FizzBuzz in Java

discolo/FizzBuzz.java

@@ -0,0 +1,35 @@
+package es.rromero.kata3;
+
+public class FizzBuzz {
+
+	private static final String FIZZ = "Fizz";
+	private static final String BUZZ = "Buzz";
+
+	public String sayFizzBuzz(int num) {
+		StringBuilder sb = new StringBuilder();
+		String sNum = Integer.toString(num);
+		if(num % 3 == 0 || sNum.contains("3")) {
+			sb.append(FIZZ);
+		}
+		if(num % 5 == 0 || sNum.contains("5")) {
+			sb.append(BUZZ);
+		}
+		if(sb.length() == 0) {
+			sb.append(sNum);
+		}
+		return sb.toString();
+	}
+
+	public String printFrom1to100() {
+		StringBuilder sb = new StringBuilder();
+		for(int i = 1; i<=100; i++) {
+			sb.append(sayFizzBuzz(i)).append("\n");
+		}
+		return sb.toString();
+	}
+
+	public static void main(String[] args) {
+		FizzBuzz fb = new FizzBuzz();
+		System.out.println(fb.printFrom1to100());
+	}
+}

discolo/TestFizzBuzz.java

@@ -0,0 +1,46 @@
+package es.rromero.kata3;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+/**
+ * @author rromero
+ *
+ */
+public class TestFizzBuzz {
+
+	@Test
+	public void testSayNumber() {
+		FizzBuzz fb = new FizzBuzz();
+		assertEquals("1",fb.sayFizzBuzz(1));
+		assertEquals("2",fb.sayFizzBuzz(2));
+		assertEquals("4",fb.sayFizzBuzz(4));
+		assertEquals("41",fb.sayFizzBuzz(41));
+	}
+
+	@Test
+	public void testSayFizz() {
+		FizzBuzz fb = new FizzBuzz();
+		assertEquals("Fizz",fb.sayFizzBuzz(3));
+		assertEquals("Fizz",fb.sayFizzBuzz(9));
+		assertEquals("Fizz",fb.sayFizzBuzz(93));
+		assertEquals("Fizz",fb.sayFizzBuzz(31));
+	}
+
+	@Test
+	public void testSayBuzz() {
+		FizzBuzz fb = new FizzBuzz();
+		assertEquals("Buzz",fb.sayFizzBuzz(5));
+		assertEquals("Buzz",fb.sayFizzBuzz(10));
+		assertEquals("Buzz",fb.sayFizzBuzz(59));
+	}
+
+	@Test
+	public void testSayFizzBuzz() {
+		FizzBuzz fb = new FizzBuzz();
+		assertEquals("FizzBuzz",fb.sayFizzBuzz(35));
+		assertEquals("FizzBuzz",fb.sayFizzBuzz(15));
+		assertEquals("FizzBuzz",fb.sayFizzBuzz(55333555));
+	}
+}