add more whitespace sensitive ISource types knowing about the XML spec

see #39

RELEASE_NOTES.md

@@ -12,8 +12,9 @@
   [#38](https://github.com/xmlunit/xmlunit.net/issues/38). And neither
   of the methods could deal with `XmlSignificantWhitespace` at all.
 
-* add `XmlWhitespaceStrippedSource` that only trims characters that
-  are considered whitespace by the [XML
+* add `XmlWhitespaceStrippedSource`, `XmlWhitespaceNormalizedSource`
+  and `XmlElementContentWhitespaceStrippedSource` that only trim
+  characters that are considered whitespace by the [XML
   Specification](https://www.w3.org/TR/xml11/#NT-S) from textual
   content.
   Issue [#39](https://github.com/xmlunit/xmlunit.net/issues/39).

src/main/net-core/Input/ElementContentWhitespaceStrippedSource.cs

@@ -22,6 +22,11 @@ namespace Org.XmlUnit.Input {
     /// </summary>
     /// <remarks>
     ///   <para>
+    /// Unlike <see cref="XmlElementContentWhitespaceStrippedSource"/> this class uses
+    /// Unicode's idea of whitespace rather than the more restricted
+    /// subset considered whitespace by XML.
+    ///   </para>
+    ///   <para>
     ///   since XMLUnit 2.6.0
     ///   </para>
     /// </remarks>

src/main/net-core/Input/WhitespaceNormalizedSource.cs

@@ -21,9 +21,20 @@ namespace Org.XmlUnit.Input {
     /// all empty text nodes and normalizing the non-empty ones.
     /// </summary>
     /// <remarks>
+    ///   <para>
     /// "normalized" in this context means all whitespace characters
     /// are replaced by space characters and consecutive whitespace
     /// characters are collapsed.
+    ///   </para>
+    ///   <para>
+    /// This class is similiar to <see cref="WhitespaceStrippedSource"/>
+    /// but in addition "normalizes" whitespace.
+    ///   </para>
+    ///   <para>
+    /// Unlike <see cref="XmlWhitespaceNormalizedSource"/> this class uses
+    /// Unicode's idea of whitespace rather than the more restricted
+    /// subset considered whitespace by XML.
+    ///   </para>
     /// </remarks>
     public class WhitespaceNormalizedSource : DOMSource {
         /// <summary>

src/main/net-core/Input/WhitespaceStrippedSource.cs

@@ -27,6 +27,11 @@ namespace Org.XmlUnit.Input {
     /// other text nodes alone you should use
     /// ElementContentWhitespaceStrippedSource instead.
     ///   </para>
+    ///   <para>
+    /// Unlike <see cref="XmlWhitespaceStrippedSource"/> this class uses
+    /// Unicode's idea of whitespace rather than the more restricted
+    /// subset considered whitespace by XML.
+    ///   </para>
     /// </remarks>
     public class WhitespaceStrippedSource : DOMSource {
         /// <summary>

src/main/net-core/Input/XmlElementContentWhitespaceStrippedSource.cs

@@ -0,0 +1,44 @@
+/*
+  This file is licensed to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+using Org.XmlUnit.Util;
+
+namespace Org.XmlUnit.Input {
+
+    /// <summary>
+    /// A source that is obtained from a different source by removing all
+    /// text nodes that only contain whitespace.
+    /// </summary>
+    /// <remarks>
+    ///   <para>
+    /// Unlike <see cref="ElementContentWhitespaceStrippedSource"/>
+    /// this class uses XML's idea of whitespace rather than the more
+    /// extensive set considered whitespace by Unicode.
+    ///   </para>
+    ///   <para>
+    ///   since XMLUnit 2.10.0
+    ///   </para>
+    /// </remarks>
+    public class XmlElementContentWhitespaceStrippedSource : DOMSource {
+        /// <summary>
+        /// Creates a new source that consists of the given source with all
+        /// text nodes that only contain whitespace stripped.
+        /// </summary>
+        /// <param name="originalSource">source with the original content</param>
+        public XmlElementContentWhitespaceStrippedSource(ISource originalSource) :
+            base(Nodes.StripXmlElementContentWhitespace(originalSource.ToDocument())) {
+            SystemId = originalSource.SystemId;
+        }
+    }
+}

