[ONOS-4838] Decimal64 Range Restrictions Modification

Change-Id: I4d79c0da5ef400a188bfc5a85830e1187602e698
diff --git a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/BitListenerTest.java b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/BitListenerTest.java
index ef25c97..a4410a7 100644
--- a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/BitListenerTest.java
+++ b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/BitListenerTest.java
@@ -21,6 +21,7 @@
 import org.junit.Test;
 import org.onosproject.yangutils.datamodel.YangBit;
 import org.onosproject.yangutils.datamodel.YangBits;
+import org.onosproject.yangutils.datamodel.YangDerivedInfo;
 import org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes;
 import org.onosproject.yangutils.datamodel.YangLeaf;
 import org.onosproject.yangutils.datamodel.YangModule;
@@ -168,6 +169,117 @@
     }
 
     /**
+     * Checks bit statement with typedef with referred leaf.
+     */
+    @Test
+    public void processBitTypedefReferredLeafStatement() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/BitTypedefReferredLeafStatement.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangTypeDef typedef = (YangTypeDef) yangNode.getChild();
+        assertThat(typedef.getName(), is("topBits"));
+
+        YangType type = typedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.BITS));
+        assertThat(type.getDataTypeName(), is("bits"));
+
+        // Check bit name map
+        Map<String, YangBit> bitNameMap = ((YangBits) type.getDataTypeExtendedInfo()).getBitNameMap();
+        assertThat(bitNameMap.size(), is(3));
+        for (Map.Entry<String, YangBit> element : bitNameMap.entrySet()) {
+            String bitName = element.getKey();
+            YangBit yangBit = element.getValue();
+            if (bitName.equals("disable-nagle")) {
+                assertThat(yangBit.getPosition(), is(0));
+            } else if (bitName.equals("auto-sense-speed")) {
+                assertThat(yangBit.getPosition(), is(1));
+            } else if (bitName.equals("Mb-only")) {
+                assertThat(yangBit.getPosition(), is(2));
+            } else {
+                throw new IOException("Invalid bit name: " + bitName);
+            }
+        }
+
+        // Check bit position map
+        Map<Integer, YangBit> bitPositionMap = ((YangBits) type.getDataTypeExtendedInfo()).getBitPositionMap();
+        assertThat(bitPositionMap.size(), is(3));
+        for (Map.Entry<Integer, YangBit> element : bitPositionMap.entrySet()) {
+            int position = element.getKey();
+            YangBit yangBit = element.getValue();
+            if (position == 0) {
+                assertThat(yangBit.getBitName(), is("disable-nagle"));
+            } else if (position == 1) {
+                assertThat(yangBit.getBitName(), is("auto-sense-speed"));
+            } else if (position == 2) {
+                assertThat(yangBit.getBitName(), is("Mb-only"));
+            } else {
+                throw new IOException("Invalid bit position: " + position);
+            }
+        }
+
+        // Check leaf reffered typedef
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getName(), is("myBits"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("topBits"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+        YangType<YangDerivedInfo> typeDerived = (YangType<YangDerivedInfo>) leafInfo.getDataType();
+        YangDerivedInfo derivedInfo = (YangDerivedInfo) typeDerived.getDataTypeExtendedInfo();
+        YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(prevTypedef.getName(), is("topBits"));
+        YangType topType = prevTypedef.getTypeList().iterator().next();
+        assertThat(topType.getDataType(), is(YangDataTypes.BITS));
+        assertThat(topType.getDataTypeName(), is("bits"));
+        YangType<YangBits> typeBits = (YangType<YangBits>) topType;
+        YangBits bits = typeBits.getDataTypeExtendedInfo();
+
+        // Check bit name map
+        bitNameMap = bits.getBitNameMap();
+        assertThat(bitNameMap.size(), is(3));
+        for (Map.Entry<String, YangBit> element : bitNameMap.entrySet()) {
+            String bitName = element.getKey();
+            YangBit yangBit = element.getValue();
+            if (bitName.equals("disable-nagle")) {
+                assertThat(yangBit.getPosition(), is(0));
+            } else if (bitName.equals("auto-sense-speed")) {
+                assertThat(yangBit.getPosition(), is(1));
+            } else if (bitName.equals("Mb-only")) {
+                assertThat(yangBit.getPosition(), is(2));
+            } else {
+                throw new IOException("Invalid bit name: " + bitName);
+            }
+        }
+
+        // Check bit position map
+        bitPositionMap = bits.getBitPositionMap();
+        assertThat(bitPositionMap.size(), is(3));
+        for (Map.Entry<Integer, YangBit> element : bitPositionMap.entrySet()) {
+            int position = element.getKey();
+            YangBit yangBit = element.getValue();
+            if (position == 0) {
+                assertThat(yangBit.getBitName(), is("disable-nagle"));
+            } else if (position == 1) {
+                assertThat(yangBit.getBitName(), is("auto-sense-speed"));
+            } else if (position == 2) {
+                assertThat(yangBit.getBitName(), is("Mb-only"));
+            } else {
+                throw new IOException("Invalid bit position: " + position);
+            }
+        }
+    }
+
+    /**
      * Checks bit statement with union.
      */
     @Test
diff --git a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64ListenerTest.java b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64ListenerTest.java
index ec5b3fc..303a3e6 100644
--- a/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64ListenerTest.java
+++ b/utils/yangutils/plugin/src/test/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64ListenerTest.java
@@ -33,6 +33,7 @@
 import org.onosproject.yangutils.datamodel.YangType;
 import org.onosproject.yangutils.datamodel.YangTypeDef;
 import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.linker.exceptions.LinkerException;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
 import org.onosproject.yangutils.datamodel.utils.builtindatatype.YangDataTypes;
@@ -56,7 +57,7 @@
     @Test
     public void processDecimal64TypeStatement() throws IOException, ParserException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypeStatement.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypeStatement.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -84,7 +85,7 @@
     @Test
     public void processDecimal64TypeWithRangeStatement() throws IOException, ParserException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypeWithRangeStatement.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypeWithRangeStatement.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -122,7 +123,7 @@
     @Test
     public void processDecimal64ValueSuccessfulValidation() throws IOException, ParserException, DataModelException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypeValidation.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypeValidation.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -157,7 +158,7 @@
         thrown.expect(DataModelException.class);
         thrown.expectMessage("YANG file error : decimal64 validation failed.");
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypeValidation.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypeValidation.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -191,7 +192,7 @@
         thrown.expect(ParserException.class);
         thrown.expectMessage("YANG file error : fraction-digits value should be between 1 and 18.");
 
