18Tests.java

package com.gildedrose;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

public class GildedRoseTest {

	@Test
	public void AfterSellByDateDegradeDouble() {
		GildedRose app = checkItem("Any", 0, 10);
		assertEquals(8, app.items[0].quality);
	}

	@Test
	public void BeforeSellByDateDegradeSingle() {
		GildedRose app = checkItem("Any", 1, 10);
		assertEquals(9, app.items[0].quality);
	}

	@Test
	public void QualityOfItemNotNegative() {
		GildedRose app = checkItem("Any", 0, 0);
		assertEquals(0, app.items[0].quality);
	}

	@Test
	public void BrieImprovesWithAge() {
		GildedRose app = checkItem("Aged Brie", 0, 0);
		assertEquals(2, app.items[0].quality);
	}

	@Test
	public void QualityOfItemLimit50() {
		GildedRose app = checkItem("Aged Brie", 0, 50);
		assertEquals(50, app.items[0].quality);
	}

	@Test
	public void LegendarySulfuras() {
		GildedRose app = checkItem("Sulfuras, Hand of Ragnaros", 0, 80);
		assertEquals(80, app.items[0].quality);
	}

	@Test
	public void BackstageValueLosesAllQualityOnDate() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 0, 10);
		assertEquals(0, app.items[0].quality);
	}

	@Test
	public void BackstageValueLongBefore() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 100, 100);
		assertEquals(100, app.items[0].quality);
	}

	@Test
	public void BackstageValue10DaysBefore() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 8, 47);
		assertEquals(49, app.items[0].quality);
	}

	@Test
	public void BackstageValueTwoDaysBefore() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 2, 40);
		assertEquals(43, app.items[0].quality);
	}

	@Test
	public void Backstage1() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 10, 49);
		assertEquals(50, app.items[0].quality);
	}

	@Test
	public void Backstage2() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 5, 51);
		assertEquals(51, app.items[0].quality);
	}

	@Test
	public void Backstage3() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 13, 51);
		assertEquals(51, app.items[0].quality);
	}

	@Test
	public void Backstage4() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 15, 45);
		assertEquals(46, app.items[0].quality);
	}

	@Test
	public void Backstage5() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 5, 45);
		assertEquals(48, app.items[0].quality);
	}

	@Test
	public void Backstage6() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 5, 49);
		assertEquals(50, app.items[0].quality);
	}

	@Test
	public void Backstage7() {
		GildedRose app = checkItem("Backstage passes to a TAFKAL80ETC concert", 7, 52);
		assertEquals(52, app.items[0].quality);
	}

	@Test
	public void LegendarySulfuras2() {
		GildedRose app = checkItem("Sulfuras, Hand of Ragnaros", -1, 80);
		assertEquals(80, app.items[0].quality);
	}

	public GildedRose checkItem(String item, Integer sellin, Integer quality) {
		Item[] items = new Item[] { new Item(item, sellin, quality) };
		GildedRose app = new GildedRose(items);
		app.updateQuality();
		return app;
	}

}