Curtis Cook's ArraysGoneWild Lab

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+    <entry file="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/org/junit/Assert.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="177">
+          <caret line="333" selection-start-line="333" selection-end-line="333" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/MaxMinTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="360">
+          <caret line="24" column="26" selection-start-line="24" selection-start-column="26" selection-end-line="24" selection-end-column="26" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/MaxMin.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="225">
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+          <folding>
+            <element signature="e#413#414#0" expanded="true" />
+            <element signature="e#439#440#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/SmallestFirstAndSecondTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="270">
+          <caret line="24" column="24" selection-start-line="24" selection-start-column="24" selection-end-line="24" selection-end-column="24" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/SmallestFirstAndSecond.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="195">
+          <caret line="13" column="9" selection-start-line="13" selection-start-column="9" selection-end-line="13" selection-end-column="9" />
+          <folding>
+            <element signature="e#732#733#0" expanded="true" />
+            <element signature="e#807#808#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/Arraz.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="648">
+          <caret line="229" column="29" lean-forward="true" selection-start-line="229" selection-start-column="29" selection-end-line="229" selection-end-column="29" />
+          <folding>
+            <element signature="imports" expanded="true" />
+            <element signature="e#3449#3450#0" expanded="true" />
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+            <element signature="e#6464#6473#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/ArrazTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="5348">
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+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+  </component>
+  <component name="masterDetails">
+    <states>
+      <state key="GlobalLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="JdkListConfigurable.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectJDKs.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+    </states>
+  </component>
+</project>

arraz/arraz.iml

@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_6">
     <output url="file://$MODULE_DIR$/target/classes" />
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>
-    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: junit:junit:4.0" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
   </component>
 </module>

arraz/pom.xml

@@ -7,11 +7,23 @@
     <groupId>rocks.zipcode.arraysgonewild</groupId>
     <artifactId>arraz</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>6</source>
+                    <target>6</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.0</version>
+            <version>4.12</version>
         </dependency>
     </dependencies>
 

