bug #775 Fix the support of legacy scssphp formatters (stof)

This PR was merged into the 1.4-dev branch.

Discussion
----------

Fix the support of legacy scssphp formatters

Scssphp 0.5 removed the deprecated classes. But as there was no warning, people might not be aware that they were using a deprecated class.
This keeps support for the deprecated formatters in Assetic by matching them to their replacement, and warns the user about it.

Commits
-------

b422ec4 Update the scssphp tests to be less strict about formatting
d6641a5 Fix the support of legacy scssphp formatters

src/Assetic/Filter/ScssphpFilter.php

@@ -45,6 +45,19 @@ public function isCompassEnabled()
 
     public function setFormatter($formatter)
     {
+        $legacyFormatters = array(
+            'scss_formatter' => 'Leafo\ScssPhp\Formatter\Expanded',
+            'scss_formatter_nested' => 'Leafo\ScssPhp\Formatter\Nested',
+            'scss_formatter_compressed' => 'Leafo\ScssPhp\Formatter\Compressed',
+            'scss_formatter_crunched' => 'Leafo\ScssPhp\Formatter\Crunched',
+        );
+
+        if (isset($legacyFormatters[$formatter])) {
+            @trigger_error(sprintf('The scssphp formatter `%s` is deprecated. Use `%s` instead.', $formatter, $legacyFormatters[$formatter]), E_USER_DEPRECATED);
+
+            $formatter = $legacyFormatters[$formatter];
+        }
+
         $this->formatter = $formatter;
     }
 

tests/Assetic/Test/Filter/ScssphpFilterTest.php

@@ -91,8 +91,8 @@ public function testCompassExtensionCanBeEnabled()
     public function testCompassExtensionCanBeDisabled()
     {
         $this->setExpectedExceptionRegExp(
-            "Exception",
-            "/Undefined mixin box\-shadow\: failed at `@include box\-shadow\(10px 10px 8px red\);`.*? line 4/"
+            'Exception',
+            '/Undefined mixin box\-shadow\: failed at `@include box\-shadow\(10px 10px 8px red\);`.*? line:? 4/'
         );
 
         $asset = new FileAsset(__DIR__.'/fixtures/sass/main_compass.scss');
@@ -110,7 +110,7 @@ public function testSetImportPath()
         $asset->load();
         $filter->filterLoad($asset);
 
-        $this->assertEquals("#test {\n  color: red; }\n", $asset->getContent(), 'Import paths are correctly used');
+        $this->assertContains('color: red', $asset->getContent(), 'Import paths are correctly used');
     }
 
     public function testRegisterFunction()
@@ -122,11 +122,7 @@ public function testRegisterFunction()
         $filter->registerFunction('bar',function () { return 'red';});
         $filter->filterLoad($asset);
 
-        $expected = new StringAsset('.foo{ color: red;}');
-        $expected->load();
-        $filter->filterLoad($expected);
-
-        $this->assertEquals($expected->getContent(), $asset->getContent(), 'custom function can be registered');
+        $this->assertContains('color: red', $asset->getContent(), 'custom function can be registered');
     }
 
     public function testSetFormatter()
@@ -135,14 +131,30 @@ public function testSetFormatter()
         $actual->load();
 
         $filter = $this->getFilter();
-        $filter->setFormatter("scss_formatter_compressed");
+        $filter->setFormatter('Leafo\ScssPhp\Formatter\Compressed');
         $filter->filterLoad($actual);
 
-        $expected = new StringAsset('.foo{color:#fff}');
-        $expected->load();
+        $this->assertRegExp(
+            '/^\.foo{color:#fff;?}$/',
+            $actual->getContent(),
+            'scss_formatter can be changed'
+        );
+    }
 
-        $this->assertEquals(
-            $expected->getContent(),
+    /**
+     * @group legacy
+     */
+    public function testSetFormatterWithLegacyName()
+    {
+        $actual = new StringAsset(".foo {\n  color: #fff;\n}");
+        $actual->load();
+
+        $filter = $this->getFilter();
+        $filter->setFormatter('scss_formatter_compressed');
+        $filter->filterLoad($actual);
+
+        $this->assertRegExp(
+            '/^\.foo{color:#fff;?}$/',
             $actual->getContent(),
             'scss_formatter can be changed'
         );
@@ -179,7 +191,7 @@ public function testSetVariables()
         $asset->load();
         $filter->filterLoad($asset);
 
-        $this->assertEquals("#test {\n  color: red; }\n", $asset->getContent(), "Variables can be added");
+        $this->assertContains('color: red', $asset->getContent(), 'Variables can be added');
     }
 
     // private