wip: migrate to bun

test/constant.spec.ts

@@ -0,0 +1,38 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { empties, _, falsey, stubTrue } from './utils';
+
+describe('constant', () => {
+    it('should create a function that returns `value`', () => {
+        const object = { a: 1 },
+            values = Array(2).concat(empties, true, 1, 'a'),
+            constant = _.constant(object);
+
+        const results = lodashStable.map(values, (value, index) => {
+            if (index < 2) {
+                return index ? constant.call({}) : constant();
+            }
+            return constant(value);
+        });
+
+        assert.ok(lodashStable.every(results, (result) => result === object));
+    });
+
+    it('should work with falsey values', () => {
+        const expected = lodashStable.map(falsey, stubTrue);
+
+        const actual = lodashStable.map(falsey, (value, index) => {
+            const constant = index ? _.constant(value) : _.constant(),
+                result = constant();
+
+            return result === value || (result !== result && value !== value);
+        });
+
+        assert.deepStrictEqual(actual, expected);
+    });
+
+    it('should return a wrapped value when chaining', () => {
+        const wrapped = _(true).constant();
+        assert.ok(wrapped instanceof _);
+    });
+});