allow IdentificationTests to override the strategy used for resolving…

… the expected form (#555)

src/test/java/emissary/test/core/junit5/IdentificationTest.java

@@ -57,7 +57,7 @@ public void testIdentificationPlace(String resource) {
 
         try (InputStream doc = new ResourceReader().getResourceAsStream(resource)) {
             byte[] data = IOUtils.toByteArray(doc);
-            String expectedAnswer = resource.replaceAll("^.*/([^/@]+)(@\\d+)?\\.dat$", "$1");
+            String expectedAnswer = resolveFormForResource(resource);
             IBaseDataObject payload = DataObjectFactory.getInstance(data, resource, Form.UNKNOWN);
             processPreHook(payload, resource);
             place.agentProcessHeavyDuty(payload);
@@ -71,6 +71,16 @@ public void testIdentificationPlace(String resource) {
         }
     }
 
+    /**
+     * Resolves the expected form for the test resource.
+     *
+     * @param resource complete file path of the test resource
+     * @return form expected for the resource
+     */
+    protected String resolveFormForResource(String resource) {
+        return resource.replaceAll("^.*/([^/@]+)(@\\d+)?\\.dat$", "$1");
+    }
+
     protected void processPreHook(IBaseDataObject payload, String resource) {
         // Nothing to do here
     }