-        manager.getDataModel("src/test/resources/Decimal64TypeInvalidMaxValueFraction.yang");
+        manager.getDataModel("src/test/resources/decimal64/Decimal64TypeInvalidMaxValueFraction.yang");
     }
 
     /**
@@ -202,7 +203,7 @@
         thrown.expect(ParserException.class);
         thrown.expectMessage("YANG file error : fraction-digits value should be between 1 and 18.");
 
-        manager.getDataModel("src/test/resources/Decimal64TypeInvalidMinValueFraction1.yang");
+        manager.getDataModel("src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction1.yang");
     }
 
     /**
@@ -213,7 +214,7 @@
         thrown.expect(ParserException.class);
         thrown.expectMessage("YANG file error : fraction-digits value should be between 1 and 18.");
 
-        manager.getDataModel("src/test/resources/Decimal64TypeInvalidMinValueFraction2.yang");
+        manager.getDataModel("src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction2.yang");
     }
 
     /**
@@ -222,7 +223,7 @@
     @Test
     public void processDecimal64TypeWithMultiValueRangeStatement() throws IOException, ParserException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypeWithMultiValueRangeStmnt.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypeWithMultiValueRangeStmnt.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -272,7 +273,7 @@
         thrown.expect(ParserException.class);
         thrown.expectMessage("YANG file error : decimal64 validation failed.");
 
-        manager.getDataModel("src/test/resources/Decimal64TypeInvalidRangeStmnt.yang");
+        manager.getDataModel("src/test/resources/decimal64/Decimal64TypeInvalidRangeStmnt.yang");
     }
 
     /**
@@ -283,7 +284,7 @@
         thrown.expect(ParserException.class);
         thrown.expectMessage("YANG file error : a type decimal64 must have fraction-digits statement.");
 
