created an additional oop class & tests

src/main/java/rocks/zipcode/io/quiz4/objectorientation/StringEvaluatorObject.java

@@ -0,0 +1,21 @@
+package rocks.zipcode.io.quiz4.objectorientation;
+
+/**
+ * @author leon on 19/12/2018.
+ */
+public class StringEvaluatorObject {
+    public StringEvaluatorObject(String str) {
+    }
+
+    public String[] getAllPrefixes() {
+        return null;
+    }
+
+    public String[] getCommonPrefixes(String secondInput) {
+        return null;
+    }
+
+    public String getLargestCommonPrefix(String secondInput) {
+        return null;
+    }
+}

src/test/java/rocks/zipcode/io/quiz4/objectorientation/stringevaluatorobject/GetAllPrefixes.java

@@ -0,0 +1,84 @@
+package rocks.zipcode.io.quiz4.objectorientation.stringevaluatorobject;
+
+import org.junit.Test;
+import rocks.zipcode.io.quiz4.fundamentals.StringEvaluator;
+import rocks.zipcode.io.quiz4.objectorientation.StringEvaluatorObject;
+import rocks.zipcode.io.quiz4.utils.TestUtils;
+
+/**
+ * @author leon on 11/12/2018.
+ */
+public class GetAllPrefixes {
+    @Test
+    public void test1() {
+        // given
+        String input = "A";
+        String[] expected = {input};
+        test(input, expected);
+    }
+
+    @Test
+    public void test2() {
+        // given
+        String input = "B";
+        String[] expected = {input};
+        test(input, expected);
+    }
+
+
+    @Test
+    public void test3() {
+        // given
+        String input = "AB";
+        String[] expected = {"A", "B", "AB"};
+        test(input, expected);
+    }
+
+
+    @Test
+    public void test4() {
+        // given
+        String input = "ABB";
+        String[] expected = {"A", "AB", "ABB", "B", "BB"};
+        test(input, expected);
+    }
+
+
+    @Test
+    public void test5() {
+        // given
+        String input = "AABB";
+        String[] expected = {"A", "AA", "AAB", "AABB", "AB", "ABB", "B", "BB"};
+        test(input, expected);
+    }
+
+
+    @Test
+    public void test6() {
+        // given
+        String input = "AnotherMethodToTest";
+        String[] expected = {
+                "A", "An", "Ano", "Anot", "Anoth", "Anothe", "Another", "AnotherM", "AnotherMe", "AnotherMet", "AnotherMeth", "AnotherMetho", "AnotherMethod", "AnotherMethodT", "AnotherMethodTo", "AnotherMethodToT", "AnotherMethodToTe", "AnotherMethodToTes", "AnotherMethodToTest",
+                "n", "no", "not", "noth", "nothe", "nother", "notherM", "notherMe", "notherMet", "notherMeth", "notherMetho", "notherMethod", "notherMethodT", "notherMethodTo", "notherMethodToT", "notherMethodToTe", "notherMethodToTes", "notherMethodToTest",
+                "o", "oT", "oTe", "oTes", "oTest", "od", "odT", "odTo", "odToT", "odToTe", "odToTes", "odToTest", "ot", "oth", "othe", "other", "otherM", "otherMe", "otherMet", "otherMeth", "otherMetho", "otherMethod", "otherMethodT", "otherMethodTo", "otherMethodToT", "otherMethodToTe", "otherMethodToTes", "otherMethodToTest",
+                "t", "th", "the", "ther", "therM", "therMe", "therMet", "therMeth", "therMetho", "therMethod", "therMethodT", "therMethodTo", "therMethodToT", "therMethodToTe", "therMethodToTes", "therMethodToTest", "tho", "thod", "thodT", "thodTo", "thodToT", "thodToTe", "thodToTes", "thodToTest",
+                "h", "he", "her", "herM", "herMe", "herMet", "herMeth", "herMetho", "herMethod", "herMethodT", "herMethodTo", "herMethodToT", "herMethodToTe", "herMethodToTes", "herMethodToTest", "ho", "hod", "hodT", "hodTo", "hodToT", "hodToTe", "hodToTes", "hodToTest",
+                "e", "er", "erM", "erMe", "erMet", "erMeth", "erMetho", "erMethod", "erMethodT", "erMethodTo", "erMethodToT", "erMethodToTe", "erMethodToTes", "erMethodToTest", "es", "est", "et", "eth", "etho", "ethod", "ethodT", "ethodTo", "ethodToT", "ethodToTe", "ethodToTes", "ethodToTest",
+                "r", "rM", "rMe", "rMet", "rMeth", "rMetho", "rMethod", "rMethodT", "rMethodTo", "rMethodToT", "rMethodToTe", "rMethodToTes", "rMethodToTest",
+                "M", "Me", "Met", "Meth", "Metho", "Method", "MethodT", "MethodTo", "MethodToT", "MethodToTe", "MethodToTes", "MethodToTest",
+                "T", "Te", "Tes", "Test", "To", "ToT", "ToTe", "ToTes", "ToTest",
+                "d", "dT", "dTo", "dToT", "dToTe", "dToTes", "dToTest",
+                "s", "st"};
+
+        test(input, expected);
+    }
+
+    private void test(String input, String[] expected) {
+        // when
+        String[] actual = new StringEvaluatorObject(input).getAllPrefixes();
+
+        // then
+        TestUtils.assertArrayEquals(expected, actual);
+
+    }
+}

src/test/java/rocks/zipcode/io/quiz4/objectorientation/stringevaluatorobject/GetCommonPrefixesTest.java