arraz/src/main/java/Arraz.java

@@ -1,2 +1,232 @@
-public class Arraz {
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+
+public class Arraz<E> {
+
+    public int sumValuesOfArray(int[] ints) {
+        int sum = 0;
+        for (int x : ints) {
+            sum += x;
+        }
+        return sum;
+    }
+
+    public double sumDoublesOfArray(double[] doubles) {
+        double sum = 0;
+        for (double x : doubles) {
+            sum += x;
+        }
+        return sum;
+    }
+
+    public int averageOfArray(int[] ints) {
+        return sumValuesOfArray(ints) / ints.length;
+    }
+
+    public double doubleAverageOfArray(double[] doubles) {
+        return sumDoublesOfArray(doubles) / doubles.length;
+    }
+
+    public boolean containsValue(int[] ints, int i) {
+        for (int x : ints) {
+            if (x == i) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public int[] reverseArray(int[] ints) {
+        int[] reversedArray = new int[ints.length];
+        for (int i = ints.length - 1, j = 0; i >= 0; i--, j++) {
+            reversedArray[j] = ints[i];
+        }
+        return reversedArray;
+    }
+
+
+    public int findIndexOf(E[] array, E element) {
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equals(element)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    public E[] copyArrayByInterator(E[] array) {
+        E[] copyOfArray = (E[]) new Object[array.length];
+        List<E> list = new ArrayList<E>(array.length);
+        list.addAll(Arrays.asList(array));
+        Iterator iterator = list.iterator();
+        int index = 0;
+        while (iterator.hasNext()) {
+            copyOfArray[index] = (E) iterator.next();
+            index++;
+        }
+        return copyOfArray;
+    }
+
+    public E[] copyArrayByLoop(E[] array) {
+        E[] copyOfArray = (E[]) new Object[array.length];
+        for (int i = 0; i < array.length; i++) {
+            copyOfArray[i] = array[i];
+        }
+        return copyOfArray;
+    }
+
+    public E[] removeElementFromArray(E[] array, E element) {
+        E[] updatedArray = (E[]) new Object[array.length - 1];
+        for (int i = 0, j = 0; i < array.length; i++, j++) {
+            if (!array[i].equals(element)) {
+                updatedArray[j] = array[i];
+            } else {
+                j--;
+            }
+        }
+        return updatedArray;
+    }
+
+    public E[] insertIntoArrayAt(E[] array, int index, E element) {
+        E[] updatedArray = (E[]) new Object[array.length + 1];
+        for (int i = 0, j = 0; j < updatedArray.length; i++, j++) {
+            if (j != index) {
+                updatedArray[j] = array[i];
+            } else {
+                updatedArray[j] = element;
+                i--;
+            }
+        }
+        return updatedArray;
+    }
+
+    public Integer[] removeDupesFromArray(Integer[] ints) {
+        Set<Integer> integerSet = new TreeSet<Integer>();
+        integerSet.addAll(Arrays.asList(ints));
+        return integerSet.toArray(new Integer[0]);
+    }
+
+    public double find2ndLargestValueFromArray(double[] doubles) {
+        double max = 0;
+        double secondLargest = 0;
+        for (double x : doubles) if (x > max) max = x;
+        for (double y : doubles) if (y > secondLargest && y < max) secondLargest = y;
+        return secondLargest;
+    }
+
+    public E[] makeMeAnArrayFromArrayList(ArrayList<E> arrayList) {
+        return (E[]) arrayList.toArray();
+    }
+
+    public ArrayList<E> makeMeAnArrayListFromArray(E[] array) {
+        return new ArrayList<E>(Arrays.asList(array));
+    }
+
+    public boolean check2ArraysForEqual(E[] x, E[] y) {
+        if (x.length == y.length) {
+            for (int i = 0; i < x.length; i++) {
+                if (!x[i].equals(y[i])) {
+                    return false;
+                }
+            }
+        } else {
+            return false;
+        }
+        return true;
+    }
+
+    public int averageArrayWithoutMaxMin(int[] ints) {
+        MaxMin maxMin = new MaxMin(0,0);
+        maxMin.findMaxMinOfArray(ints);
+        int max = maxMin.getMax();
+        int min = maxMin.getMin();
+        int[] updatedArray = new int[ints.length - 2];
+        for (int i = 0, j = 0; i < ints.length; i++, j++) {
+            if (ints[i] != max && ints[i] != min) {
+                updatedArray[j] = ints[i];
+            } else {
+                j--;
+            }
+        }
+        return averageOfArray(updatedArray);
+    }
+
+    public boolean arrayHas65and77(int[] ints) {
+        return containsValue(ints, 65) && containsValue(ints, 77);
+    }
+
+    public boolean theTotalofTensIs30(int[] ints) {
+        int sumOfTens = 0;
+        for (int i : ints) {
+            if (i == 10) {
+                sumOfTens += i;
+            }
+        }
+        return sumOfTens == 30;
+    }
+
+    public int[] makeMeACopyPlease(int[] ints) {
+        return reverseArray(ints);
+    }
+
+    public E[] removeLastItemAndCopy(E[] elements) {
+        E[] updatedElements = (E[]) new Object[elements.length - 1];
+        for (int i = 0; i < updatedElements.length; i++) {
+            updatedElements[i] = elements[i];
+        }
+        return updatedElements;
+    }
+
+    public E[] removeFirstItemAndCopy(E[] elements) {
+        E[] updatedElements = (E[]) new Object[elements.length - 1];
+        for (int i = 1, j = 0; j < updatedElements.length; i++, j++) {
+            updatedElements[j] = elements[i];
+        }
+        return updatedElements;
+    }
+
+    public E[] insertAtStartAndCopy(E[] elements, E element) {
+        E[] updatedElements = (E[]) new Object[elements.length + 1];
+        updatedElements[0] = element;
+        for (int i = 0, j = 1; j < updatedElements.length; i++, j++) {
+            updatedElements[j] = elements[i];
+        }
+        return updatedElements;
+    }
+
+    public E[] insertAtEndAndCopy(E[] elements, E element) {
+        E[] updatedElements = (E[]) new Object[elements.length + 1];
+        for (int i = 0; i < elements.length; i++) {
+            updatedElements[i] = elements[i];
+        }
+        updatedElements[updatedElements.length - 1] = element;
+        return updatedElements;
+    }
+
+    public Integer[] sortArrayIntoEvensThenOdds(Integer[] integers) {
+        Integer[] updatedIntegers = new Integer[integers.length];
+        ArrayList<Integer> evenIntegers = new ArrayList<Integer>();
+        ArrayList<Integer> oddIntegers = new ArrayList<Integer>();
+        for (Integer i : integers) {
+            if (i % 2 == 0) {
+                evenIntegers.add(i);
+            } else {
+                oddIntegers.add(i);
+            }
+        }
+
+        for (int i = 0; i < evenIntegers.size(); i++) {
+            updatedIntegers[i] = evenIntegers.get(i);
+        }
+
+        for (int i = 0, j = evenIntegers.size(); i < oddIntegers.size(); i++, j++) {
+            updatedIntegers[j] = oddIntegers.get(i);
+        }
+        return updatedIntegers;
+    }
 }

