1 files changed, 51 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers.Test/RepeatedFieldTest.cs b/csharp/src/ProtocolBuffers.Test/RepeatedFieldTest.cs
new file mode 100644
index 00000000..cbe79294
--- /dev/null
+++ b/csharp/src/ProtocolBuffers.Test/RepeatedFieldTest.cs
@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using Google.Protobuf.Collections;
+using NUnit.Framework;
+
+namespace Google.Protobuf
+{
+    public class RepeatedFieldTest
+    {
+        [Test]
+        public void NullValuesRejected()
+        {
+            var list = new RepeatedField<string>();
+            Assert.Throws<ArgumentNullException>(() => list.Add((string) null));
+            Assert.Throws<ArgumentNullException>(() => list.Add((IEnumerable<string>) null));
+            Assert.Throws<ArgumentNullException>(() => list.Add((RepeatedField<string>)null));
+            Assert.Throws<ArgumentNullException>(() => list.Contains(null));
+            Assert.Throws<ArgumentNullException>(() => list.IndexOf(null));
+        }
+
+        [Test]
+        public void Add_SingleItem()
+        {
+            var list = new RepeatedField<string>();
+            list.Add("foo");
+            Assert.AreEqual(1, list.Count);
+            Assert.AreEqual("foo", list[0]);
+        }
+
+        [Test]
+        public void Add_Sequence()
+        {
+            var list = new RepeatedField<string>();
+            list.Add(new[] { "foo", "bar" });
+            Assert.AreEqual(2, list.Count);
+            Assert.AreEqual("foo", list[0]);
+            Assert.AreEqual("bar", list[1]);
+        }
+
+        [Test]
+        public void Add_RepeatedField()
+        {
+            var list = new RepeatedField<string> { "original" };
+            list.Add(new RepeatedField<string> { "foo", "bar" });
+            Assert.AreEqual(3, list.Count);
+            Assert.AreEqual("original", list[0]);
+            Assert.AreEqual("foo", list[1]);
+            Assert.AreEqual("bar", list[2]);
+        }
+    }
+}