From 1e9493df294705a61410b5e1a35ef20b082519ae Mon Sep 17 00:00:00 2001
From: Mark Story <mark@mark-story.com>
Date: Sat, 11 Sep 2010 16:41:50 -0400
Subject: [PATCH] added the constant() test (closes #120)

---
 CHANGELOG                                   |    1 +
 doc/02-Twig-for-Template-Designers.markdown |   10 ++++++++++
 lib/Twig/Extension/Core.php                 |    6 ++++++
 test/Twig/Tests/Fixtures/tests/const.test   |   12 ++++++++++++
 test/Twig/Tests/integrationTest.php         |    2 ++
 5 files changed, 31 insertions(+), 0 deletions(-)
 create mode 100644 test/Twig/Tests/Fixtures/tests/const.test

diff --git a/CHANGELOG b/CHANGELOG
index ae1e046..5f57cd7 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,7 @@ Backward incompatibilities:
  * the odd and even filters are now tests:
      {{ foo|odd }} must now be written {{ foo is odd }}
 
+ * added a "constant" test
  * fixed objects with __toString() not being autoescaped
  * fixed subscript expressions when calling __call() (methods now keep the case)
  * added a "trans" filter
diff --git a/doc/02-Twig-for-Template-Designers.markdown b/doc/02-Twig-for-Template-Designers.markdown
index 1dd9d25..6f8c972 100644
--- a/doc/02-Twig-for-Template-Designers.markdown
+++ b/doc/02-Twig-for-Template-Designers.markdown
@@ -1239,6 +1239,16 @@ variable:
         the foo attribute really is the `false` PHP value
     {% endif %}
 
+### `constant`
+
+`constant` checks if a variable has the exact same value as a constant. You
+can use either global constants or class constants:
+
+    [twig]
+    {% if post.status is constant('Post::PUBLISHED') %}
+        the status attribute is exactly the same as Post::PUBLISHED
+    {% endif %}
+
 Extensions
 ----------
 
diff --git a/lib/Twig/Extension/Core.php b/lib/Twig/Extension/Core.php
index 6934fb3..725816f 100644
--- a/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@ -95,6 +95,7 @@ class Twig_Extension_Core extends Twig_Extension
             'sameas'      => new Twig_Test_Function('twig_test_sameas'),
             'none'        => new Twig_Test_Function('twig_test_none'),
             'divisibleby' => new Twig_Test_Function('twig_test_divisibleby'),
+            'constant'    => new Twig_Test_Function('twig_test_constant'),
         );
     }
 
@@ -332,3 +333,8 @@ function twig_test_odd($value)
 {
     return $value % 2 == 1;
 }
+
+function twig_test_constant($value, $constant)
+{
+    return constant($constant) === $value;
+}
diff --git a/test/Twig/Tests/Fixtures/tests/const.test b/test/Twig/Tests/Fixtures/tests/const.test
new file mode 100644
index 0000000..83d33f4
--- /dev/null
+++ b/test/Twig/Tests/Fixtures/tests/const.test
@@ -0,0 +1,12 @@
+--TEST--
+"const" test
+--TEMPLATE--
+{{ 30719 is constant('E_ALL') ? 'ok' : 'no' }}
+{{ 'bar' is constant('Foo::BAR_NAME') ? 'ok' : 'no' }}
+{{ value is constant('Foo::BAR_NAME') ? 'ok' : 'no' }}
+--DATA--
+return array('value' => 'bar');
+--EXPECT--
+ok
+ok
+ok
\ No newline at end of file
diff --git a/test/Twig/Tests/integrationTest.php b/test/Twig/Tests/integrationTest.php
index 9958d51..14ac53a 100644
--- a/test/Twig/Tests/integrationTest.php
+++ b/test/Twig/Tests/integrationTest.php
@@ -81,6 +81,8 @@ class Twig_Tests_IntegrationTest extends PHPUnit_Framework_TestCase
 
 class Foo
 {
+    const BAR_NAME = 'bar';
+
     public function bar($param1 = null, $param2 = null)
     {
         return 'bar'.($param1 ? '_'.$param1 : '').($param2 ? '-'.$param2 : '');
-- 
1.7.2.5