wip: migrate to bun

test/dropRight.spec.ts

@@ -0,0 +1,73 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { falsey, LARGE_ARRAY_SIZE, isEven } from './utils';
+import dropRight from '../src/dropRight';
+
+describe('dropRight', () => {
+    const array = [1, 2, 3];
+
+    it('should drop the last two elements', () => {
+        assert.deepStrictEqual(dropRight(array, 2), [1]);
+    });
+
+    it('should treat falsey `n` values, except `undefined`, as `0`', () => {
+        const expected = lodashStable.map(falsey, (value) =>
+            value === undefined ? [1, 2] : array,
+        );
+
+        const actual = lodashStable.map(falsey, (n) => dropRight(array, n));
+
+        assert.deepStrictEqual(actual, expected);
+    });
+
+    it('should return all elements when `n` < `1`', () => {
+        lodashStable.each([0, -1, -Infinity], (n) => {
+            assert.deepStrictEqual(dropRight(array, n), array);
+        });
+    });
+
+    it('should return an empty array when `n` >= `length`', () => {
+        lodashStable.each([3, 4, 2 ** 32, Infinity], (n) => {
+            assert.deepStrictEqual(dropRight(array, n), []);
+        });
+    });
+
+    it('should coerce `n` to an integer', () => {
+        assert.deepStrictEqual(dropRight(array, 1.6), [1, 2]);
+    });
+
+    it('should work in a lazy sequence', () => {
+        var array = lodashStable.range(1, LARGE_ARRAY_SIZE + 1),
+            predicate = function (value) {
+                values.push(value);
+                return isEven(value);
+            },
+            values = [],
+            actual = _(array).dropRight(2).dropRight().value();
+
+        assert.deepEqual(actual, array.slice(0, -3));
+
+        actual = _(array).filter(predicate).dropRight(2).dropRight().value();
+        assert.deepEqual(values, array);
+        assert.deepEqual(actual, dropRight(dropRight(_.filter(array, predicate), 2)));
+
+        actual = _(array).dropRight(2).drop().dropRight().drop(2).value();
+        assert.deepEqual(actual, _.drop(dropRight(_.drop(dropRight(array, 2))), 2));
+
+        values = [];
+
+        actual = _(array)
+            .dropRight()
+            .filter(predicate)
+            .dropRight(2)
+            .drop()
+            .dropRight()
+            .drop(2)
+            .value();
+        assert.deepEqual(values, array.slice(0, -1));
+        assert.deepEqual(
+            actual,
+            _.drop(dropRight(_.drop(dropRight(_.filter(dropRight(array), predicate), 2))), 2),
+        );
+    });
+});