armstrong-numbers: add generator

Author: ErikSchierboom

exercises/practice/armstrong-numbers/.meta/Generator.tpl

@@ -0,0 +1,12 @@
+using Xunit;
+
+public class ArmstrongNumbersTests
+{
+    {{for test in tests}}
+    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
+    public void {{test.methodName}}()
+    {
+        Assert.{{test.expected ? "True" : "False"}}(ArmstrongNumbers.IsArmstrongNumber({{test.input.number}}));
+    }
+    {{end}}
+}