arraz/src/main/java/MaxMin.java

@@ -0,0 +1,27 @@
+public class MaxMin {
+    private int max = 0;
+    private int min = 0;
+
+    public MaxMin(int max, int min) {
+        this.max = max;
+        this.min = min;
+    }
+
+    public MaxMin findMaxMinOfArray(int[] ints) {
+        min = ints[0];
+        for (int i : ints) {
+            if (i < min) min = i;
+
+            if (i > max) max = i;
+        }
+        return new MaxMin(max, min);
+    }
+
+    public int getMax() {
+        return max;
+    }
+
+    public int getMin() {
+        return min;
+    }
+}

arraz/src/main/java/OddEven.java

@@ -0,0 +1,28 @@
+public class OddEven {
+    public int odds = 0;
+    public int evens = 0;
+
+    public OddEven(int odds, int evens) {
+        this.odds = odds;
+        this.evens = evens;
+    }
+
+    public OddEven getOddEvensOfArray(int[] ints) {
+        for (int i : ints) {
+            if (i % 2 == 0) {
+                evens++;
+            } else {
+                odds++;
+            }
+        }
+        return new OddEven(odds, evens);
+    }
+
+    public int getOdds() {
+        return odds;
+    }
+
+    public int getEvens() {
+        return evens;
+    }
+}

arraz/src/main/java/SmallestFirstAndSecond.java

@@ -0,0 +1,29 @@
+public class SmallestFirstAndSecond {
+    private int smallest = 0;
+    private int secondSmallest = 0;
+
+    public SmallestFirstAndSecond(int smallest, int secondSmallest) {
+        this.smallest = smallest;
+        this.secondSmallest = secondSmallest;
+    }
+
+    public SmallestFirstAndSecond findSmallestAndSecondSmallest(int[] ints) {
+        smallest = ints[0];
+        for (int i : ints) {
+            if (i < smallest) smallest = i;
+        }
+        secondSmallest = ints[1];
+        for (int i : ints) {
+            if (i < secondSmallest && i > smallest) secondSmallest = i;
+        }
+        return new SmallestFirstAndSecond(smallest, secondSmallest);
+    }
+
+    public int getSmallest() {
+        return smallest;
+    }
+
+    public int getSecondSmallest() {
+        return secondSmallest;
+    }
+}

arraz/src/test/java/ArrazTest.java

@@ -1,5 +1,664 @@
-import static org.junit.Assert.*;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.ArrayList;
+
 
