Add JmesPath matcher (#269)

* JmesPathMatcher

* netstandard1.3

* update System.Linq.Dynamic.Core

* simplyfy `double IsMatch(object input)`

src/WireMock.Net/Matchers/JmesPathMatcher.cs

@@ -0,0 +1,83 @@
+using DevLab.JmesPath;
+using JetBrains.Annotations;
+using Newtonsoft.Json;
+using System.Linq;
+using WireMock.Validation;
+
+namespace WireMock.Matchers
+{
+    /// <summary>
+    /// http://jmespath.org/
+    /// </summary>
+    public class JmesPathMatcher : IStringMatcher, IObjectMatcher
+    {
+        private readonly string[] _patterns;
+
+        /// <inheritdoc cref="IMatcher.MatchBehaviour"/>
+        public MatchBehaviour MatchBehaviour { get; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JmesPathMatcher"/> class.
+        /// </summary>
+        /// <param name="patterns">The patterns.</param>
+        public JmesPathMatcher([NotNull] params string[] patterns) : this(MatchBehaviour.AcceptOnMatch, patterns)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JmesPathMatcher"/> class.
+        /// </summary>
+        /// <param name="matchBehaviour">The match behaviour.</param>
+        /// <param name="patterns">The patterns.</param>
+        public JmesPathMatcher(MatchBehaviour matchBehaviour, [NotNull] params string[] patterns)
+        {
+            Check.NotNull(patterns, nameof(patterns));
+
+            MatchBehaviour = matchBehaviour;
+            _patterns = patterns;
+        }
+
+        /// <inheritdoc cref="IStringMatcher.IsMatch"/>
+        public double IsMatch(string input)
+        {
+            double match = MatchScores.Mismatch;
+            if (input != null)
+            {
+                try
+                {
+                    match = MatchScores.ToScore(_patterns.Select(pattern => bool.Parse(new JmesPath().Transform(input, pattern))));
+                }
+                catch (JsonException)
+                {
+                    // just ignore JsonException
+                }
+            }
+
+            return MatchBehaviourHelper.Convert(MatchBehaviour, match);
+        }
+
+        /// <inheritdoc cref="IObjectMatcher.IsMatch"/>
+        public double IsMatch(object input)
+        {
+            double match = MatchScores.Mismatch;
+
+            // When input is null or byte[], return Mismatch.
+            if (input != null && !(input is byte[]))
+            {
+                string inputAsString = JsonConvert.SerializeObject(input);
+                return IsMatch(inputAsString);
+            }
+
+            return MatchBehaviourHelper.Convert(MatchBehaviour, match);
+        }
+
+        /// <inheritdoc cref="IStringMatcher.GetPatterns"/>
+        public string[] GetPatterns()
+        {
+            return _patterns;
+        }
+
+        /// <inheritdoc cref="IMatcher.Name"/>
+        public string Name => "JmesPathMatcher";
+    }
+}