[ONOS-6941] addition of derived identities search

Change-Id: Ibefb62de9c00fdc57cf67d6433b850ddecccfb7a
diff --git a/compiler/plugin/maven/src/test/java/org/onosproject/yang/compiler/plugin/maven/AugmentTranslatorTest.java b/compiler/plugin/maven/src/test/java/org/onosproject/yang/compiler/plugin/maven/AugmentTranslatorTest.java
index 97e2a86..01a47f9 100644
--- a/compiler/plugin/maven/src/test/java/org/onosproject/yang/compiler/plugin/maven/AugmentTranslatorTest.java
+++ b/compiler/plugin/maven/src/test/java/org/onosproject/yang/compiler/plugin/maven/AugmentTranslatorTest.java
@@ -193,6 +193,38 @@
     }
 
     /**
+     * Checks the derived identities with referred base types in inter modules.
+     *
+     * @throws IOException            if any error occurs during IO on files
+     * @throws ParserException        if any error occurs during parsing
+     * @throws MojoExecutionException if any mojo operation fails
+     */
+    @Test
+    public void processIdentityRefTranslator() throws IOException,
+            ParserException,
+            MojoExecutionException {
+
+        deleteDirectory(DIR);
+        String searchDir = "src/test/resources/DerivedIdentity";
+
+        Set<Path> paths = new HashSet<>();
+        for (String file : getYangFiles(searchDir)) {
+            paths.add(Paths.get(file));
+        }
+
+        utilManager.createYangFileInfoSet(paths);
+        utilManager.parseYangFileInfoSet();
+        utilManager.createYangNodeSet();
+        utilManager.resolveDependenciesUsingLinker();
+
+        YangPluginConfig yangPluginConfig = new YangPluginConfig();
+        yangPluginConfig.setCodeGenDir(DIR);
+        utilManager.translateToJava(yangPluginConfig);
+        YangPluginConfig.compileCode(COMP);
+        deleteDirectory(DIR);
+    }
+
+    /**
      * Checks collision detection of an augment linked to a target having
      * same node in the same level.
      *
diff --git a/compiler/plugin/maven/src/test/resources/DerivedIdentity/DerivedIdentities.yang b/compiler/plugin/maven/src/test/resources/DerivedIdentity/DerivedIdentities.yang
new file mode 100644
index 0000000..379f832
--- /dev/null
+++ b/compiler/plugin/maven/src/test/resources/DerivedIdentity/DerivedIdentities.yang
@@ -0,0 +1,31 @@
+module IdentityTypedef {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix IdentityTypedef;
+
+    identity ref-address-family {
+
+    }
+
+    identity ipv4-address-family {
+        base ref-address-family;
+    }
+
+    identity ipv6-address-family {
+        base ref-address-family;
+    }
+
+    leaf tunnel {
+        type type15;
+    }
+
+    leaf-list network-ref {
+        type type15;
+    }
+
+    typedef type15 {
+        type identityref {
+            base ref-address-family;
+        }
+    }
+}
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