-        manager.getDataModel("src/test/resources/Decimal64TypeWithoutFraction.yang");
+        manager.getDataModel("src/test/resources/decimal64/Decimal64TypeWithoutFraction.yang");
     }
 
     /**
@@ -292,7 +293,7 @@
     @Test
     public void processDecimal64TypedefStatement() throws IOException, ParserException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64TypedefStatement.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64TypedefStatement.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -329,7 +330,7 @@
     @Test
     public void processDecimal64MultiTypedefStatement() throws IOException, ParserException {
 
-        YangNode node = manager.getDataModel("src/test/resources/Decimal64MultiTypedefStatement.yang");
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefStatement.yang");
 
         // Check whether the data model tree returned is of type module.
         assertThat((node instanceof YangModule), is(true));
@@ -345,15 +346,15 @@
         YangLeaf leafInfo = leafIterator.next();
 
         // check leaf type
-        assertThat(leafInfo.getName(), is("setFourDecimal"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("validDecimal"));
+        assertThat(leafInfo.getName(), is("lowerDecimal"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("midDecimal"));
         YangType<YangDerivedInfo> derivedInfoType = (YangType<YangDerivedInfo>) leafInfo.getDataType();
         assertThat(derivedInfoType.getDataType(), is(YangDataTypes.DERIVED));
         YangDerivedInfo derivedInfo = (YangDerivedInfo) derivedInfoType.getDataTypeExtendedInfo();
 
