minify/tests/js/JSTest.php

<?php

use MatthiasMullie\Minify;

/**
 * JS minifier test case.
 */
class JSTest extends PHPUnit_Framework_TestCase
{
    /**
     * @var Minify\JS
     */
    private $minifier;

    /**
     * Prepares the environment before running a test.
     */
    protected function setUp()
    {
        parent::setUp();
        $this->minifier = new Minify\JS();
    }

    /**
     * Cleans up the environment after running a test.
     */
    protected function tearDown()
    {
        $this->minifier = null;
        parent::tearDown();
    }

    /**
     * Test JS minifier rules, provided by dataProvider
     *
     * @test
     * @dataProvider dataProvider
     */
    public function minify($input, $expected)
    {
        $this->minifier->add($input);
        $result = $this->minifier->minify();

        $this->assertEquals($expected, $result);
    }

    /**
     * @return array [input, expected result]
     */
    public function dataProvider()
    {
        $tests = array();

        // escaped quotes should not terminate string
        $tests[] = array(
            'alert("Escaped quote which is same as string quotes: \"; should not match")',
            'alert("Escaped quote which is same as string quotes: \"; should not match")',
        );

        // regex delimiters need to be treated as strings
        // (two forward slashes could look like a comment)
        $tests[] = array(
            '/abc\/def\//.test("abc")',
            '/abc\/def\//.test("abc")',
        );
        $tests[] = array(
            'var a = /abc\/def\//.test("abc")',
            'var a=/abc\/def\//.test("abc")',
        );

        // don't confuse multiple slashes for regexes
        $tests[] = array(
            'a = b / c; d = e / f',
            'a=b/c;d=e/f',
        );

        // mixture of quotes starting in comment/regex, to make sure strings are
        // matched correctly, not inside comment/regex.
        $tests[] = array(
            '/abc"def/.test("abc")',
            '/abc"def/.test("abc")',
        );
        $tests[] = array(
            '/* Bogus " */var test="test";',
            'var test="test"',
        );

        // replace comments
        $tests[] = array(
            '/* This is a JS comment */',
            '',
        );

        // make sure no ; is added in places it shouldn't
        $tests[] = array(
            'if(true){}else{}',
            'if(true){}else{}',
        );
        $tests[] = array(
            'do{i++}while(i<1)',
            'do{i++}while(i<1)',
        );

        $tests[] = array(
            'if(true)statement;else statement',
            'if(true)statement;else statement',
        );

        $tests[] = array(
            'for (i = 0; (i < 10); i++) statement',
            'for(i=0;(i<10);i++)statement',
        );
        $tests[] = array(
            '-1
             +2',
            '-1+2',
        );
        $tests[] = array(
            '-1+
             2',
            '-1+2',
        );
        $tests[] = array(
            'alert("this is a test");',
            'alert("this is a test")',
        );

        // test where newline should be preserved (for ASI) or semicolon added
        $tests[] = array(
            'function(){console.log("this is a test");}',
            'function(){console.log("this is a test")}',
        );
        $tests[] = array(
            'alert("this is a test")
alert("this is another test")',
            'alert("this is a test")
alert("this is another test")',
        );
        $tests[] = array(
            'a=b+c
             d=e+f',
            'a=b+c
d=e+f',
        );
        $tests[] = array(
            'a++

             ++b',
            'a++
++b',
        );
        $tests[] = array(
            '!a
             !b',
            '!a
!b',
        );
        $tests[] = array(
            // don't confuse with 'if'
            'digestif
            (true)
            statement',
            'digestif(true)
statement',
        );
        $tests[] = array(
            'if
             (
                 (
                     true
                 )
                 &&
                 (
                     true
                 )
            )
            statement',
            'if((true)&&(true))
statement',
        );
        $tests[] = array(
            'if
             (
                 true
             )
             {
             }
             else
             {
             }',
            'if(true){}
else{}',
        );
        $tests[] = array(
            'do
             {
                 i++
             }
             while
             (
                 i<1
             )',
            'do{i++}
while(i<1)',
        );
        $tests[] = array(
            'if ( true )
                 statement
             else
                 statement',
            'if(true)
statement
else statement',
        );

