[folks] For symmetry, nullify sets in tear_down() if created in set_up()

[Simon McVittie <smcv src gnome org>]

commit 452035512b3b7a78779a9e85ea9b215e7557930b
Author: Simon McVittie <simon mcvittie collabora co uk>
Date:   Mon Mar 18 12:36:18 2013 +0000

    For symmetry, nullify sets in tear_down() if created in set_up()
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=695381
    Signed-off-by: Simon McVittie <simon mcvittie collabora co uk>
    Reviewed-by: Philip Withnall <philip tecnocode co uk>

 tests/eds/persona-store-tests.vala              |    8 +++++++-
 tests/telepathy/individual-properties.vala      |    9 ++++++++-
 tests/telepathy/persona-store-capabilities.vala |    9 ++++++++-
 3 files changed, 23 insertions(+), 3 deletions(-)
---
diff --git a/tests/eds/persona-store-tests.vala b/tests/eds/persona-store-tests.vala
index b6a7a12..855f27b 100644
--- a/tests/eds/persona-store-tests.vala
+++ b/tests/eds/persona-store-tests.vala
@@ -24,7 +24,7 @@ using Gee;
 
 public class PersonaStoreTests : EdsTest.TestCase
 {
-  private HashSet<string> _capabilities_received;
+  private HashSet<string>? _capabilities_received = null;
 
   public PersonaStoreTests ()
     {
@@ -38,6 +38,12 @@ public class PersonaStoreTests : EdsTest.TestCase
       this._capabilities_received = new HashSet<string> ();
     }
 
+  public override void tear_down ()
+    {
+      this._capabilities_received = null;
+      base.tear_down ();
+    }
+
   public void test_persona_store ()
     {
       Gee.HashMap<string, Value?> c1 = new Gee.HashMap<string, Value?> ();
diff --git a/tests/telepathy/individual-properties.vala b/tests/telepathy/individual-properties.vala
index b8fb345..c0347bb 100644
--- a/tests/telepathy/individual-properties.vala
+++ b/tests/telepathy/individual-properties.vala
@@ -27,7 +27,7 @@ using Gee;
 public class IndividualPropertiesTests : TpfTest.TestCase
 {
   private int _test_timeout = 3;
-  private HashSet<string> _changes_pending;
+  private HashSet<string>? _changes_pending = null;
 
   public IndividualPropertiesTests ()
     {
@@ -53,6 +53,13 @@ public class IndividualPropertiesTests : TpfTest.TestCase
       this._changes_pending = new HashSet<string> ();
     }
 
+  public override void tear_down ()
+    {
+      this._changes_pending = null;
+
+      base.tear_down ();
+    }
+
   public void test_individual_properties ()
     {
       var main_loop = new GLib.MainLoop (null, false);
diff --git a/tests/telepathy/persona-store-capabilities.vala b/tests/telepathy/persona-store-capabilities.vala
index 31423da..bb3974d 100644
--- a/tests/telepathy/persona-store-capabilities.vala
+++ b/tests/telepathy/persona-store-capabilities.vala
@@ -26,7 +26,7 @@ using Gee;
 
 public class PersonaStoreCapabilitiesTests : TpfTest.TestCase
 {
-  private HashSet<string> _capabilities_received;
+  private HashSet<string>? _capabilities_received = null;
   private int _test_timeout = 3;
 
   public PersonaStoreCapabilitiesTests ()
@@ -47,6 +47,13 @@ public class PersonaStoreCapabilitiesTests : TpfTest.TestCase
       this._capabilities_received = new HashSet<string> ();
     }
 
+  public override void tear_down ()
+    {
+      this._capabilities_received = null;
+
+      base.tear_down ();
+    }
+
   public void test_persona_store_capabilities ()
     {
       var main_loop = new GLib.MainLoop (null, false);