         // check previous typedef
         YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
-        assertThat(prevTypedef.getName(), is("validDecimal"));
+        assertThat(prevTypedef.getName(), is("midDecimal"));
         YangType type = prevTypedef.getTypeList().iterator().next();
         assertThat(type.getDataType(), is(YangDataTypes.DERIVED));
         derivedInfo = (YangDerivedInfo) type.getDataTypeExtendedInfo();
@@ -368,4 +369,260 @@
         YangDecimal64 decimal64 = decimal64Type.getDataTypeExtendedInfo();
         assertThat(decimal64.getFractionDigit(), is(4));
     }
+
+    /**
+     * Checks decimal64 with multiple typedef with single range statement.
+     * Range value in typedef statement.
+     */
+    @Test
+    public void processDecimal64MultiTypedefRangeStatement() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefRangeStatement.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // check leaf type
+        assertThat(leafInfo.getName(), is("lowerDecimal"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("midDecimal"));
+        YangType<YangDerivedInfo> derivedInfoType = (YangType<YangDerivedInfo>) leafInfo.getDataType();
+        assertThat(derivedInfoType.getDataType(), is(YangDataTypes.DERIVED));
+        YangDerivedInfo derivedInfo = (YangDerivedInfo) derivedInfoType.getDataTypeExtendedInfo();
+
+        // Check range restriction
+        YangRangeRestriction rangeRestriction = (YangRangeRestriction) derivedInfo.getResolvedExtendedInfo();
+        ListIterator<YangRangeInterval> rangeListIterator = rangeRestriction.getAscendingRangeIntervals()
+                .listIterator();
+        YangRangeInterval rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(1.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+
+        // check previous typedef
+        YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(prevTypedef.getName(), is("midDecimal"));
+        YangType type = prevTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DERIVED));
+        derivedInfo = (YangDerivedInfo) type.getDataTypeExtendedInfo();
+
+        // check top typedef
+        YangTypeDef topTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(topTypedef.getName(), is("topDecimal"));
+        type = topTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DECIMAL64));
+        assertThat(type.getDataTypeName(), is("decimal64"));
+        YangType<YangDecimal64> decimal64Type = (YangType<YangDecimal64>) type;
+        YangDecimal64 decimal64 = decimal64Type.getDataTypeExtendedInfo();
+        assertThat(decimal64.getFractionDigit(), is(4));
+
+        // Check range restriction
+        rangeRestriction = (YangRangeRestriction) decimal64.getRangeRestrictedExtendedInfo();
+        rangeListIterator = rangeRestriction.getAscendingRangeIntervals().listIterator();
+        rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(1.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+    }
+
+    /**
+     * Checks decimal64 with multiple typedef with single range statement.
+     * Range value in leaf statement.
+     */
+    @Test
+    public void processDecimal64MultiTypedefRangeInLeafStatement() throws IOException, ParserException {
+
+        YangNode node = manager
+                .getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefRangeInLeafStatement.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // check leaf type
+        assertThat(leafInfo.getName(), is("lowerDecimal"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("midDecimal"));
+        YangType<YangDerivedInfo> derivedInfoType = (YangType<YangDerivedInfo>) leafInfo.getDataType();
+        assertThat(derivedInfoType.getDataType(), is(YangDataTypes.DERIVED));
+        YangDerivedInfo derivedInfo = (YangDerivedInfo) derivedInfoType.getDataTypeExtendedInfo();
+
+        // Check range restriction
+        YangRangeRestriction rangeRestriction = (YangRangeRestriction) derivedInfo.getResolvedExtendedInfo();
+        ListIterator<YangRangeInterval> rangeListIterator = rangeRestriction.getAscendingRangeIntervals()
+                .listIterator();
+        YangRangeInterval rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(1.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+
+        // check previous typedef
+        YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(prevTypedef.getName(), is("midDecimal"));
+        YangType type = prevTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DERIVED));
+        derivedInfo = (YangDerivedInfo) type.getDataTypeExtendedInfo();
+
+        // check top typedef
+        YangTypeDef topTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(topTypedef.getName(), is("topDecimal"));
+        type = topTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DECIMAL64));
+        assertThat(type.getDataTypeName(), is("decimal64"));
+        YangType<YangDecimal64> decimal64Type = (YangType<YangDecimal64>) type;
+        YangDecimal64 decimal64 = decimal64Type.getDataTypeExtendedInfo();
+        assertThat(decimal64.getFractionDigit(), is(4));
+    }
+
+    /**
+     * Checks decimal64 with multiple typedef with multiple range statement.
+     * Having more restricted range at leaf.
+     */
+    @Test
+    public void processDecimal64MultiTypedefMultipleRangeStatement() throws IOException, ParserException {
+
+        YangNode node = manager
+                .getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefMultiRangeStatement.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // check leaf type
+        assertThat(leafInfo.getName(), is("lowerDecimal"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("midDecimal"));
+        YangType<YangDerivedInfo> derivedInfoType = (YangType<YangDerivedInfo>) leafInfo.getDataType();
+        assertThat(derivedInfoType.getDataType(), is(YangDataTypes.DERIVED));
+        YangDerivedInfo derivedInfo = (YangDerivedInfo) derivedInfoType.getDataTypeExtendedInfo();
+
+        // Check range restriction
+        YangRangeRestriction rangeRestriction = (YangRangeRestriction) derivedInfo.getResolvedExtendedInfo();
+
+        ListIterator<YangRangeInterval> rangeListIterator = rangeRestriction.getAscendingRangeIntervals()
+                .listIterator();
+        YangRangeInterval rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(4.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(11.0));
+
+        // check previous typedef
+        YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(prevTypedef.getName(), is("midDecimal"));
+        YangType type = prevTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DERIVED));
+        derivedInfo = (YangDerivedInfo) type.getDataTypeExtendedInfo();
+
+        // check top typedef
+        YangTypeDef topTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(topTypedef.getName(), is("topDecimal"));
