minify/tests/JsClosureCompilerTest.php

<?php

class JsClosureCompilerTest extends PHPUnit_Framework_TestCase
{
    public function test1()
    {
        $src = "
    (function (window, undefined){
        function addOne(input) {
            return 1 + input;
        }
        window.addOne = addOne;
        window.undefined = undefined;
    })(window);
        ";
        $minExpected = "(function(a,b){a.addOne=function(a){return 1+a};a.undefined=b})(window);";
        $minOutput = $this->compile($src);

        $this->assertSame($minExpected, $minOutput, 'Minify_JS_ClosureCompiler : Overall');
    }

    public function test2()
    {
        $src = "function blah({ return 'blah';} ";
        $e = null;
        try {
            $this->compile($src);
        } catch (Minify_JS_ClosureCompiler_Exception $e) {
        }
        $this->assertInstanceOf('Minify_JS_ClosureCompiler_Exception', $e, 'Throws Minify_JS_ClosureCompiler_Exception');
    }

    // Test maximum byte size check (default)
    public function test3()
    {
        $fn = "(function() {})();";
        $src = str_repeat($fn, ceil(Minify_JS_ClosureCompiler::DEFAULT_MAX_BYTES / strlen($fn)));
        $e = null;
        try {
            $this->compile($src);
        } catch (Minify_JS_ClosureCompiler_Exception $e) {
        }
        $this->assertInstanceOf('Minify_JS_ClosureCompiler_Exception', $e, 'Throws Minify_JS_ClosureCompiler_Exception');

        $expected = 'POST content larger than ' . Minify_JS_ClosureCompiler::DEFAULT_MAX_BYTES . ' bytes';
        $this->assertEquals($expected, $e->getMessage(), 'Message must tell how big maximum byte size is');
    }

    // Test maximum byte size check (no limit)
    public function test4()
    {
        $src = "(function(){})();";
        $minOutput = $this->compile($src, array(
            Minify_JS_ClosureCompiler::OPTION_MAX_BYTES => 0
        ));

        $this->assertSame($src, $minOutput, 'With no limit set,  it should compile properly');
    }

    // Test maximum byte size check (custom)
    public function test5()
    {
        $src = "(function() {})();";
        $allowedBytes = 5;
        $e = null;
        try {
            $this->compile($src, array(
                Minify_JS_ClosureCompiler::OPTION_MAX_BYTES => $allowedBytes
            ));
        } catch (Minify_JS_ClosureCompiler_Exception $e) {
        }
        $this->assertInstanceOf('Minify_JS_ClosureCompiler_Exception', $e, 'Throws Minify_JS_ClosureCompiler_Exception');

        $expected = 'POST content larger than ' . $allowedBytes . ' bytes';
        $this->assertEquals($expected, $e->getMessage(), 'Message must tell how big maximum byte size is');
    }

    // Test additional options passed to HTTP request
    public function test6()
    {
        $ecmascript5 = "[1,].length;";
        $e = null;
        try {
            $this->compile($ecmascript5);
        } catch (Minify_JS_ClosureCompiler_Exception $e) {
        }
        $this->assertInstanceOf('Minify_JS_ClosureCompiler_Exception', $e, 'Throws Minify_JS_ClosureCompiler_Exception');
    }

    public function test7()
    {
        $ecmascript5 = "[1,].length;";

        $minExpected = '1;';
        $minOutput = $this->compile($ecmascript5, array(
            Minify_JS_ClosureCompiler::OPTION_ADDITIONAL_OPTIONS => array(
                'language' => 'ECMASCRIPT5'
            )
        ));
        $this->assertSame($minExpected, $minOutput, 'Language option should make it compile');
    }

    /**
     * Call closure compiler, but intercept API limit errors.
     *
     * @param string $script
     * @param array $options
     * @return string
     */
    private function compile($script, $options = array())
    {
        $result = Minify_JS_ClosureCompiler::minify($script, $options);

        // output may contain an error message, and original source:
        // /* Received errors from Closure Compiler API:
        // Error(22): Too many compiles performed recently.  Try again later.
        // (Using fallback minifier)
        // */
        // (function(window,undefined){function addOne(input){return 1+input;}
        // window.addOne=addOne;window.undefined=undefined;})(window);

        $this->assertNotContains('Error(22): Too many compiles', $result);

        return $result;
    }
}