Support disallow_silence (#21)

* Make fbexpect meet `disallow_silence`

* Enable strict options that introduce test failures

* Require HHVM 4.25 for HHI support of array_literal

.hhconfig

@@ -6,6 +6,5 @@ disallow_unsafe_comparisons=true
 decl_override_require_hint=true
 enable_experimental_tc_features=shape_field_check,sealed_classes
 user_attributes=
-
-; Once the minimum hhvm version hits 4.25 this setting can be safely enabled
-disallow_array_literal = false
+disallow_array_literal = true
+disallow_silence = true

src/Constraint/IsType.hack

@@ -30,12 +30,17 @@ class IsType {
       'array' => ($x ==> \is_array($x)),
       'object' => ($x ==> \is_object($x)),
       'resource' => (
-        $x ==> ($x is resource) ||
-          (
-            @\get_resource_type(
-              /* HH_FIXME[4110] closed resources fail is resource */ $x,
-            ) is string
-          )
+        $x ==> {
+          if ($x is resource) {
+            return true;
+          }
+          $error_level = \error_reporting(0);
+          $is_resource = \get_resource_type(
+            /* HH_FIXME[4110] closed resources fail is resource */ $x,
+          ) is string;
+          \error_reporting($error_level);
+          return $is_resource;
+        }
       ),
       'scalar' => ($x ==> \is_scalar($x)),
       'callable' => ($x ==> \is_callable($x)),