Change to GenericTypeCollection equality to not consider generic type…

… name as it was causing a bug when overriding generic types. Fixes #33

jfixture/src/main/java/com/flextrade/jfixture/utility/GenericTypeCollection.java

@@ -49,8 +49,13 @@ public boolean equals(Object o) {
         if (o == null || getClass() != o.getClass()) return false;
 
         GenericTypeCollection that = (GenericTypeCollection) o;
+        if (underlying.length != that.underlying.length) return false;
 
-        return length == that.length && nameTypeMap.equals(that.nameTypeMap) && Arrays.equals(underlying, that.underlying);
+        for (int i = 0; i < underlying.length; i++) {
+            if (!underlying[i].getType().equals(that.underlying[i].getType())) return false;
+        }
+
+        return true;
     }
 
     @Override

jfixture/src/test/java/component/customisation/TestInstanceCustomisation.java

@@ -7,6 +7,8 @@
 import testtypes.TypeWithProperties;
 import testtypes.generic.TypeWithGenericField;
 
+import java.util.List;
+
 import static junit.framework.Assert.assertEquals;
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.assertSame;
@@ -44,4 +46,30 @@ public void does_not_auto_populate_properties_of_instance() {
         assertNull(specimen.getSymbol());
         assertEquals(0, specimen.getSize());
     }
+
+    @Test
+    public void instance_customisation_works_will_null_instances_for_generic_types() {
+        JFixture fixture = new JFixture();
+        fixture.customise(new InstanceCustomisation<List<Contained>>(new SpecimenType<List<Contained>>(){}, null));
+
+        Container container = fixture.create(Container.class);
+
+        assertNull(container.list);
+    }
+
+    static class Container {
+        final List<Contained> list;
+
+        Container(List<Contained> list) {
+            this.list = list;
+        }
+    }
+
+    static class Contained {
+        final String name;
+
+        Contained(String name) {
+            this.name = name;
+        }
+    }
 }