Merge pull request #1 from fracz/specs

Specifications for today's lab

Author: marcin7777

src/test/java/pl/edu/agh/mwo/invoice/InvoiceTest.java

@@ -0,0 +1,107 @@
+package pl.edu.agh.mwo.invoice;
+
+import java.math.BigDecimal;
+
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import pl.edu.agh.mwo.invoice.Invoice;
+import pl.edu.agh.mwo.invoice.product.DairyProduct;
+import pl.edu.agh.mwo.invoice.product.OtherProduct;
+import pl.edu.agh.mwo.invoice.product.Product;
+import pl.edu.agh.mwo.invoice.product.TaxFreeProduct;
+
+public class InvoiceTest {
+	private Invoice invoice;
+
+	@Before
+	public void createEmptyInvoiceForTheTest() {
+		invoice = new Invoice();
+	}
+
+	@Test
+	public void testEmptyInvoiceHasEmptySubtotal() {
+		Assert.assertThat(BigDecimal.ZERO, Matchers.comparesEqualTo(invoice.getSubtotal()));
+	}
+
+	@Test
+	public void testEmptyInvoiceHasEmptyTaxAmount() {
+		Assert.assertThat(BigDecimal.ZERO, Matchers.comparesEqualTo(invoice.getTax()));
+	}
+
+	@Test
+	public void testEmptyInvoiceHasEmptyTotal() {
+		Assert.assertThat(BigDecimal.ZERO, Matchers.comparesEqualTo(invoice.getTotal()));
+	}
+
+	@Test
+	public void testInvoiceHasTheSameSubtotalAndTotalIfTaxIsZero() {
+		Product taxFreeProduct = new TaxFreeProduct("Warzywa", new BigDecimal("199.99"));
+		invoice.addProduct(taxFreeProduct);
+		Assert.assertThat(invoice.getTotal(), Matchers.comparesEqualTo(invoice.getSubtotal()));
+	}
+
+	@Test
+	public void testInvoiceHasProperSubtotalForManyProducts() {
+		invoice.addProduct(new TaxFreeProduct("Owoce", new BigDecimal("200")));
+		invoice.addProduct(new DairyProduct("Maslanka", new BigDecimal("100")));
+		invoice.addProduct(new OtherProduct("Wino", new BigDecimal("10")));
+		Assert.assertThat(new BigDecimal("310"), Matchers.comparesEqualTo(invoice.getSubtotal()));
+	}
+
+	@Test
+	public void testInvoiceHasProperTaxValueForManyProduct() {
+		// tax: 0
+		invoice.addProduct(new TaxFreeProduct("Pampersy", new BigDecimal("200")));
+		// tax: 8
+		invoice.addProduct(new DairyProduct("Kefir", new BigDecimal("100")));
+		// tax: 2.30
+		invoice.addProduct(new OtherProduct("Piwko", new BigDecimal("10")));
+		Assert.assertThat(new BigDecimal("10.30"), Matchers.comparesEqualTo(invoice.getTax()));
+	}
+
+	@Test
+	public void testInvoiceHasProperTotalValueForManyProduct() {
+		// price with tax: 200
+		invoice.addProduct(new TaxFreeProduct("Maskotki", new BigDecimal("200")));
+		// price with tax: 108
+		invoice.addProduct(new DairyProduct("Maslo", new BigDecimal("100")));
+		// price with tax: 12.30
+		invoice.addProduct(new OtherProduct("Chipsy", new BigDecimal("10")));
+		Assert.assertThat(new BigDecimal("320.30"), Matchers.comparesEqualTo(invoice.getTotal()));
+	}
+
+	@Test
+	public void testInvoiceHasPropoerSubtotalWithQuantityMoreThanOne() {
+		// 2x kubek - price: 10
+		invoice.addProduct(new TaxFreeProduct("Kubek", new BigDecimal("5")), 2);
+		// 3x kozi serek - price: 30
+		invoice.addProduct(new DairyProduct("Kozi Serek", new BigDecimal("10")), 3);
+		// 1000x pinezka - price: 10
+		invoice.addProduct(new OtherProduct("Pinezka", new BigDecimal("0.01")), 1000);
+		Assert.assertThat(new BigDecimal("50"), Matchers.comparesEqualTo(invoice.getSubtotal()));
+	}
+
+	@Test
+	public void testInvoiceHasPropoerTotalWithQuantityMoreThanOne() {
+		// 2x chleb - price with tax: 10
+		invoice.addProduct(new TaxFreeProduct("Chleb", new BigDecimal("5")), 2);
+		// 3x chedar - price with tax: 32.40
+		invoice.addProduct(new DairyProduct("Chedar", new BigDecimal("10")), 3);
+		// 1000x pinezka - price with tax: 12.30
+		invoice.addProduct(new OtherProduct("Pinezka", new BigDecimal("0.01")), 1000);
+		Assert.assertThat(new BigDecimal("54.70"), Matchers.comparesEqualTo(invoice.getTotal()));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testInvoiceWithZeroQuantity() {
+		invoice.addProduct(new TaxFreeProduct("Tablet", new BigDecimal("1678")), 0);
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testInvoiceWithNegativeQuantity() {
+		invoice.addProduct(new DairyProduct("Zsiadle mleko", new BigDecimal("5.55")), -1);
+	}
+}

src/test/java/pl/edu/agh/mwo/invoice/product/ProductTest.java

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+package pl.edu.agh.mwo.invoice.product;
+
+import java.math.BigDecimal;
+
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+import org.junit.Test;
+
+import pl.edu.agh.mwo.invoice.product.Product;
+
+public class ProductTest {
+	@Test
+	public void testProductNameIsCorrect() {
+		Product product = new OtherProduct("buty", new BigDecimal("100.0"));
+		Assert.assertEquals("buty", product.getName());
+	}
+
+	@Test
+	public void testProductPriceAndTaxWithDefaultTax() {
+		Product product = new OtherProduct("Ogorki", new BigDecimal("100.0"));
+		Assert.assertThat(new BigDecimal("100"), Matchers.comparesEqualTo(product.getPrice()));
+		Assert.assertThat(new BigDecimal("0.23"), Matchers.comparesEqualTo(product.getTaxPercent()));
+	}
+
+	@Test
+	public void testProductPriceAndTaxWithDairyProduct() {
+		Product product = new DairyProduct("Szarlotka", new BigDecimal("100.0"));
+		Assert.assertThat(new BigDecimal("100"), Matchers.comparesEqualTo(product.getPrice()));
+		Assert.assertThat(new BigDecimal("0.08"), Matchers.comparesEqualTo(product.getTaxPercent()));
+	}
+
+	@Test
+	public void testPriceWithTax() {
+		Product product = new DairyProduct("Oscypek", new BigDecimal("100.0"));
+		Assert.assertThat(new BigDecimal("108"), Matchers.comparesEqualTo(product.getPriceWithTax()));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testProductWithNullName() {
+		new OtherProduct(null, new BigDecimal("100.0"));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testProductWithEmptyName() {
+		new TaxFreeProduct("", new BigDecimal("100.0"));
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testProductWithNullPrice() {
+		new DairyProduct("Banany", null);
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void testProductWithNegativePrice() {
+		new TaxFreeProduct("Mandarynki", new BigDecimal("-1.00"));
+	}
+}