Add the tests of the Parameter class

Author: cedx

test/Parameter.Tests.cs

@@ -0,0 +1,28 @@
+namespace Belin.Sql;
+
+/// <summary>
+/// Tests the features of the <see cref="Parameter"/> class.
+/// </summary>
+[TestClass]
+public sealed class ParameterTests {
+
+	[TestMethod]
+	[DataRow("", "?")]
+	[DataRow("?", "?")]
+	[DataRow("?1", "?1")]
+	[DataRow("foo", "@foo")]
+	[DataRow("@bar", "@bar")]
+	[DataRow(":baz", ":baz")]
+	[DataRow("$qux", "$qux")]
+	public void Name(string name, string expected) => AreEqual(expected, new Parameter(name, null).Name);
+
+	[TestMethod]
+	public void Value() {
+		AreEqual(DBNull.Value, new Parameter("name", null).Value);
+		AreEqual(123, new Parameter("name", 123).Value);
+		AreEqual(-123.456, new Parameter("name", -123.456).Value);
+		AreEqual("", new Parameter("name", "").Value);
+		AreEqual("foo", new Parameter("name", "foo").Value);
+		AreEqual(DateTime.UnixEpoch, new Parameter("name", DateTime.UnixEpoch).Value);
+	}
+}