From d916b8e16501faaea8f70674e1b502702ea90617 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.uk>
Date: Fri, 1 Jun 2018 20:26:06 +0100
Subject: [PATCH] Allow for setting multiple subject conditions

---
 src/Model/Filter.php      |  8 +++++---
 tests/Unit/FilterTest.php | 13 ++++++++++++-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/Model/Filter.php b/src/Model/Filter.php
index 4d71ff3..c7e4d03 100644
--- a/src/Model/Filter.php
+++ b/src/Model/Filter.php
@@ -74,13 +74,15 @@ class Filter
     }
 
     /**
-     * @param string $subject
+     * @param string|array $values
      *
      * @return $this
      */
-    public function subject($subject)
+    public function subject($values)
     {
-        $this->properties['subject'] = $subject;
+        $this->properties['subject'] = collect($values)->map(function ($value) {
+            return json_encode($value);
+        })->implode('|');
 
         return $this;
     }
diff --git a/tests/Unit/FilterTest.php b/tests/Unit/FilterTest.php
index f3cc066..c95c5fb 100644
--- a/tests/Unit/FilterTest.php
+++ b/tests/Unit/FilterTest.php
@@ -102,11 +102,22 @@ class FilterTest extends TestCase
     public function testSubject()
     {
         $this->assertEquals(
-            ['subject' => 'Something'],
+            ['subject' => '"Something"'],
             $this->filter->subject('Something')->toArray()
         );
     }
 
+    /**
+     * Test that multiple subject conditions can be added.
+     */
+    public function testMultipleSubjectsCanBeAdded()
+    {
+        $this->assertEquals(
+          ['subject' => '"Test"|"Foo bar"'],
+          $this->filter->subject(['Test', 'Foo bar'])->toArray()
+        );
+    }
+
     /**
      * @covers Filter::hasAttachment()
      */