Default ContextActivities properties to arrays

* The check to make sure the properties were set was not happening soon
  enough so that the set methods through the _listSetter were trying to
  push to arrays that were not defined yet
* Improve tests for fromJSON instantiation in ContextActivities

Author: brianjmiller

src/ContextActivities.php

@@ -21,10 +21,10 @@ class ContextActivities implements VersionableInterface
 {
     use ArraySetterTrait, FromJSONTrait;
 
-    protected $category;
-    protected $parent;
-    protected $grouping;
-    protected $other;
+    protected $category = array();
+    protected $parent = array();
+    protected $grouping = array();
+    protected $other = array();
 
     private static $directProps = array(
         'category',
@@ -39,21 +39,6 @@ public function __construct() {
 
             $this->_fromArray($arg);
         }
-
-        foreach (
-            [
-                'category',
-                'parent',
-                'grouping',
-                'other',
-            ] as $k
-        ) {
-            $method = 'set' . ucfirst($k);
-
-            if (! isset($this->$k)) {
-                $this->$method(array());
-            }
-        }
     }
 
     public function asVersion($version) {

tests/ContextActivitiesTest.php

@@ -31,15 +31,31 @@ public function testInstantiation() {
         }
     }
 
-    /*
-    // TODO: need to loop possible configs
     public function testFromJSONInstantiations() {
-        $obj = ContextActivities::fromJSON('{"mbox":"' . COMMON_GROUP_MBOX . '", "member":[{"mbox":"' . COMMON_MBOX . '"}]}');
+        $common_activity = new TinCan\Activity(self::$common_activity_cfg);
+
+        $all_json = array();
+        foreach (self::$listProps as $k) {
+            $getMethod = 'get' . ucfirst($k);
+
+            $prop_json = '"' . $k . '":[' . json_encode($common_activity->asVersion('1.0.0')) . ']';
+
+            array_push($all_json, $prop_json);
+
+            $obj = ContextActivities::fromJSON('{' . $prop_json . '}');
+
+            $this->assertInstanceOf('TinCan\ContextActivities', $obj);
+            $this->assertEquals([$common_activity], $obj->$getMethod(), "$k list");
+        }
+
+        $obj = ContextActivities::fromJSON('{' . join(",", $all_json) . "}");
+
         $this->assertInstanceOf('TinCan\ContextActivities', $obj);
-        $this->assertSame(COMMON_GROUP_MBOX, $obj->getMbox(), 'mbox value');
-        $this->assertEquals([['mbox' => COMMON_MBOX]], $obj->getMember(), 'member list');
+        $this->assertEquals([$common_activity], $obj->getCategory(), "all props: category list");
+        $this->assertEquals([$common_activity], $obj->getParent(), "all props: parent list");
+        $this->assertEquals([$common_activity], $obj->getGrouping(), "all props: grouping list");
+        $this->assertEquals([$common_activity], $obj->getOther(), "all props: other list");
     }
-    */
 
     // TODO: need to loop versions
     public function testAsVersion() {