Initial Commit

java/hamming/src/main/java/Hamming.java

@@ -0,0 +1,2 @@
+public class Hamming {
+}

java/hamming/src/test/java/HammingTest.java

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+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class HammingTest {
+    
+    @Test
+    public void testNoDifferenceBetweenIdenticalStrands() {
+        assertThat(Hamming.compute("A", "A"), is(0));
+    }
+
+    @Test
+    public void testCompleteHammingDistanceOfForSingleNucleotideStrand() {
+        assertThat(Hamming.compute("A", "G"), is(1));
+    }
+
+    @Test
+    public void testCompleteHammingDistanceForSmallStrand() {
+        assertThat(Hamming.compute("AG", "CT"), is(2)); 
+    }
+
+    @Test
+    public void testSmallHammingDistance() {
+        assertThat(Hamming.compute("AT", "CT"), is(1));
+    }
+
+    @Test
+    public void testSmallHammingDistanceInLongerStrand() {
+        assertThat(Hamming.compute("GGACG", "GGTCG"), is(1));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testValidatesFirstStrandNotLonger() {
+        Hamming.compute("AAAG", "AAA");
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testValidatesOtherStrandNotLonger() {
+        Hamming.compute("AAA", "AAAG");
+    }
+
+    @Test
+    public void testLargeHammingDistance() {
+        assertThat(Hamming.compute("GATACA", "GCATAA"), is(4));
+    }
+
+    @Test
+    public void testHammingDistanceInVeryLongStrand() {
+        assertThat(Hamming.compute("GGACGGATTCTG", "AGGACGGATTCT"), is(9));
+    }
+
+}