diff --git a/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang b/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang
new file mode 100644
index 0000000..cd71621
--- /dev/null
+++ b/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang
@@ -0,0 +1,14 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    import ietf-yang-types {
+        prefix "P";
+    }
+    grouping create {
+        uses P:valid;
+    }
+    container test{
+        uses create;
+    }
+}
diff --git a/src/test/resources/SelfFileLinkingWithGroupingWithSelfAndExternalPrefixMix.yang b/src/test/resources/SelfFileLinkingWithGroupingWithSelfAndExternalPrefixMix.yang
new file mode 100644
index 0000000..84236a2
--- /dev/null
+++ b/src/test/resources/SelfFileLinkingWithGroupingWithSelfAndExternalPrefixMix.yang
@@ -0,0 +1,28 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    import ietf-yang-types {
+        prefix "P";
+    }
+    grouping Percentage {
+        leaf hello{
+            type String;
+        }
+    }
+    container ospf {
+        list valid {
+            key "invalid";
+	    leaf invalid{
+                type String;
+            }
+            uses Ant:FirstClass;
+            grouping FirstClass {
+                uses P:PassingClass;
+            }
+        }
+        grouping PassingClass {
+            uses Ant:Percentage;
+        }
+    }
+}
diff --git a/src/test/resources/SelfFileLinkingWithGroupingWithSelfModulePrefix.yang b/src/test/resources/SelfFileLinkingWithGroupingWithSelfModulePrefix.yang
new file mode 100644
index 0000000..23f197b
--- /dev/null
+++ b/src/test/resources/SelfFileLinkingWithGroupingWithSelfModulePrefix.yang
@@ -0,0 +1,25 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    grouping Percentage {
+	leaf hello{
+            type String;
+        }
+    }
+    container ospf {
+        list valid {
+            key "invalid";
+	    leaf invalid{
+                type String;
+            }
+            uses Ant:FirstClass;
+            grouping FirstClass {
+                uses PassingClass;
+            }
+        }
+        grouping PassingClass {
+            uses Ant:Percentage;
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang b/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang
new file mode 100644
index 0000000..d449adf
--- /dev/null
+++ b/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang
@@ -0,0 +1,25 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container valid {
+    	grouping endpoint {
+             leaf zip-code {
+                 type string;
+             }
+             uses failure;
+	     container hold {
+                 leaf newone {
+                     type string;
+                 }
+                 
+             }
+             uses failure;              
+    	}
+        grouping failure {
+            leaf test {
+                type string;
+            }
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionGroupingInRpcAndUsesInOutput.yang b/src/test/resources/SelfResolutionGroupingInRpcAndUsesInOutput.yang
new file mode 100644
index 0000000..3589a9f
--- /dev/null
+++ b/src/test/resources/SelfResolutionGroupingInRpcAndUsesInOutput.yang
@@ -0,0 +1,34 @@
+module rock {
+    namespace "http://example.net/rock";
+    prefix "rock";
+
+    rpc rock-the-house {
+        description "description";
+        status current;
+        reference "reference";
+	grouping hello {
+	    list valid {
+        	    key invalid-interval;
+    	            reference "RFC 6020";
+    		    leaf invalid-interval {
+        	    type "uint16";
+        	    units "seconds";
+        	    status current;
+        	    reference "RFC 6020";
+    		    }
+	     }
+         }
+        input {
+             leaf zip-code {
+                 type string;
+             }
+             uses hello;
+        }
+        output {
+             leaf status {
+                 type string;
+             }
+    	     uses hello;
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionGroupingReferencingItselfFailureScenerio.yang b/src/test/resources/SelfResolutionGroupingReferencingItselfFailureScenerio.yang
new file mode 100644
index 0000000..3e0ba3d
--- /dev/null
+++ b/src/test/resources/SelfResolutionGroupingReferencingItselfFailureScenerio.yang
@@ -0,0 +1,13 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container valid {
+    	grouping endpoint {
+             leaf zip-code {
+                 type string;
+             }
+             uses endpoint;
+    	}
+    }
+}
diff --git a/src/test/resources/SelfResolutionGroupingWithMultipleUses.yang b/src/test/resources/SelfResolutionGroupingWithMultipleUses.yang
new file mode 100644
index 0000000..906890f
--- /dev/null
+++ b/src/test/resources/SelfResolutionGroupingWithMultipleUses.yang
@@ -0,0 +1,63 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container valid {
+    	grouping endpoint {
+             leaf zip-code {
+                 type string;
+             }
+             uses first;
+             container design {
+	         uses second;
+	         container correct {
+                     leaf newone {
