Merge pull request #42 from jrattue/master

Add support for distinct

Author: martin-helmich

src/MockCollection.php

@@ -385,7 +385,15 @@ public function deleteOne($filter, array $options = [])
 
     public function distinct($fieldName, $filter = [], array $options = [])
     {
-        // TODO: Implement this function
+        $values = [];
+
+        $matcher = $this->matcherFromQuery($filter);
+        foreach ($this->documents as $document){
+            if ($matcher($document) && isset($document[$fieldName])) {
+                $values[] = $document[$fieldName];
+            }
+        }
+        return array_unique($values);
     }
 
     public function dropIndex($indexName, array $options = [])

tests/MockCollectionTest.php

@@ -1162,4 +1162,22 @@ public function testFindScalarValueInArray()
         self::assertInstanceOf(BSONDocument::class, $document);
         self::assertArrayHasKey('foo', $document);
     }
+
+    /**
+     * @depends testInsertManyInsertsDocuments
+     */
+    public function testDistinct()
+    {
+        $this->col->insertMany([
+            ['foo' => 'foo', 'bar' => 1],
+            ['foo' => 'bar', 'bar' => 1],
+            ['foo' => 'baz', 'bar' => 2],
+        ]);
+
+        self::assertThat($this->col->distinct('foo'), self::equalTo(['foo', 'bar', 'baz']));
+        self::assertThat($this->col->distinct('missing'), self::equalTo([]));
+        self::assertThat($this->col->distinct('foo', ['bar' => 1]), self::equalTo(['foo', 'bar']));
+        self::assertThat($this->col->distinct('foo', ['bar' => 2]), self::equalTo(['baz']));
+    }
+
 }