UKBankHolidayCalculatorTests.cs

using System;
using NUnit.Framework;

[TestFixture]
public class BankHolidayCalculatorTests
{
	[Test]
	[TestCase("Jan 1 2015")]
	[TestCase("Jan 1 2016")]
	[TestCase("Jan 2 2017")]
	[TestCase("Jan 1 2018")]
	[TestCase("Jan 1 2019")]
	[TestCase("Jan 1 2020")]
	public void should_be_january_bank_holiday(string date)
	{
		// Arrange
		DateTime dateTime = DateTime.Parse(date);
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsJanuaryBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.True);
	}

	[Test]
	public void should_not_be_january_bank_holiday()
	{
		// Arrange
		DateTime dateTime = DateTime.Parse("Jan 1 2017");
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.False);
	}

	[Test]
	[TestCase("May 4 2015")]
	[TestCase("May 25 2015")]
	[TestCase("May 2 2016")]
	[TestCase("May 30 2016")]
	[TestCase("May 1 2017")]
	[TestCase("May 29 2017")]
	public void should_be_may_bank_holiday(string date)
	{
		// Arrange
		DateTime dateTime = DateTime.Parse(date);
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.True);
	}

	[Test]
	public void should_not_be_may_bank_holiday()
	{
		// Arrange
		DateTime dateTime = DateTime.Parse("May 9 2017");
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.False);
	}

	[Test]
	[TestCase("August 31 2015")]
	[TestCase("August 29 2016")]
	[TestCase("August 28 2017")]
	[TestCase("August 27 2018")]
	public void should_be_august_bank_holiday(string date)
	{
		// Arrange
		DateTime dateTime = DateTime.Parse(date);
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsAugustBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.True);
	}

	[Test]
	public void should_not_be_august_bank_holiday()
	{
		// Arrange
		DateTime dateTime = DateTime.Parse("August 14 2017");
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.False);
	}

	[Test]
	[TestCase("6 April 2015")]
	[TestCase("28 March 2016")]
	[TestCase("17 April 2017")]
	[TestCase("2 April 2018")]
	[TestCase("22 April 2019")]
	[TestCase("13 April 2020")]
	public void should_be_easter_bank_holiday(string date)
	{
		// Arrange
		DateTime dateTime = DateTime.Parse(date);
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsEasterBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.True);
	}

	[Test]
	public void should_not_be_easter_bank_holiday()
	{
		// Arrange
		DateTime dateTime = DateTime.Parse("April 13 2015");
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.False);
	}

	[Test]
	[TestCase("26 December 2014")]
	[TestCase("28 December 2015")]
	[TestCase("27 December 2016")]
	[TestCase("26 December 2017")]
	[TestCase("26 December 2018")]
	[TestCase("26 December 2019")]
	[TestCase("26 December 2019")]
	[TestCase("28 December 2020")]
	public void should_be_december_bank_holiday(string date)
	{
		// Arrange
		DateTime dateTime = DateTime.Parse(date);
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsDecemberBankHoliday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.True);
	}

	[Test]
	public void should_not_be_december_bank_holiday()
	{
		// Arrange
		DateTime dateTime = DateTime.Parse("29 December 2014");
		BankHolidayCalculator calculator = new BankHolidayCalculator();

		// Act
		bool isBankHoliday = calculator.IsMayBankHolidayMonday(dateTime);

		// Assert
		Assert.That(isBankHoliday, Is.False);
	}
}