+                         type string;
+                     }
+                     uses third;
+                 }
+	     }
+             uses fourth;
+             uses fifth;
+    	}
+        uses endpoint;
+        grouping first {
+	    list valid {
+        	    key invalid-interval;
+    	            reference "RFC 6020";
+    		    leaf invalid-interval {
+        	    type "uint16";
+        	    units "seconds";
+        	    status current;
+        	    reference "RFC 6020";
+    		    }
+	     }
+        }
+        grouping second {
+            leaf ink {
+                type int32;
+            }
+        }
+        grouping third {
+            container value {
+                leaf zip-code {
+                    type string;
+                }
+            }
+        }
+        grouping fourth {
+            typedef my-type {
+                status deprecated;
+                type int32;
+            }
+            leaf correct {
+                type my-type;
+            }
+        }
+        grouping fifth {
+            leaf abc {
+                type string;
+            }
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionNestedGroupingWithUnresolvedUses.yang b/src/test/resources/SelfResolutionNestedGroupingWithUnresolvedUses.yang
new file mode 100644
index 0000000..4dbc1a2
--- /dev/null
+++ b/src/test/resources/SelfResolutionNestedGroupingWithUnresolvedUses.yang
@@ -0,0 +1,17 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container test{
+        leaf leaf2{
+            type String;
+        }
+    	grouping treat {
+            grouping create {
+                grouping mass {
+                }
+            }
+        }
+    }
+    uses treat;
+}
diff --git a/src/test/resources/SelfResolutionRpcWithOneTypedefAndTwoGroupingUnderDifferentNode.yang b/src/test/resources/SelfResolutionRpcWithOneTypedefAndTwoGroupingUnderDifferentNode.yang
new file mode 100644
index 0000000..91dc763
--- /dev/null
+++ b/src/test/resources/SelfResolutionRpcWithOneTypedefAndTwoGroupingUnderDifferentNode.yang
@@ -0,0 +1,38 @@
+module rock {
+    namespace "http://example.net/rock";
+    prefix "rock";
+
+    rpc rock-the-house {
+        description "description";
+        status current;
+        reference "reference";
+        input {
+            leaf zip-code {
+                type string;
+            }
+             grouping creative {
+                leaf carry {
+                    type string;
+                }
+             }
+        }
+        output {
+             leaf status {
+                 type string;
+             }
+	     grouping creative {
+	        list valid {
+        	    key invalid-interval;
+    		    leaf invalid-interval {
+        	        type "uint16";
+    		    }
+	        }
+             }
+             typedef my-type {
+                 status deprecated;
+                 type int32;
+             }
+             uses creative;
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevel.yang b/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevel.yang
new file mode 100644
index 0000000..52641d8
--- /dev/null
+++ b/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevel.yang
@@ -0,0 +1,11 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    uses hello;
+    grouping hello {
+	leaf hello{
+            type String;
+        }
+    }
+}
diff --git a/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevelGroupingWithChild.yang b/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevelGroupingWithChild.yang
new file mode 100644
index 0000000..f4f12b0
--- /dev/null
+++ b/src/test/resources/SelfResolutionWhenUsesAndGroupingAtRootLevelGroupingWithChild.yang
@@ -0,0 +1,16 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    uses treat;
+    grouping treat {
+	leaf treat{
+            type String;
+        }
+        container test{
+            leaf leaf2{
+                type String;
+            }
+        }
+    }
+}
diff --git a/src/test/resources/UsesInContainer.yang b/src/test/resources/UsesInContainer.yang
index 9fb5fbf..df52fd6 100644
--- a/src/test/resources/UsesInContainer.yang
+++ b/src/test/resources/UsesInContainer.yang
@@ -2,6 +2,8 @@
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
+    grouping endpoint {
+    }
     container valid {
         uses endpoint {
             description "grouping under test";
diff --git a/src/test/resources/UsesInList.yang b/src/test/resources/UsesInList.yang
index b79e7b1..6ac7795 100644
--- a/src/test/resources/UsesInList.yang
+++ b/src/test/resources/UsesInList.yang
@@ -4,7 +4,9 @@
     prefix Ant;
     import ietf-yang-types {
              prefix "P";
-         }
+         }    
+    grouping endpoint {
+    }
     list valid {
         key address;
         leaf address {
diff --git a/src/test/resources/UsesInModule.yang b/src/test/resources/UsesInModule.yang
index a0a05f4..02b9f09 100644
--- a/src/test/resources/UsesInModule.yang
+++ b/src/test/resources/UsesInModule.yang
@@ -2,5 +2,7 @@
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
+    grouping endpoint {
+    }
     uses endpoint;
 }