErr;
try {
program.parse('node test.js sbu --silly'.split(' '));
} catch (err) {
caughtErr = err;
}
expect(caughtErr.code).toBe('commander.unknownCommand');
});
});