test(prompt): add basic input test

Author: armano2

@commitlint/prompt/src/input.test.ts

@@ -0,0 +1,104 @@
+import {Answers, PromptModule, QuestionCollection} from 'inquirer';
+import input from './input';
+import InputCustomPrompt from './inquirer/InputCustomPrompt';
+import chalk from 'chalk';
+
+jest.mock(
+	'@commitlint/load',
+	() => {
+		return () => require('@commitlint/config-angular');
+	},
+	{
+		virtual: true,
+	}
+);
+
+test('should work with all fields filled', async () => {
+	const prompt = stub({
+		'input-custom': {
+			type: 'fix',
+			scope: 'test',
+			subject: 'subject',
+			body: 'body',
+			footer: 'footer',
+		},
+	});
+	const message = await input(prompt);
+	expect(message).toEqual('fix(test): subject\n' + 'body\n' + 'footer');
+});
+
+test('should work without scope', async () => {
+	const prompt = stub({
+		'input-custom': {
+			type: 'fix',
+			scope: '',
+			subject: 'subject',
+			body: 'body',
+			footer: 'footer',
+		},
+	});
+	const message = await input(prompt);
+	expect(message).toEqual('fix: subject\n' + 'body\n' + 'footer');
+});
+
+test('should fail without type', async () => {
+	const spy = jest.spyOn(console, 'error').mockImplementation();
+	const prompt = stub({
+		'input-custom': {
+			type: '',
+			scope: '',
+			subject: '',
+			body: '',
+			footer: '',
+		},
+	});
+	const message = await input(prompt);
+	expect(message).toEqual('');
+	expect(console.error).toHaveBeenCalledTimes(1);
+	expect(console.error).toHaveBeenLastCalledWith(
+		new Error(`⚠ ${chalk.bold('type')} may not be empty.`)
+	);
+	spy.mockRestore();
+});
+
+function stub(config: Record<string, Record<string, unknown>>): PromptModule {
+	const prompt = async (questions: QuestionCollection): Promise<any> => {
+		const result: Answers = {};
+		const resolvedConfig = Array.isArray(questions) ? questions : [questions];
+		for (const promptConfig of resolvedConfig) {
+			const configType = promptConfig.type || 'input';
+			const questions = config[configType];
+			if (!questions) {
+				throw new Error(`Unexpected config type: ${configType}`);
+			}
+			const answer = questions[promptConfig.name!];
+			if (answer == null) {
+				throw new Error(`Unexpected config name: ${promptConfig.name}`);
+			}
+			let validate = promptConfig.validate;
+			if (promptConfig.type === 'input-custom') {
+				const customInput = new InputCustomPrompt(
+					promptConfig,
+					{write: () => true} as any,
+					result
+				) as any;
+				validate = customInput.opt.validate.bind(customInput);
+			}
+			if (validate) {
+				const validationResult = validate(answer, result);
+				if (validationResult !== true) {
+					throw new Error(validationResult || undefined);
+				}
+			}
+
+			result[promptConfig.name!] = answer;
+		}
+		return result;
+	};
+	prompt.registerPrompt = () => {
+		return prompt;
+	};
+	prompt.restoreDefaultPrompts = () => true;
+	prompt.prompts = {};
+	return (prompt as any) as PromptModule;
+}