src/main/net-core/Input/XmlWhitespaceNormalizedSource.cs

@@ -0,0 +1,53 @@
+/*
+  This file is licensed to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+using Org.XmlUnit.Util;
+
+namespace Org.XmlUnit.Input {
+
+    /// <summary>
+    /// A source that is obtained from a different source by removing
+    /// all empty text nodes and normalizing the non-empty ones.
+    /// </summary>
+    /// <remarks>
+    ///   <para>
+    /// "normalized" in this context means all XML whitespace
+    /// characters are replaced by space characters and
+    /// consecutive XML whitespace characters are collapsed.
+    ///   </para>
+    ///   <para>
+    /// This class is similiar to <see cref="XmlWhitespaceStrippedSource"/>
+    /// but in addition "normalizes" XML whitespace.
+    ///   </para>
+    ///   <para>
+    /// Unlike <see cref="WhitespaceNormalizedSource"/> this uses XML's idea
+    /// of whitespace rather than the more extensive set considered
+    /// whitespace by Unicode.
+    ///   </para>
+    ///   <para>
+    /// since XMLUnit 2.10.0
+    ///   </para>
+    /// </remarks>
+    public class XmlWhitespaceNormalizedSource : DOMSource {
+        /// <summary>
+        /// Creates a new Source with the same content as another source normalizing XML whitespace in Text nodes.
+        /// </summary>
+        /// <param name="originalSource">source with the original content</param>
+        public XmlWhitespaceNormalizedSource(ISource originalSource) :
+            base(Nodes.NormalizeXmlWhitespace(originalSource.ToDocument()))
+            {
+            SystemId = originalSource.SystemId;
+        }
+    }
+}

src/main/net-core/Input/XmlWhitespaceStrippedSource.cs

@@ -30,6 +30,11 @@ namespace Org.XmlUnit.Input {
     /// ElementContentWhitespaceStrippedSource instead.
     ///   </para>
     ///   <para>
+    /// Unlike <see cref="WhitespaceStrippedSource"/> this uses XML's idea
+    /// of whitespace rather than the more extensive set considered
+    /// whitespace by Unicode.
+    ///   </para>
+    ///   <para>
     /// since XMLUnit 2.10.0
     ///   </para>
     /// </remarks>

src/main/net-core/NetFramework/XMLUnit.Core.NetFramework.csproj

@@ -110,6 +110,8 @@
     <Compile Include="..\Input\StringSource.cs" />
     <Compile Include="..\Input\WhitespaceNormalizedSource.cs" />
     <Compile Include="..\Input\WhitespaceStrippedSource.cs" />
+    <Compile Include="..\Input\XmlElementContentWhitespaceStrippedSource.cs" />
+    <Compile Include="..\Input\XmlWhitespaceNormalizedSource.cs" />
     <Compile Include="..\Input\XmlWhitespaceStrippedSource.cs" />
     <Compile Include="..\ISource.cs" />
     <Compile Include="..\Transform\Transformation.cs" />

src/main/net-core/Util/Nodes.cs

@@ -130,7 +130,7 @@ public static class Nodes {
         ///   <para>
         /// "normalized" in this context means all whitespace
         /// characters are replaced by space characters and
-        /// consecutive whitespace characaters are collapsed.
+        /// consecutive whitespace characters are collapsed.
         ///   </para>
         ///   <para>
         /// This method is similiar to <see cref="StripWhitespace"/>
@@ -159,7 +159,7 @@ public static class Nodes {
         ///   <para>
         /// "normalized" in this context means all XML whitespace
         /// characters are replaced by space characters and
-        /// consecutive XML whitespace characaters are collapsed.
+        /// consecutive XML whitespace characters are collapsed.
         ///   </para>
         ///   <para>
         /// This method is similiar to <see cref="StripXmlWhitespace"/>