 public class ArrazTest {
+    Arraz arraz = new Arraz();
+
+    @Test
+    public void test1sumValuesOfArray() {
+        // Given
+        int[] x = {1, 2, 3, 4, 5};
+        int expected = x[0] + x[1] + x[2] + x[3] + x[4];
+
+        // When
+        int actual = arraz.sumValuesOfArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2sumValuesOfArray() {
+        // Given
+        int[] y = {99, 88, 77, 66, 55};
+        int expected = y[0] + y[1] + y[2] + y[3] + y[4];
+
+        // When
+        int actual = arraz.sumValuesOfArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+
+    }
+
+    @Test
+    public void test1sumDoublesOfArray() {
+        // Given
+        double[] x = {1.1, 2.2, 3.3, 4.4, 5.5};
+        double expected = x[0] + x[1] + x[2] + x[3] + x[4];
+
+        // When
+        double actual = arraz.sumDoublesOfArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test2sumDoublesOfArray() {
+        // Given
+        double[] y = {99.1, 88.2, 77.3, 66.4, 55.5};
+        double expected = y[0] + y[1] + y[2] + y[3] + y[4];
+
+        // When
+        double actual = arraz.sumDoublesOfArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test1averageOfArray() {
+        // Given
+        int[] x = {1, 2, 3, 4, 5};
+        int expected = (x[0] + x[1] + x[2] + x[3] + x[4]) / x.length;
+
+        // When
+        int actual = arraz.averageOfArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2averageOfArray() {
+        // Given
+        int[] y = {7, 4, 13, 19, 7};
+        int expected = (y[0] + y[1] + y[2] + y[3] + y[4]) / y.length;
+
+        // When
+        int actual = arraz.averageOfArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test1doubleAverageOfArray() {
+        // Given
+        double[] x = {11.7, 4.4, 8.13, 6.19};
+        double expected = (x[0] + x[1] + x[2] + x[3]) / x.length;
+
+        // When
+        double actual = arraz.doubleAverageOfArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test2doubleAverageOfArray() {
+        // Given
+        double[] y = {19.81, 19.88, 20.10, 20.15};
+        double expected = (y[0] + y[1] + y[2] + y[3]) / y.length;
+
+        // When
+        double actual = arraz.doubleAverageOfArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test1containsValue() {
+        // Given
+        int[] x = {1, 2, 3, 4, 5};
+        int y = 3;
+
+        // When
+        boolean actual = arraz.containsValue(x, y);
+
+        // Then
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test2containsValue() {
+        // Given
+        int[] x = {7, 4, 13, 19, 7};
+        int y = 99;
+
+        // When
+        boolean actual = arraz.containsValue(x, y);
+
+        // Then
+        Assert.assertFalse(actual);
+    }
+
+    @Test
+    public void test1reverseArray() {
+        // Given
+        int[] y = {7, 4, 13, 19, 7};
+        int[] expected = {y[4], y[3], y[2], y[1], y[0]};
+
+        // When
+        int[] actual = arraz.reverseArray(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2reverseArray() {
+        // Given
+        int[] x = {11, 22, 33, 44, 55};
+        int[] expected = {x[4], x[3], x[2], x[1], x[0]};
+
+        // When
+        int[] actual = arraz.reverseArray(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1findIndexOf() {
+        // Given
+        Integer[] x = {9, 8, 7, 6, 5};
+        int expected = 2;
+
+        // When
+        int actual = arraz.findIndexOf(x, 7);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+
+
+    }
+
+    @Test
+    public void test2findIndexOf() {
+        // Given
+        String[] y = {"Curtis", "Caleb", "Liam"};
+        int expected = -1;
+
+        // When
+        int actual = arraz.findIndexOf(y, "Ashley");
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test1copyArrayByInterator() {
+        // Given
+        Double[] expected = {1234.56, 45.67, 8.9};
+
+        // When
+        Object[] actual = arraz.copyArrayByInterator(expected);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2copyArrayByInterator() {
+        // Given
+        String[] expected = {"Curtis", "Caleb", "Liam"};
+
+        // When
+        Object[] actual = arraz.copyArrayByInterator(expected);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1copyArrayByLoop() {
+        // Given
+        Double[] expected = {1234.56, 45.67, 8.9};
+
+        // When
+        Object[] actual = arraz.copyArrayByLoop(expected);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2copyArrayByLoop() {
+        // Given
+        String[] expected = {"Curtis", "Caleb", "Liam"};
+
+        // When
+        Object[] actual = arraz.copyArrayByLoop(expected);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1removeElementFromArray() {
+        // Given
+        String[] x = {"Brian", "Damon", "Greg", "Ed"};
+        String[] expected = {"Brian", "Damon", "Ed"};
+
+        // When
+        Object[] actual = arraz.removeElementFromArray(x, "Greg");
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2removeElementFromArray() {
+        // Given
+        Character[] x = {'b', 'd', 'e', 'g'};
+        Character[] expected = {'b', 'd', 'e'};
+
+        // When
+        Object[] actual = arraz.removeElementFromArray(x, 'g');
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+
+    @Test
+    public void test1insertIntoArrayAt() {
+        // Given
+        Character[] x = {'b', 'd', 'e'};
+        Character[] expected = {'b', 'd', 'e', 'g'};
+
+        // When
+        Object[] actual = arraz.insertIntoArrayAt(x, 3, 'g');
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2insertIntoArrayAt() {
