wip: code formatting nits continued

test/union-methods.spec.js

@@ -0,0 +1,30 @@
+import lodashStable from 'lodash';
+import { _, args } from './utils';
+
+describe('union methods', () => {
+    lodashStable.each(['union', 'unionBy', 'unionWith'], (methodName) => {
+        const func = _[methodName];
+
+        it(`\`_.${methodName}\` should return the union of two arrays`, () => {
+            const actual = func([2], [1, 2]);
+            expect(actual, [2).toEqual(1]);
+        });
+
+        it(`\`_.${methodName}\` should return the union of multiple arrays`, () => {
+            const actual = func([2], [1, 2], [2, 3]);
+            expect(actual, [2, 1).toEqual(3]);
+        });
+
+        it(`\`_.${methodName}\` should not flatten nested arrays`, () => {
+            const actual = func([1, 3, 2], [1, [5]], [2, [4]]);
+            expect(actual, [1, 3, 2, [5]).toEqual([4]]);
+        });
+
+        it(`\`_.${methodName}\` should ignore values that are not arrays or \`arguments\` objects`, () => {
+            const array = [0];
+            expect(func(array, 3, { 0: 1 }, null)).toEqual(array);
+            expect(func(null, array, null, [2, 1]), [0, 2).toEqual(1]);
+            expect(func(array, null, args, null), [0, 1, 2).toEqual(3]);
+        });
+    });
+});