port MinifyClosureCompilerTest to phpunit

tests/MinifyClosureCompilerTest.php

@@ -0,0 +1,72 @@
+<?php
+
+class MinifyClosureCompilerTest extends TestCase
+{
+    public static function setupBeforeClass()
+    {
+        parent::setupBeforeClass();
+        Minify_ClosureCompiler::$isDebug = true;
+
+        // To test more functionality, download a compiler.jar from
+        // https://code.google.com/p/closure-compiler/wiki/BinaryDownloads,
+        // put it under tests dir as 'compiler.jar'
+
+        // set minimum necessary settings
+        Minify_ClosureCompiler::$jarFile = __DIR__ . DIRECTORY_SEPARATOR . 'compiler.jar';
+        Minify_ClosureCompiler::$tempDir = sys_get_temp_dir();
+    }
+
+    /*
+     * Test minification w/o setting the necessary settings
+     */
+    public function test1()
+    {
+        Minify_ClosureCompiler::$jarFile = null;
+        Minify_ClosureCompiler::$tempDir = null;
+        try {
+            Minify_ClosureCompiler::minify('');
+            $this->fail();
+        } catch (Exception $e) {
+            $this->assertInstanceOf('Minify_ClosureCompiler_Exception', $e);
+        }
+    }
+
+    /**
+     * Test minification with the minimum necessary settings
+     */
+    public function test2()
+    {
+        $this->assertHasCompilerJar();
+        $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);";
+        $minOutput = Minify_ClosureCompiler::minify($src);
+        $this->assertSame($minExpected, $minOutput, 'minimum necessary settings');
+    }
+
+    /**
+     * Test minification with advanced compilation level
+     */
+    public function test3()
+    {
+        $this->assertHasCompilerJar();
+        $src = "function unused() {};";
+        $minExpected = '';
+        $minOutput = Minify_ClosureCompiler::minify($src, array(
+            Minify_ClosureCompiler::OPTION_COMPILATION_LEVEL => 'ADVANCED_OPTIMIZATIONS'
+        ));
+        $this->assertSame($minExpected, $minOutput, 'advanced optimizations');
+    }
+
+    protected function assertHasCompilerJar()
+    {
+        $this->assertFileExists(Minify_ClosureCompiler::$jarFile, "Have closure compiler compiler.jar");
+    }
+}