triangle: add template

Author: ErikSchierboom

exercises/practice/triangle/.meta/Generator.tpl

@@ -0,0 +1,28 @@
+using Xunit;
+
+public class TriangleTests
+{
+    {{#test_cases_by_property.equilateral}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{test_method_name}}()
+    {
+        Assert.{{expected}}(Triangle.IsEquilateral({{input.sides.0}}, {{input.sides.1}}, {{input.sides.2}}));
+    }
+    {{/test_cases_by_property.equilateral}}
+
+    {{#test_cases_by_property.isosceles}}
+    [Fact(Skip = "Remove this Skip property to run this test")]
+    public void {{test_method_name}}()
+    {
+        Assert.{{expected}}(Triangle.IsIsosceles({{input.sides.0}}, {{input.sides.1}}, {{input.sides.2}}));
+    }
+    {{/test_cases_by_property.isosceles}}
+
+    {{#test_cases_by_property.scalene}}
+    [Fact(Skip = "Remove this Skip property to run this test")]
+    public void {{test_method_name}}()
+    {
+        Assert.{{expected}}(Triangle.IsScalene({{input.sides.0}}, {{input.sides.1}}, {{input.sides.2}}));
+    }
+    {{/test_cases_by_property.scalene}}
+}