React trainee

react/ecmascript/01 - spread/index.js

@@ -1,8 +1,17 @@
 import { isArray } from './utils';
 
 export function min() {
-  isArray();
-  return Math.min();
+  if (arguments === 1) {
+    return arguments[0];
+  } else if (arguments.length === 0) {
+    return undefined;
+  }
+  let [args] = arguments;
+  if (isArray(args) === true) {
+    return Math.min(...args);
+  } else {
+    return Math.min(...arguments);
+  }
 }
 
 export function copy() {

react/ecmascript/01 - spread/test.js

@@ -1,19 +1,19 @@
 import { min, copy, reverseMerge, filterAttribs } from '.';
 
 describe('Spread operator', () => {
-  xit('min returns the param if is the only argument', () => {
+  it('min returns the param if is the only argument', () => {
     expect(min(1)).toBe(1);
     expect(min(2)).toBe(2);
   });
-  xit('min can return the minimum based on a list', () => {
+  it('min can return the minimum based on a list', () => {
     expect(min([1, 2])).toBe(1);
     expect(min([2, 1])).toBe(1);
   });
-  xit('min can return the minimum based on many parameters', () => {
+  it('min can return the minimum based on many parameters', () => {
     expect(min(1, 2, 3, 4, 5, 0)).toBe(0);
     expect(min(1, 2, 3, 4, -1, 0)).toBe(-1);
   });
-  xit('min returns undefined on no args', () => {
+  it('min returns undefined on no args', () => {
     expect(min()).toBe(undefined);
   });
   xit('copy can copy objects', () => {