/TestSpss/SpssVariableTest.cs

using System;

using System.Linq;

using System.Diagnostics;

using Microsoft.VisualStudio.TestTools.UnitTesting;



namespace Spss.Testing

{

	/// <summary>

	/// Summary description for SpssVariableTest

	/// </summary>

	[TestClass]

    [DeploymentItem("x86", "x86")]

    [DeploymentItem("x64", "x64")]

    public class SpssVariableTest

	{

		public SpssVariableTest()

		{

		}



		[TestMethod]

		public void NewStringVariable()

		{

			SpssStringVariable var = new SpssStringVariable();

			var.Name = "new string";

		}



		[TestMethod]

		public void NewNumericVariable()

		{

			SpssNumericVariable var = new SpssNumericVariable();

			var.Name = "new numeric";

		}



		[TestMethod]

		public void NewDateVariable()

		{

			SpssDateVariable var = new SpssDateVariable();

			var.Name = "new date";

		}



		[TestMethod]

		[ExpectedException(typeof(ArgumentOutOfRangeException))]

		public void VarNameTooLong()

		{

			SpssVariable var = new SpssStringVariable();

			var.Name = new string('a', SpssSafeWrapper.SPSS_MAX_VARNAME + 1);

		}



		[TestMethod]

		[ExpectedException(typeof(ArgumentNullException))]

		public void VarNameToNull()

		{

			SpssVariable var = new SpssStringVariable();

			var.Name = null;

		}



		[TestMethod]

		[ExpectedException(typeof(ArgumentOutOfRangeException))]

		public void VarLabelTooLong()

		{

			SpssVariable var = new SpssStringVariable();

			var.Label = new string('a', SpssSafeWrapper.SPSS_MAX_VARLABEL + 1);

		}



		[TestMethod]

		public void VarLabelNeverNull()

		{

			SpssVariable var = new SpssStringVariable();

			Assert.IsNotNull(var.Label);

			var.Label = null;

			Assert.IsNotNull(var.Label);

			Assert.AreEqual(string.Empty, var.Label);

		}

		[TestMethod]

		public void SetStringValueLabels()

		{

			SpssStringVariable var = new SpssStringVariable();

			var.ValueLabels.Add("h", "hello");

			var.ValueLabels.Add("H", "hi");

			var.ValueLabels.Add("b", "bye");

			Assert.AreEqual("hello", var.ValueLabels["h"]);

			Assert.AreEqual("hi", var.ValueLabels["H"]);

			Assert.AreEqual(3, var.ValueLabels.Count);

		}

		[TestMethod]

		public void GetLongStringValueLabels()

		{

			using (SpssDataDocument docRead = SpssDataDocument.Open(TestBase.GoodFilename, SpssFileAccess.Read))

			{

				SpssStringVariable var = (SpssStringVariable)docRead.Variables["longStr"];

				// long strings can never have value labels

				Assert.AreEqual(0, var.ValueLabels.Count);

			}

		}

		[TestMethod]

		public void SetNumericValueLabels()

		{

			SpssNumericVariable var = new SpssNumericVariable();

			var.ValueLabels.Add(1, "Never");

			var.ValueLabels[2] = "Rarely";

			var.ValueLabels.Add(3, "Sometimes");

			var.ValueLabels.Add(4, "Often");

			var.ValueLabels.Add(5, "Very Often");

			Assert.AreEqual(5, var.ValueLabels.Count);

			Assert.AreEqual("Sometimes", var.ValueLabels[3]);

			Assert.AreEqual("Rarely", var.ValueLabels[2]);



			var.ValueLabels.Remove(4);

			Assert.IsFalse(var.ValueLabels.ContainsKey(4));

			Assert.AreEqual(4, var.ValueLabels.Count);

		}



		[TestMethod]

		[ExpectedException(typeof(ArgumentOutOfRangeException))]

		public void SetStringTooLong()

		{

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Append))

			{

				SpssStringVariable var = (SpssStringVariable)docAppend.Variables["charLabels"];

				Debug.Assert(var.Length == 8);

				SpssCase row = docAppend.Cases.New();

				row["charLabels"] = new string('a', var.Length + 1);

			}

		}

		[TestMethod]

		public void SetMissingValueNumeric()

		{

			int rowIndex;

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Append))

			{

				SpssCase row = docAppend.Cases.New();

				rowIndex = row.Position;

				row["num"] = double.NaN;

				row.Commit();

			}

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Read))

			{

				SpssCase row = docAppend.Cases[rowIndex];

				double val = (double)row["num"];

				Assert.AreEqual(double.NaN, val);

			}

		}

		[TestMethod]

		public void SetMissingValueNumericByNull()

		{

			int rowIndex;

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Append))

			{

				SpssCase row = docAppend.Cases.New();

				rowIndex = row.Position;

				row["num"] = null;

				row.Commit();

			}

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Read))

			{

				SpssCase row = docAppend.Cases[rowIndex];

				double? val = (double?)row["num"];

				Assert.IsFalse(val.HasValue);

			}

		}

		[TestMethod]

		public void SetMissingValueDateByNull()

		{

			int rowIndex;

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Append))

			{

				SpssCase row = docAppend.Cases.New();

				rowIndex = row.Position;

				row["dateVar"] = null;

				row.Commit();

			}

			using (SpssDataDocument docAppend = SpssDataDocument.Open(TestBase.AppendFilename, SpssFileAccess.Read))

			{

				SpssCase row = docAppend.Cases[rowIndex];

				DateTime? val = (DateTime?)row["dateVar"];

				Assert.IsFalse(val.HasValue);

			}

		}

		[TestMethod]

		public void ReadDecimalPlaces()

		{

			using (SpssDataDocument docRead = SpssDataDocument.Open(TestBase.GoodFilename, SpssFileAccess.Read))

			{

				SpssNumericVariable var = docRead.Variables[0] as SpssNumericVariable;

				Assert.IsNotNull(var, "First variable expected to be numeric.");

				Assert.AreEqual(2, var.WriteDecimal);

			}

		}

		[TestMethod]

		public void ReadLabel()

		{

			using (SpssDataDocument docRead = SpssDataDocument.Open(TestBase.GoodFilename, SpssFileAccess.Read))

			{

				SpssVariable var = docRead.Variables[0];

				Assert.AreEqual("on butter", var.Label);

			}

		}

		[TestMethod]

		public void ReadNullLabel()

		{

			using (SpssDataDocument docRead = SpssDataDocument.Open(TestBase.GoodFilename, SpssFileAccess.Read))

			{

				SpssVariable var = docRead.Variables[3];

				Assert.AreEqual(string.Empty, var.Label);

			}

		}

		[TestMethod]

		public void ReadNullValueLabels()

		{

			using (SpssDataDocument docRead = SpssDataDocument.Open(TestBase.GoodFilename, SpssFileAccess.Read))

			{

				SpssVariable var = docRead.Variables[3];

				Assert.IsFalse(var.GetValueLabels().Any());

			}

		}

	}

}