@@ -0,0 +1,67 @@
+package rocks.zipcode.io.quiz4.objectorientation.stringevaluatorobject;
+
+import org.junit.Test;
+import rocks.zipcode.io.quiz4.fundamentals.StringEvaluator;
+import rocks.zipcode.io.quiz4.objectorientation.StringEvaluatorObject;
+import rocks.zipcode.io.quiz4.utils.TestUtils;
+
+/**
+ * @author leon on 11/12/2018.
+ */
+public class GetCommonPrefixesTest {
+    @Test
+    public void test1() {
+        // given
+        String firstInput = "AAB";
+        String secondInput = "AAAB";
+        String[] expected = {"A", "AA", "AAB", "AB", "B"};
+        test(firstInput, secondInput, expected);
+    }
+
+    @Test
+    public void test2() {
+        // given
+        String firstInput = "AAZB";
+        String secondInput = "AAAB";
+        String[] expected = {"A", "AA", "B"};
+        test(firstInput, secondInput, expected);
+    }
+
+
+    @Test
+    public void test3() {
+        // given
+        String firstInput = "Zapple";
+        String secondInput = "Candy apples!";
+        String[] expected = {"a", "ap", "app", "appl", "apple", "e", "l", "le", "p", "pl", "ple", "pp", "ppl", "pple"};
+        test(firstInput, secondInput, expected);
+    }
+
+
+    @Test
+    public void tes4() {
+        // given
+        String firstInput = "Irreducible complexity";
+        String secondInput = "Deductive operations";
+        String[] expected = {" ", "c", "d", "du", "duc", "e", "e ", "ed", "edu", "educ", "i", "o", "p", "r", "t", "u", "uc"};
+        test(firstInput, secondInput, expected);
+    }
+
+    @Test
+    public void test5() {
+        // given
+        String firstInput = "Peter piper picked a pepper";
+        String secondInput = "Jimmy neutron was a fancy scientist";
+        String[] expected = {" ", " a", " a ", "a", "a ", "c", "e", "i", "r", "t"};
+        test(firstInput, secondInput, expected);
+    }
+
+    private void test(String firstInput, String secondInput, String[] expected) {
+        // when
+        String[] actual = new StringEvaluatorObject(firstInput).getCommonPrefixes(secondInput);
+
+        // then
+        TestUtils.assertArrayEquals(expected, actual);
+    }
+
+}

src/test/java/rocks/zipcode/io/quiz4/objectorientation/stringevaluatorobject/GetLargestCommonPrefixTest.java

@@ -0,0 +1,61 @@
+package rocks.zipcode.io.quiz4.objectorientation.stringevaluatorobject;
+
+import org.junit.Assert;
+import org.junit.Test;
+import rocks.zipcode.io.quiz4.fundamentals.StringEvaluator;
+import rocks.zipcode.io.quiz4.objectorientation.StringEvaluatorObject;
+import rocks.zipcode.io.quiz4.utils.TestUtils;
+
+/**
+ * @author leon on 11/12/2018.
+ */
+public class GetLargestCommonPrefixTest {
+    @Test
+    public void test1() {
+        // given
+        String firstInput = "AAB";
+        String secondInput = "AAAB";
+        String expected = "AAB";
+        test(firstInput, secondInput, expected);
+    }
+
+    @Test
+    public void test2() {
+        // given
+        String firstInput = "AAZB";
+        String secondInput = "AAAB";
+        String expected = "AA";
+        test(firstInput, secondInput, expected);
+    }
+
+
+
+    @Test
+    public void test3() {
+        // given
+        String firstInput = "Zapple";
+        String secondInput = "Candy apples!";
+        String expected = "apple";
+        test(firstInput, secondInput, expected);
+    }
+
+
+
+    @Test
+    public void test4() {
+        // given
+        String firstInput = "Irreducible complexity";
+        String secondInput = "Deductive operations";
+        String expected = "educ";
+        test(firstInput, secondInput, expected);
+    }
+
+
+    private void test(String firstInput, String secondInput, String expected) {
+        // when
+        String actual = new StringEvaluatorObject(firstInput).getLargestCommonPrefix(secondInput);
+
+        // then
+        Assert.assertEquals(expected, actual);
+    }
+}