minor symfony#10223 [ExpressionLanguage] added some tests for the built-in constant() function (fabpot)

This PR was merged into the 2.4 branch.

Discussion
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[ExpressionLanguage] added some tests for the built-in constant() function

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#10216
| License       | MIT
| Doc PR        | n/a

Commits
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d8f55f5 [ExpressionLanguage] added some tests for the built-in constant() function

Author: fabpot

src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php

@@ -45,4 +45,13 @@ public function testCachedParse()
         $parsedExpression = $expressionLanguage->parse('1 + 1', array());
         $this->assertSame($savedParsedExpression, $parsedExpression);
     }
+
+    public function testConstantFunction()
+    {
+        $expressionLanguage = new ExpressionLanguage();
+        $this->assertEquals(PHP_VERSION, $expressionLanguage->evaluate('constant("PHP_VERSION")'));
+
+        $expressionLanguage = new ExpressionLanguage();
+        $this->assertEquals('constant("PHP_VERSION")', $expressionLanguage->compile('constant("PHP_VERSION")'));
+    }
 }