+        type = topTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DECIMAL64));
+        assertThat(type.getDataTypeName(), is("decimal64"));
+        YangType<YangDecimal64> decimal64Type = (YangType<YangDecimal64>) type;
+        YangDecimal64 decimal64 = decimal64Type.getDataTypeExtendedInfo();
+        assertThat(decimal64.getFractionDigit(), is(4));
+
+        // Check range restriction
+        rangeRestriction = (YangRangeRestriction) decimal64.getRangeRestrictedExtendedInfo();
+        rangeListIterator = rangeRestriction.getAscendingRangeIntervals().listIterator();
+        rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(1.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+    }
+
+    /**
+     * Checks decimal64 with multiple typedef with multiple range statement.
+     * But having more restricted range at top of typedef.
+     */
+    @Test
+    public void processDecimal64MultiTypedefMultiInvalidRangeStatement() throws IOException, LinkerException {
+        thrown.expect(LinkerException.class);
+        thrown.expectMessage(" Range interval doesn't fall within the referred restriction ranges");
+
+        manager.getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefMultiInvalidRangeStatement.yang");
+    }
+
+    /**
+     * Checks decimal64 with multiple typedef with max range statement.
+     */
+    @Test
+    public void processDecimal64MultiTypedefWithMaxRange() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/decimal64/Decimal64MultiTypedefWithMaxRange.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        // check leaf type
+        assertThat(leafInfo.getName(), is("lowerDecimal"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("midDecimal"));
+        YangType<YangDerivedInfo> derivedInfoType = (YangType<YangDerivedInfo>) leafInfo.getDataType();
+        assertThat(derivedInfoType.getDataType(), is(YangDataTypes.DERIVED));
+        YangDerivedInfo derivedInfo = (YangDerivedInfo) derivedInfoType.getDataTypeExtendedInfo();
+
+        // Check range restriction
+        YangRangeRestriction rangeRestriction = (YangRangeRestriction) derivedInfo.getResolvedExtendedInfo();
+
+        ListIterator<YangRangeInterval> rangeListIterator = rangeRestriction.getAscendingRangeIntervals()
+                .listIterator();
+        YangRangeInterval rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(4.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+
+        // check previous typedef
+        YangTypeDef prevTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(prevTypedef.getName(), is("midDecimal"));
+        YangType type = prevTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DERIVED));
+        derivedInfo = (YangDerivedInfo) type.getDataTypeExtendedInfo();
+
+        // check top typedef
+        YangTypeDef topTypedef = (YangTypeDef) derivedInfo.getReferredTypeDef();
+        assertThat(topTypedef.getName(), is("topDecimal"));
+        type = topTypedef.getTypeList().iterator().next();
+        assertThat(type.getDataType(), is(YangDataTypes.DECIMAL64));
+        assertThat(type.getDataTypeName(), is("decimal64"));
+        YangType<YangDecimal64> decimal64Type = (YangType<YangDecimal64>) type;
+        YangDecimal64 decimal64 = decimal64Type.getDataTypeExtendedInfo();
+        assertThat(decimal64.getFractionDigit(), is(4));
+
+        // Check range restriction
+        rangeRestriction = (YangRangeRestriction) decimal64.getRangeRestrictedExtendedInfo();
+        rangeListIterator = rangeRestriction.getAscendingRangeIntervals().listIterator();
+        rangeInterval = rangeListIterator.next();
+        assertThat(((YangDecimal64) rangeInterval.getStartValue()).getValue().doubleValue(), is(1.0));
+        assertThat(((YangDecimal64) rangeInterval.getEndValue()).getValue().doubleValue(), is(12.0));
+    }
 }
diff --git a/utils/yangutils/plugin/src/test/resources/BitTypedefReferredLeafStatement.yang b/utils/yangutils/plugin/src/test/resources/BitTypedefReferredLeafStatement.yang
new file mode 100644
index 0000000..cda6381
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/BitTypedefReferredLeafStatement.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef topBits { 
+        type bits {
+             bit disable-nagle {
+                 position 0;
+             }
+             bit auto-sense-speed {
+                 position 1;
+             }
+             bit Mb-only {
+                 position 2;
+             }
+         }
+    }
+
+    leaf myBits {
+        type topBits;
+    }
+}
diff --git a/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiInvalidRangeStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiInvalidRangeStatement.yang
new file mode 100644
index 0000000..966b387
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiInvalidRangeStatement.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+
+    typedef topDecimal {
+         type decimal64 {
+            fraction-digits 4;
+            range 4..11;
+         }
+    }
+
+    typedef midDecimal {
+         type topDecimal;
+    }
+
+    leaf lowerDecimal {
+         type midDecimal {
+            range 1..12;
+         }
+    }
+}
diff --git a/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiRangeStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiRangeStatement.yang
new file mode 100644
index 0000000..76f215a
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefMultiRangeStatement.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+
+    typedef topDecimal {
+         type decimal64 {
+            fraction-digits 4;
+            range 1..12;
+         }
+    }
+
+    typedef midDecimal {
+         type topDecimal;
+    }
+
+    leaf lowerDecimal {
+         type midDecimal {
+            range 4..11;
+         }
+    }
+}
diff --git a/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeInLeafStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeInLeafStatement.yang
new file mode 100644
index 0000000..eea48f4
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeInLeafStatement.yang
@@ -0,0 +1,21 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+
+    typedef topDecimal {
+         type decimal64 {
+            fraction-digits 4;
+         }
+    }
+
+    typedef midDecimal {
+         type topDecimal;
+    }
+
+    leaf lowerDecimal {
+         type midDecimal {
+            range 1..12;
+         }
+    }
+}
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeStatement.yang
similarity index 69%
copy from utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang
copy to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeStatement.yang
index fdce08e..b4c0a36 100644
--- a/utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefRangeStatement.yang
@@ -6,14 +6,15 @@
     typedef topDecimal {
          type decimal64 {
             fraction-digits 4; 
+            range 1..12;
          }
     }
 
