wip: migrate to bun

test/sum-methods.spec.ts

@@ -0,0 +1,34 @@
+import assert from 'node:assert';
+import lodashStable from 'lodash';
+import { _, empties, stubZero } from './utils';
+
+describe('sum methods', () => {
+    lodashStable.each(['sum', 'sumBy'], (methodName) => {
+        const array = [6, 4, 2],
+            func = _[methodName];
+
+        it(`\`_.${methodName}\` should return the sum of an array of numbers`, () => {
+            assert.strictEqual(func(array), 12);
+        });
+
+        it(`\`_.${methodName}\` should return \`0\` when passing empty \`array\` values`, () => {
+            const expected = lodashStable.map(empties, stubZero);
+
+            const actual = lodashStable.map(empties, (value) => func(value));
+
+            assert.deepStrictEqual(actual, expected);
+        });
+
+        it(`\`_.${methodName}\` should skip \`undefined\` values`, () => {
+            assert.strictEqual(func([1, undefined]), 1);
+        });
+
+        it(`\`_.${methodName}\` should not skip \`NaN\` values`, () => {
+            assert.deepStrictEqual(func([1, NaN]), NaN);
+        });
+
+        it(`\`_.${methodName}\` should not coerce values to numbers`, () => {
+            assert.strictEqual(func(['1', '2']), '12');
+        });
+    });
+});