created a password-has-numbers constraint

mRemoteNGTests/Security/PasswordCreation/PasswordIncludesNumbersConstraintTests.cs

@@ -0,0 +1,43 @@
+using System;
+using mRemoteNG.Security;
+using mRemoteNG.Security.PasswordCreation;
+using NUnit.Framework;
+
+
+namespace mRemoteNGTests.Security.PasswordCreation
+{
+    public class PasswordIncludesNumbersConstraintTests
+    {
+        private PasswordIncludesNumbersConstraint _includesNumbersConstraint;
+
+        [Test]
+        public void PasswordWithANumberPassesConstraint()
+        {
+            var password = "hello1".ConvertToSecureString();
+            _includesNumbersConstraint = new PasswordIncludesNumbersConstraint();
+            Assert.That(_includesNumbersConstraint.Validate(password), Is.True);
+        }
+
+        [Test]
+        public void PasswordWithFewerThanTheMinimumCountOfNumbersFailsConstraint()
+        {
+            var password = "hello1".ConvertToSecureString();
+            _includesNumbersConstraint = new PasswordIncludesNumbersConstraint(2);
+            Assert.That(_includesNumbersConstraint.Validate(password), Is.False);
+        }
+
+        [Test]
+        public void PasswordWithoutNumbersFailsConstraint()
+        {
+            var password = "hello".ConvertToSecureString();
+            _includesNumbersConstraint = new PasswordIncludesNumbersConstraint();
+            Assert.That(_includesNumbersConstraint.Validate(password), Is.False);
+        }
+
+        [Test]
+        public void CountOfNumbersToRequireMustBeAPositiveValue()
+        {
+            Assert.Throws<ArgumentException>(() => new PasswordIncludesNumbersConstraint(-1));
+        }
+    }
+}