In this post we will examine the 2nd of 4 JavaScript Unit Testing frameworks... JSSpec.
Previous parts of this series...
In subsequent posts we will cover QUnit, and YUI Test.
I like this Unit Testing framework a lot more than JsUnit for the following reasons...
- As you can see from the screenshot below, it has a nice interactive Test Runner
- The testing API has an easy to read Fluent Interface (a.k.a. It reads like English)
- The project appears to still be active... the latest version was available on Sep 23, 2008
- The test files don't need to be hosted in a web server in order to run (unlike JsUnit).
Ok, ok, enough talk. Lets get down to using this framework...
I added functionality to the nasty Pig Latin JavaScript to not only translate words, but also sentences.*
*Note: Yet again, this code is not optimal and it will be refactored in a future post.
function EnglishToPigLatin() {
this.CONSONANTS = 'bcdfghjklmnpqrstvwxyz';
this.VOWELS = 'aeiou';
this.Translate = function(english, splitType) {
var translated = '';
console.log('English: ', english);
var words = english.split(/\s+/);
console.log('Split Words: ', words);
for (var i = 0; i < words.length; ++i) {
console.log('Word ', i, ': ', words[i]);
translated += this.TranslateWord(words[i]);
if (i+1 < words.length) translated += ' ';
}
console.log('Translated: ', translated);
console.log('----------');
return translated;
}
this.TranslateWord = function(english) {
/*const*/ var SYLLABLE = 'ay';
var pigLatin = '';
if (english != null && english.length > 0 &&
(this.VOWELS.indexOf(english[0].toLowerCase()) > -1 || this.CONSONANTS.indexOf(english[0].toLowerCase()) > -1 )) {
if (this.VOWELS.indexOf(english[0].toLowerCase()) > -1) {
pigLatin = english + SYLLABLE;
} else {
var preConsonants = '';
for (var i = 0; i < english.length; ++i) {
if (this.CONSONANTS.indexOf(english[i].toLowerCase()) > -1) {
preConsonants += english[i];
if (preConsonants.toLowerCase() == 'q' && i+1 < english.length && english[i+1].toLowerCase() == 'u') {
preConsonants += 'u';
i += 2;
break;
}
} else {
break;
}
}
pigLatin = english.substring(i) + preConsonants + SYLLABLE;
}
}
return pigLatin;
}
}
Like I said before, JSSpec provides a nicer Fluent Interface that makes the tests read more like English. The follow are several sets of Unit Tests to exercise the existing functionality, plus the new feature I added since the last post.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>JSSpec results</title>
<link rel="stylesheet" type="text/css" href="JSSpec.css" />
<script type="text/javascript" src="diff_match_patch.js"></script>
<script type="text/javascript" src="JSSpec.js"></script>
<script type="text/javascript" src="PigLatinBad.js"></script>
<script type="text/javascript">// <![CDATA[
describe('Invalid Arguments', {
before_each : function() { englishToPigLatin = new EnglishToPigLatin(); },
'Passing Null Should Return Blank': function() {
value_of(englishToPigLatin.TranslateWord(null)).should_be('');
},
'Passing Blank Should Return Blank': function() {
value_of(englishToPigLatin.TranslateWord('')).should_be('');
},
'Passing 1234567890 Should Return Blank': function() {
value_of(englishToPigLatin.TranslateWord('1234567890')).should_be('');
},
'Passing ~!@#$%^&*()_+ Should Return Blank': function() {
value_of(englishToPigLatin.TranslateWord('~!@#$%^&*()_+')).should_be('');
}
})
describe('Consonant Words', {
before_each : function() { englishToPigLatin = new EnglishToPigLatin(); },
'Passing Beast Should Return Eastbay': function() {
value_of(englishToPigLatin.TranslateWord('beast')).should_be('eastbay');
},
'Passing Dough Should Return Oughday': function() {
value_of(englishToPigLatin.TranslateWord('dough')).should_be('oughday');
},
'Passing happy Should Return appyhay': function() {
value_of(englishToPigLatin.TranslateWord('happy')).should_be('appyhay');
},
'Passing question Should Return estionquay': function() {
value_of(englishToPigLatin.TranslateWord('question')).should_be('estionquay');
},
'Passing star Should Return arstay': function() {
value_of(englishToPigLatin.TranslateWord('star')).should_be('arstay');
},
'Passing three Should Return eethray': function() {
value_of(englishToPigLatin.TranslateWord('three')).should_be('eethray');
}
})
describe('Vowel Words', {
before_each : function() { englishToPigLatin = new EnglishToPigLatin(); },
'apple Should Return appleay': function() {
value_of(englishToPigLatin.TranslateWord('apple')).should_be('appleay');
},
'elijah Should Return elijahay': function() {
value_of(englishToPigLatin.TranslateWord('elijah')).should_be('elijahay');
},
'igloo Should Return iglooay': function() {
value_of(englishToPigLatin.TranslateWord('igloo')).should_be('iglooay');
},
'octopus Should Return octopusay': function() {
value_of(englishToPigLatin.TranslateWord('octopus')).should_be('octopusay');
},
'umbrella Should Return umbrellaay': function() {
value_of(englishToPigLatin.TranslateWord('umbrella')).should_be('umbrellaay');
}
})
describe('Sentences', {
before_each : function() { englishToPigLatin = new EnglishToPigLatin(); },
"Passing 'hello' Should Return 'elloh'": function() {
value_of(englishToPigLatin.Translate('hello')).should_be('ellohay');
},
"Passing 'hello world' Should Return 'elloh orldw'": function() {
value_of(englishToPigLatin.Translate('hello world')).should_be('ellohay orldway');
},
"Passing 'hello world!' Should Return 'ellow orld!w'": function() {
value_of(englishToPigLatin.Translate('hello world!')).should_be('ellohay orld!way');
},
"Passing 'Hello World' Should Return 'elloH orldW'": function() {
value_of(englishToPigLatin.Translate('Hello World')).should_be('elloHay orldWay');
},
"Passing 'Hello World!' Should Return 'elloH orld!W'": function() {
value_of(englishToPigLatin.Translate('Hello World!')).should_be('elloHay orld!Way');
}
})
// ]]></script>
</head>
<body><div style="display:none;"><p>A</p><p>B</p></div></body>
</html>
There are other asserts that can be made that I didn't make use of in the above same. Here are some examples... (taken from the JSSpec Manual)
- value_of('Hello'.toLowerCase()).should_be('hello');
- value_of([1,2,3]).should_be([1,2,3]);
- value_of(new Date(1979,03,27)).should_be(new Date(1979,03,27));
- value_of([]).should_be_empty();
- value_of(1 == 1).should_be_true();
- value_of(1 != 1).should_be_false();
- value_of("Hello").should_have(5, "characters");
- value_of([1,2,3]).should_have(3, "items")
- value_of({name:'Alan Kang', email:'jania902@gmail.com', accounts:['A', 'B']}).should_have(2, "accounts");
- value_of([1,2,3]).should_have_exactly(3, "items");
- value_of([1,2,3]).should_have_at_least(2, "items");
- value_of([1,2,3]).should_have_at_most(4, "items");
- value_of([1,2,3]).should_include(2);
- value_of([1,2,3]).should_not_includ
- value_of({a: 1, b: 2}).should_include("a");
- value_of({a: 1, b: 2}).should_not_include("c");
As you can see, this is a very powerful easy to read and execute testing framework. Of those frameworks I have tested thus far, I recommend it above the others (at this point I've only covered JsUnit).
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Unit Testing
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