Add tests for the ParameterCollection class

Author: cedx

test/ParameterCollection.Tests.cs

@@ -0,0 +1,62 @@
+namespace Belin.Sql;
+
+using System.Data;
+
+/// <summary>
+/// Tests the features of the <see cref="ParameterCollection"/> class.
+/// </summary>
+[TestClass]
+public sealed class ParameterCollectionTests {
+
+	[TestMethod]
+	public void Constructor() {
+		var collection = new ParameterCollection();
+		IsEmpty(collection);
+
+		collection = new("?1", 123, DbType.Int32);
+		HasCount(1, collection);
+
+		var parameter = collection.First();
+		AreEqual("?1", parameter.Name);
+		AreEqual(123, parameter.Value);
+		AreEqual(DbType.Int32, parameter.DbType);
+
+		collection = new(("?1", 123, DbType.Int32), ("@Key", "Unique", DbType.AnsiString));
+		HasCount(2, collection);
+
+		parameter = collection.Last();
+		AreEqual("@Key", parameter.Name);
+		AreEqual("Unique", parameter.Value);
+		AreEqual(DbType.AnsiString, parameter.DbType);
+	}
+
+	[TestMethod]
+	public void Contains() {
+		var collection = new ParameterCollection("@Key");
+		IsTrue(collection.Contains("Key"));
+		IsTrue(collection.Contains("@Key"));
+		IsFalse(collection.Contains("Foo"));
+		IsFalse(collection.Contains("@Foo"));
+	}
+
+	[TestMethod]
+	public void IndexOf() {
+		var collection = new ParameterCollection(("?1", 123), ("@Key", "Unique"));
+		AreEqual(1, collection.IndexOf("Key"));
+		AreEqual(1, collection.IndexOf("@Key"));
+		AreEqual(-1, collection.IndexOf("Foo"));
+		AreEqual(-1, collection.IndexOf("@Foo"));
+	}
+
+	[TestMethod]
+	public void RemoveAt() {
+		var collection = new ParameterCollection(("?1", 123), ("@Key", "Unique"));
+		HasCount(2, collection);
+
+		collection.RemoveAt("Key");
+		HasCount(1, collection);
+		Throws<ArgumentOutOfRangeException>(() => collection.RemoveAt("Foo"));
+		collection.RemoveAt("?1");
+		IsEmpty(collection);
+	}
+}