Initial move from old twain-in-dotnet.

Tests/NTwain.Tests/Data/TWIdentityTest.cs

@@ -0,0 +1,54 @@
+using NTwain.Data;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using NTwain.Values;
+
+namespace NTwain.Tests.Data
+{
+    /// <summary>
+    ///This is a test class for TWIdentity and is intended
+    ///to contain all TWIdentityTest Unit Tests
+    ///</summary>
+    [TestClass]
+    public class TWIdentityTest
+    {
+        // the maxlength expects null terminator so at maxlength it's over the limit
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException), "String length not enforced.")]
+        public void Enforce_Manufacturer_String_Length()
+        {
+            TWIdentity target = new TWIdentity();
+
+            var overLength = TwainConst.String32;
+
+            string badString = new String('a', overLength);
+
+            target.Manufacturer = badString;
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException), "String length not enforced.")]
+        public void Enforce_ProductFamily_String_Length()
+        {
+            TWIdentity target = new TWIdentity();
+
+            var overLength = TwainConst.String32;
+
+            string badString = new String('a', overLength);
+            target.ProductFamily = badString;
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException), "String length not enforced.")]
+        public void Enforce_ProductName_String_Length()
+        {
+            TWIdentity target = new TWIdentity();
+
+            var overLength = TwainConst.String32;
+
+            string badString = new String('a', overLength);
+            target.ProductName = badString;
+        }
+    }
+}