wip: code formatting nits continued

test/matches.spec.js

@@ -0,0 +1,27 @@
+import lodashStable from 'lodash';
+import matches from '../src/matches';
+
+describe('matches', () => {
+    it('should not change behavior if `source` is modified', () => {
+        const sources = [{ a: { b: 2, c: 3 } }, { a: 1, b: 2 }, { a: 1 }];
+
+        lodashStable.each(sources, (source, index) => {
+            const object = lodashStable.cloneDeep(source);
+            const par = matches(source);
+
+            expect(par(object)).toBe(true);
+
+            if (index) {
+                source.a = 2;
+                source.b = 1;
+                source.c = 3;
+            } else {
+                source.a.b = 1;
+                source.a.c = 2;
+                source.a.d = 3;
+            }
+            expect(par(object)).toBe(true);
+            expect(par(source)).toBe(false);
+        });
+    });
+});