Add ClassFinder::namespaceHasClasses instead of throwing on empty namespaces

README.md

@@ -97,7 +97,6 @@ Documentation
 * [Files could not locate PHP](docs/exceptions/filesCouldNotLocatePHP.md)
 * [Files exec not available](docs/exceptions/filesExecNotAvailable.md)
 * [Missing composer.json](docs/exceptions/missingComposerConfig.md)
-* [Unknown namespace](docs/exceptions/unknownNamespace.md)
 
 **Internals**
 

ci/php53.sh

@@ -1,3 +1,6 @@
+#!/usr/bin/env bash
+set -Eeuxo pipefail
+
 composer install --working-dir=$1/test/app1 --quiet || exit 1
 composer install --working-dir=$1/test/app2 --quiet || exit 1
 composer install --working-dir=$1 --quiet || exit 1

ci/php72.sh

@@ -1,3 +1,6 @@
+#!/usr/bin/env bash
+set -Eeuxo pipefail
+
 composer install --working-dir=$1/test/app1 --quiet || exit 1
 composer install --working-dir=$1/test/app2 --quiet || exit 1
 composer install --working-dir=$1 --quiet || exit 1

docs/changelog.md

@@ -1,3 +1,9 @@
+Unreleased
+----------
+
+* Don't throw if a namespace contains no classes
+* Add method `Classfinder::namespaceHasClasses` to detect if a namespace is empty
+
 Version 0.3.3
 -------------
 

docs/exceptions/unknownNamespace.md

@@ -1,6 +1,8 @@
 Unknown Namespace
 -----------------
 
+__This exception only occurs in versions 0.3.x and lower.__
+
 Example PHP:
 ```
 <?php

src/ClassFinder.php

@@ -58,25 +58,20 @@ class ClassFinder
     }
 
     /**
-     * @param $namespace
-     * @param $options
-     * @return array
+     * Identify classes in a given namespace.
+     *
+     * @param string $namespace
+     * @param int $options
+     *
+     * @return string[]
+     *
      * @throws \Exception
      */
     public static function getClassesInNamespace($namespace, $options = self::STANDARD_MODE)
     {
         self::initialize();
 
-        $findersWithNamespace = array_filter(self::getSupportedFinders(), function(FinderInterface $finder) use ($namespace){
-            return $finder->isNamespaceKnown($namespace);
-        });
-
-        if (count($findersWithNamespace) === 0) {
-            throw new ClassFinderException(sprintf("Unknown namespace '%s'. See '%s' for details.",
-                $namespace,
-                'https://gitlab.com/hpierce1102/ClassFinder/blob/master/docs/exceptions/unknownNamespace.md'
-            ));
-        }
+        $findersWithNamespace = self::findersWithNamespace($namespace);
 
         $classes = array_reduce($findersWithNamespace, function($carry, FinderInterface $finder) use ($namespace, $options){
             return array_merge($carry, $finder->findClasses($namespace, $options));
@@ -85,6 +80,20 @@ class ClassFinder
         return array_unique($classes);
     }
 
+    /**
+     * Check if a given namespace contains any classes.
+     *
+     * @param string $namespace
+     *
+     * @return bool
+     */
+    public static function namespaceHasClasses($namespace)
+    {
+        self::initialize();
+
+        return count(self::findersWithNamespace($namespace)) > 0;
+    }
+
     public static function setAppRoot($appRoot)
     {
         self::initialize();
@@ -160,4 +169,18 @@ class ClassFinder
 
         return $supportedFinders;
     }
+
+    /**
+     * @param string $namespace
+     *
+     * @return FinderInterface[]
+     */
+    private static function findersWithNamespace($namespace)
+    {
+        $findersWithNamespace = array_filter(self::getSupportedFinders(), function (FinderInterface $finder) use ($namespace) {
+            return $finder->isNamespaceKnown($namespace);
+        });
+
+        return $findersWithNamespace;
+    }
 }

src/FinderInterface.php

@@ -10,7 +10,7 @@ interface FinderInterface
      * For instance:
      * If given a classmap for "TestApp1\Foo\Bar\Baz", the namespace "TestApp1\Foo" is known, even if nothing loads
      * from that namespace directly. It is known because classes that include that namespace are known.
-     * @param $namespace
+     * @param string $namespace
      * @return bool
      */
     public function isNamespaceKnown($namespace);

test/app1/src/ClassFinderTest.php

@@ -15,13 +15,10 @@ class ClassFinderTest extends \PHPUnit_Framework_TestCase
         ClassFinder::setAppRoot(null);
     }
 
-    /**
-     * @expectedException HaydenPierce\ClassFinder\Exception\ClassFinderException
-     * @expectedExceptionMessageRegExp  /Unknown namespace 'DoesNotExist'\./
-     */
-    public function testThrowsOnUnknownNameSpace()
+    public function testNoClassesInNamespace()
     {
-        ClassFinder::getClassesInNamespace('DoesNotExist');
+        $this->assertCount(0, ClassFinder::getClassesInNamespace('DoesNotExist'));
+        $this->assertFalse(ClassFinder::namespaceHasClasses('DoesNotExist'));
     }
 
     /**

test/app1/src/FilesTest.php

@@ -67,14 +67,11 @@ class FilesTest extends \PHPUnit_Framework_TestCase
         );
     }
 
-    /**
-     * @expectedException HaydenPierce\ClassFinder\Exception\ClassFinderException
-     * @expectedExceptionMessageRegExp /Unknown namespace 'TestApp1\\FilesClasses'\./
-     */
     public function testFilesSupportRequiresEnabling()
     {
         ClassFinder::disableExperimentalFilesSupport(); // Disabling FilesSupport should cause no files to be found.
-        $classes = ClassFinder::getClassesInNamespace('TestApp1\FilesClasses');
+
+        $this->assertFalse(ClassFinder::namespaceHasClasses('TestApp1\FilesClasses'));
     }
 
 }

test/app1/src/PSR4Test.php

@@ -185,13 +185,10 @@ class PSR4Test extends \PHPUnit_Framework_TestCase
         );
     }
 
-    /**
-     * @expectedException HaydenPierce\ClassFinder\Exception\ClassFinderException
-     * @expectedExceptionMessageRegExp  /Unknown namespace 'TestApp1\\DoesNotExist'\./
-     */
-    public function testThrowsOnUnknownSubNameSpace()
+    public function testForClassesInNamespace()
     {
-        ClassFinder::getClassesInNamespace('TestApp1\DoesNotExist');
+        $this->assertFalse(ClassFinder::namespaceHasClasses('DoesNotExist'));
+        $this->assertTrue(ClassFinder::namespaceHasClasses('HaydenPierce\ClassFinder'));
     }
 
     public function testCanFindSelf()