wip: migrate to bun

test/isInteger-methods.spec.ts

@@ -0,0 +1,49 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { _, stubTrue, MAX_INTEGER, stubFalse, falsey, args, symbol } from './utils';
+
+describe('isInteger methods', () => {
+    lodashStable.each(['isInteger', 'isSafeInteger'], (methodName) => {
+        const func = _[methodName],
+            isSafe = methodName == 'isSafeInteger';
+
+        it(`\`_.${methodName}\` should return \`true\` for integer values`, () => {
+            const values = [-1, 0, 1],
+                expected = lodashStable.map(values, stubTrue);
+
+            const actual = lodashStable.map(values, (value) => func(value));
+
+            assert.deepStrictEqual(actual, expected);
+            assert.strictEqual(func(MAX_INTEGER), !isSafe);
+        });
+
+        it('should return `false` for non-integer number values', () => {
+            const values = [NaN, Infinity, -Infinity, Object(1), 3.14],
+                expected = lodashStable.map(values, stubFalse);
+
+            const actual = lodashStable.map(values, (value) => func(value));
+
+            assert.deepStrictEqual(actual, expected);
+        });
+
+        it('should return `false` for non-numeric values', () => {
+            const expected = lodashStable.map(falsey, (value) => value === 0);
+
+            const actual = lodashStable.map(falsey, (value, index) =>
+                index ? func(value) : func(),
+            );
+
+            assert.deepStrictEqual(actual, expected);
+
+            assert.strictEqual(func(args), false);
+            assert.strictEqual(func([1, 2, 3]), false);
+            assert.strictEqual(func(true), false);
+            assert.strictEqual(func(new Date()), false);
+            assert.strictEqual(func(new Error()), false);
+            assert.strictEqual(func({ a: 1 }), false);
+            assert.strictEqual(func(/x/), false);
+            assert.strictEqual(func('a'), false);
+            assert.strictEqual(func(symbol), false);
+        });
+    });
+});