Exercise Solutions: Unit Testing¶

Get the sourcecode file and the test code file to talk to each other.

1. Add two require statements.

   checkFive.spec.js:

   1const test = require('../checkFive.js');
   2const assert = require('assert');
   

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Check that checkFive produces the correct output when passed a number less than 5.

1. Write a descriptive test name.

   checkFive.spec.js:

   1it("returns 'num is less than 5' when num < 5.", function(){
   2   // test code //
   3});
   

3. Use assert.

   checkFive.spec.js:

   assert.strictEqual(output, "2 is less than 5.");
   

5. Change the sourcecode file and see that the test fails.

   checkFive.js:

   1if (num > 5) {
   2   // sourcecode //
   3}
   

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Set up the RPS.js and RPS.spec.js files to talk to each other.

RPS.js:

1module.exports = {
2      whoWon: whoWon
3};

RPS.spec.js:

1const test = require('../RPS.js');
2const assert = require('assert');

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Two sample tests.

RPS.spec.js:

 1describe("whoWon", function(){
 2
 3   it("returns 'Player 2 wins!' if P1 = rock & P2 = paper", function(){
 4      let output = test.whoWon('rock','paper');
 5      assert.strictEqual(output, "Player 2 wins!");
 6   });
 7
 8   it("returns 'Player 2 wins!' if P1 = paper & P2 = scissors", function(){
 9      let output = test.whoWon('paper','scissors');
10      assert.strictEqual(output, "Player 2 wins!");
11   });
12
13   // other test cases //
14
15}