"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
const ts = __importStar(require("typescript"));
describe('Arrow function return type detection (Unit 1.3.1)', () => {
    function countMissingReturnTypes(source) {
        const sourceFile = ts.createSourceFile('test.ts', source, ts.ScriptTarget.Latest, true);
        let missing = 0;
        function visit(node) {
            const isFunc = ts.isFunctionDeclaration(node) ||
                ts.isFunctionExpression(node) ||
                ts.isArrowFunction(node) ||
                ts.isMethodDeclaration(node);
            if (isFunc) {
                const hasReturnType = node.type !== undefined;
                if (!hasReturnType)
                    missing++;
            }
            ts.forEachChild(node, visit);
        }
        visit(sourceFile);
        return missing;
    }
    test('arrow function without return type is detected', () => {
        const code = 'const fn = (x: number) => x + 1;';
        expect(countMissingReturnTypes(code)).toBe(1);
    });
    test('arrow function with return type is NOT counted as missing', () => {
        const code = 'const fn = (x: number): number => x + 1;';
        expect(countMissingReturnTypes(code)).toBe(0);
    });
    test('function expression without return type is detected', () => {
        const code = 'const fn = function(x) { return x; };';
        expect(countMissingReturnTypes(code)).toBe(1);
    });
    test('mixed: function declaration with type, arrow without — only arrow counted', () => {
        const code = [
            'function withType(): string { return "hi"; }',
            'const without = (x) => x;',
        ].join('\n');
        expect(countMissingReturnTypes(code)).toBe(1);
    });
});
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