-    typedef validDecimal {
+    typedef midDecimal {
          type topDecimal;
     }
 
-    leaf setFourDecimal {
-         type validDecimal;
+    leaf lowerDecimal {
+         type midDecimal;
     } 
 }
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefStatement.yang
similarity index 73%
rename from utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefStatement.yang
index fdce08e..8682aac 100644
--- a/utils/yangutils/plugin/src/test/resources/Decimal64MultiTypedefStatement.yang
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefStatement.yang
@@ -9,11 +9,11 @@
          }
     }
 
-    typedef validDecimal {
+    typedef midDecimal {
          type topDecimal;
     }
 
-    leaf setFourDecimal {
-         type validDecimal;
+    leaf lowerDecimal {
+         type midDecimal;
     } 
 }
diff --git a/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefWithMaxRange.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefWithMaxRange.yang
new file mode 100644
index 0000000..405d08c
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64MultiTypedefWithMaxRange.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+
+    typedef topDecimal {
+         type decimal64 {
+            fraction-digits 4;
+            range 1..12;
+         }
+    }
+
+    typedef midDecimal {
+         type topDecimal;
+    }
+
+    leaf lowerDecimal {
+         type midDecimal {
+            range 4..max;
+         }
+    } 
+}
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMaxValueFraction.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMaxValueFraction.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMaxValueFraction.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMaxValueFraction.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMinValueFraction1.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction1.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMinValueFraction1.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction1.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMinValueFraction2.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction2.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidMinValueFraction2.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidMinValueFraction2.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidRangeStmnt.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidRangeStmnt.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeInvalidRangeStmnt.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeInvalidRangeStmnt.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeStatement.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeStatement.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeStatement.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeValidation.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeValidation.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeValidation.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeValidation.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeWithMultiValueRangeStmnt.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithMultiValueRangeStmnt.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeWithMultiValueRangeStmnt.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithMultiValueRangeStmnt.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeWithRangeStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithRangeStatement.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeWithRangeStatement.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithRangeStatement.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypeWithoutFraction.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithoutFraction.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypeWithoutFraction.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypeWithoutFraction.yang
diff --git a/utils/yangutils/plugin/src/test/resources/Decimal64TypedefStatement.yang b/utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypedefStatement.yang
similarity index 100%
rename from utils/yangutils/plugin/src/test/resources/Decimal64TypedefStatement.yang
rename to utils/yangutils/plugin/src/test/resources/decimal64/Decimal64TypedefStatement.yang
diff --git a/utils/yangutils/plugin/src/test/resources/interfileietf/ietf-te-topology.yang b/utils/yangutils/plugin/src/test/resources/interfileietf/ietf-te-topology.yang
index 10b6c11..5b65dff 100644
--- a/utils/yangutils/plugin/src/test/resources/interfileietf/ietf-te-topology.yang
+++ b/utils/yangutils/plugin/src/test/resources/interfileietf/ietf-te-topology.yang
@@ -1723,7 +1723,6 @@
        uses tet:te-link-state-derived;
      }
 
-     
      augment "/te-link-event/te-link-attributes/underlay" {
        description "Add state attributes to te-link underlay.";
        uses te-link-state-underlay-attributes;