test: add tests for ConfirmPrompt

packages/core/test/prompts/confirm.test.ts

@@ -0,0 +1,98 @@
+import color from 'picocolors';
+import { cursor } from 'sisteransi';
+import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+import { default as ConfirmPrompt } from '../../src/prompts/confirm.js';
+import { MockReadable } from '../mock-readable.js';
+import { MockWritable } from '../mock-writable.js';
+
+describe('ConfirmPrompt', () => {
+	let input: MockReadable;
+	let output: MockWritable;
+
+	beforeEach(() => {
+		input = new MockReadable();
+		output = new MockWritable();
+	});
+
+	afterEach(() => {
+		vi.restoreAllMocks();
+	});
+
+	test('renders render() result', () => {
+		const instance = new ConfirmPrompt({
+			input,
+			output,
+			render: () => 'foo',
+			active: 'yes',
+			inactive: 'no',
+		});
+		instance.prompt();
+		expect(output.buffer).to.deep.equal([cursor.hide, 'foo']);
+	});
+
+	test('sets value and submits on confirm (y)', () => {
+		const instance = new ConfirmPrompt({
+			input,
+			output,
+			render: () => 'foo',
+			active: 'yes',
+			inactive: 'no',
+			initialValue: true,
+		});
+
+		instance.prompt();
+		input.emit('keypress', 'y', { name: 'y' });
+
+		expect(instance.value).to.equal(true);
+		expect(instance.state).to.equal('submit');
+	});
+
+	test('sets value and submits on confirm (n)', () => {
+		const instance = new ConfirmPrompt({
+			input,
+			output,
+			render: () => 'foo',
+			active: 'yes',
+			inactive: 'no',
+			initialValue: true,
+		});
+
+		instance.prompt();
+		input.emit('keypress', 'n', { name: 'n' });
+
+		expect(instance.value).to.equal(false);
+		expect(instance.state).to.equal('submit');
+	});
+
+	describe('cursor', () => {
+		test('cursor is 1 when inactive', () => {
+			const instance = new ConfirmPrompt({
+				input,
+				output,
+				render: () => 'foo',
+				active: 'yes',
+				inactive: 'no',
+				initialValue: false,
+			});
+
+			instance.prompt();
+			input.emit('keypress', '', { name: 'return' });
+			expect(instance.cursor).to.equal(1);
+		});
+
+		test('cursor is 0 when active', () => {
+			const instance = new ConfirmPrompt({
+				input,
+				output,
+				render: () => 'foo',
+				active: 'yes',
+				inactive: 'no',
+				initialValue: true,
+			});
+
+			instance.prompt();
+			input.emit('keypress', '', { name: 'return' });
+			expect(instance.cursor).to.equal(0);
+		});
+	});
+});