        // test if whitespace around keywords is properly collapsed
        $tests[] = array(
            'var
             variable
             =
             "value";',
            'var variable="value"',
        );
        $tests[] = array(
            'var variable = {
                 test:
                 {
                 }
             }',
            'var variable={test:{}}',
        );
        $tests[] = array(
            'if ( true ) {
             } else {
             }',
            'if(true){}else{}',
        );
        $tests[] = array(
            '53  instanceof  String',
            '53 instanceof String'
        );

        // remove whitespace around operators
        $tests[] = array(
            'a = 1 + 2',
            'a=1+2',
        );
        $tests[] = array(
            'object  .  property',
            'object.property',
        );
        $tests[] = array(
            'object
                .property',
            'object.property',
        );
        $tests[] = array(
            'alert ( "this is a test" );',
            'alert("this is a test")',
        );

        // mix of ++ and +: three consecutive +es will be interpreted as ++ +
        $tests[] = array(
            'a++ +b',
            'a++ +b',
        );
        $tests[] = array(
            'a+ ++b',
            'a+ ++b', // +++ would actually be allowed as well
        );

        // SyntaxError: identifier starts immediately after numeric literal
        $tests[] = array(
            '42 .toString()',
            '42 .toString()',
        );

        // add comment in between whitespace that needs to be stripped
        $tests[] = array(
            'object
                // haha, some comment, just to make things harder!
                .property',
            'object.property',
        );

        // random bits of code that tripped errors during development
        $tests[] = array(
            '
                // check if it isn\'t a text-element
                if(currentElement.attr(\'type\') != \'text\')
                {
                    // remove the current one
                    currentElement.remove();
                }

                // already a text element
                else newElement = currentElement;
',
            'if(currentElement.attr(\'type\')!=\'text\'){currentElement.remove()}
else newElement=currentElement',
        );
        $tests[] = array(
            'var jsBackend =
             {
                 debug: false,
                 current: {}
             }',
            'var jsBackend={debug:false,current:{}}',
        );
        $tests[] = array(
            'var utils =
             {
                 debug: false
             }
             utils.array =
             {
             }',
            'var utils={debug:false}
utils.array={}',
        );
        $tests[] = array(
            'rescape = /\'|\\\\/g,

            // blablabla here was some more code but the point was that somewhere
            // down below, there would be a closing quote which would cause the
            // regex (confused for escaped closing tag) not to be recognized,
            // taking the opening single quote & looking for a string.
            // So here\'s <-- the closing quote
            runescape = \'blabla\'',
            'rescape=/\'|\\\\/g,runescape=\'blabla\'',
        );
        $tests[] = array(
            'var rsingleTag = (/^<(\w+)\s*\/?>(?:<\/\1>|)$/)',
            'var rsingleTag=(/^<(\w+)\s*\/?>(?:<\/\1>|)$/)',
        );

        // replace associative array key references by property notation
        $tests[] = array(
            'array["key"][\'key2\']',
            'array.key.key2',
        );
        $tests[] = array(
            'array[ "key" ][ \'key2\' ]',
            'array.key.key2',
        );

        // https://github.com/matthiasmullie/minify/issues/10
        $tests[] = array(
            '// first mutation patch
// second mutation patch
// third mutation patch
// fourth mutation patch',
            '',
        );
        $tests[] = array(
            '/////////////////////////
// first mutation patch
// second mutation patch
// third mutation patch
// fourth mutation patch
/////////////////////////',
            '',
        );

        // https://github.com/matthiasmullie/minify/issues/14
        $tests[] = array(
            'function foo (a, b)
{
    return a / b;
}
function foo (a, b)
{
    return a / b;
}',
            'function foo(a,b){return a/b}
function foo(a,b){return a/b}',
        );

        // https://github.com/matthiasmullie/minify/issues/15
        $tests[] = array(
            'if ( !data.success )
    deferred.reject(); else
    deferred.resolve(data);',
            'if(!data.success)
deferred.reject();else deferred.resolve(data)',
        );
        $tests[] = array(
            "if ( typeof jQuery === 'undefined' )
    throw new Error('.editManager.js: jQuery is required and must be loaded first');",
            "if(typeof jQuery==='undefined')
throw new Error('.editManager.js: jQuery is required and must be loaded first')",
        );

        // https://github.com/matthiasmullie/minify/issues/27
        $tests[] = array(
            '$.expr[":"]',
            '$.expr[":"]',
        );

        return $tests;
    }
}