ReplaceTemplate tests

Author: RomanSoloweow

src/SimpleStateMachine.StructuralSearch.Tests/ReplaceTemplate/IfElseReplaceTemplate.txt

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+$var1$ $sign$ $value1$ ? $value1$ : $value2$;

src/SimpleStateMachine.StructuralSearch.Tests/ReplaceTemplate/IfValueIsNullReplaceTemplate.txt

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+$var$ ??= $value$;

src/SimpleStateMachine.StructuralSearch.Tests/ReplaceTemplateTests.cs

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+using System.IO;
+using System.Linq;
+using Xunit;
+
+namespace SimpleStateMachine.StructuralSearch.Tests
+{
+    public class ReplaceTemplateTests
+    {
+        [Theory]
+        [InlineData("ReplaceTemplate/IfElseReplaceTemplate.txt", 14)]
+        [InlineData("ReplaceTemplate/IfValueIsNullReplaceTemplate.txt", 6)]
+        public void TemplateParsingShouldBeSuccess(string templatePath, int stepsCount)
+        {
+            var replaceTemplate = File.ReadAllText(templatePath);
+            var replaceBuilder = StructuralSearch.ParseReplaceTemplate(replaceTemplate);
+            var result = replaceBuilder.Build();
+            
+            Assert.NotNull(replaceTemplate);
+            Assert.Equal(replaceBuilder.Steps.Count(), stepsCount);
+        }
+    }
+}