+        // Given
+        Integer[] y = {1, 2, 4, 5, 6};
+        Integer[] expected = {1, 2, 3, 4, 5, 6};
+
+        // When
+        Object[] actual = arraz.insertIntoArrayAt(y, 2, 3);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1removeDupesFromArray() {
+        // Given
+        Integer[] x = {11, 22, 33, 44, 11, 44};
+        Integer[] expected = {11, 22, 33, 44};
+
+        // When
+        Integer[] actual = arraz.removeDupesFromArray(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2removeDupesFromArray() {
+        // Given
+        Integer[] y = {5, 6, 7, 8, 7, 6, 5};
+        Integer[] expected = {5, 6, 7, 8};
+
+        // When
+        Integer[] actual = arraz.removeDupesFromArray(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+
+    }
+
+    @Test
+    public void test1find2ndLargestValueFromArray() {
+        // Given
+        double[] x = {11.22, 33.44, 55.66};
+        double expected = 33.44;
+
+        // When
+        double actual = arraz.find2ndLargestValueFromArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test2find2ndLargestValueFromArray() {
+        // Given
+        double[] y = {0.03, 0.3, 0.1, 0.98};
+        double expected = 0.3;
+
+        // When
+        double actual = arraz.find2ndLargestValueFromArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual, 0.01);
+    }
+
+    @Test
+    public void test1makeMeAnArrayFromArrayList() {
+        // Given
+        ArrayList<String> x = new ArrayList<String>();
+        x.add("Curtis");
+        x.add("Caleb");
+        x.add("Liam");
+        String[] expected = {"Curtis", "Caleb", "Liam"};
+
+        // When
+        Object[] actual = arraz.makeMeAnArrayFromArrayList(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2makeMeAnArrayFromArrayList() {
+        // Given
+        ArrayList<Character> y = new ArrayList<Character>();
+        y.add('A');
+        y.add('b');
+        y.add('C');
+        y.add('d');
+        Character[] expected = {'A', 'b', 'C', 'd'};
+
+        // When
+        Object[] actual = arraz.makeMeAnArrayFromArrayList(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1makeMeAnArrayListFromArray() {
+        // Given
+        Double[] x = {11.11, 22.22, 33.33};
+        ArrayList<Double> expected = new ArrayList<Double>();
+        expected.add(11.11);
+        expected.add(22.22);
+        expected.add(33.33);
+
+        // When
+        ArrayList<Double> actual = arraz.makeMeAnArrayListFromArray(x);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2makeMeAnArrayListFromArray() {
+        // Given
+        Integer[] y = {234, 987, 100, 77};
+        ArrayList<Integer> expected = new ArrayList<Integer>();
+        expected.add(234);
+        expected.add(987);
+        expected.add(100);
+        expected.add(77);
+
+        // When
+        ArrayList<Integer> actual = arraz.makeMeAnArrayListFromArray(y);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test1check2ArraysForEqual() {
+        // Given
+        Integer[] x = {1, 2, 3, 4, 5};
+        Integer[] y = {5, 4, 3, 2, 1};
+
+        // Then
+        Assert.assertFalse(arraz.check2ArraysForEqual(x, y));
+    }
+
+    @Test
+    public void test2check2ArraysForEqual() {
+        // Given
+        String[] x = {"Curtis", "Caleb", "Lionel"};
+        String[] y = {"Curtis", "Caleb", "Lionel"};
+
+        // Then
+        Assert.assertTrue(arraz.check2ArraysForEqual(x, y));
+    }
+
+    @Test
+    public void test1averageArrayWithoutMaxMin() {
+        // Given
+        int[] x = {1, 2, 3, 4, 5};
+        int expected = (2 + 3 + 4) / (x.length - 2);
+
+        // When
+        int actual = arraz.averageArrayWithoutMaxMin(x);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2averageArrayWithoutMaxMin() {
+        // Given
+        int[] y = {99, 88, 77, 66, 55};
+        int expected =(88 + 77 + 66) / (y.length - 2);
+
+        // When
+        int actual = arraz.averageArrayWithoutMaxMin(y);
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test1arrayHas65and77() {
+        // Given
+        int[] x = {98, 76, 54, 32};
+
+        // When
+        boolean actual = arraz.arrayHas65and77(x);
+
+        // Then
+        Assert.assertFalse(actual);
+    }
+
+    @Test
+    public void test2arrayHas65and77() {
+        // Given
+        int[] y = {65, 77};
+
+        // When
+        boolean actual = arraz.arrayHas65and77(y);
+
+        // Then
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test1theTotalofTensIs30() {
+        // Given
+        int[] x = {10, 20, 10, 30, 10};
+
+        // When
+        boolean actual = arraz.theTotalofTensIs30(x);
+
+        // Then
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void test2theTotalofTensIs30() {
+        // Given
+        int[] y = {10, 20, 30, 40, 50};
+
+        // When
+        boolean actual = arraz.theTotalofTensIs30(y);
+
+        // Then
+        Assert.assertFalse(actual);
+    }
+
+    @Test
+    public void test1makeMeACopyPlease() {
+        // Given
+        int[] x = {1, 3, 5, 7};
+        int[] expected = {7, 5, 3, 1};
+
+        // When
+        int[] actual = arraz.makeMeACopyPlease(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2makeMeACopyPlease() {
+        // Given
+        int[] y = {7, 5, 3, 1};
+        int[] expected = {1, 3, 5, 7};
+
+        // When
+        int[] actual = arraz.makeMeACopyPlease(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1removeLastItemAndCopy() {
+        // Given
+        Double[] x = {0.01, 0.1, 1.0};
+        Double[] expected = {0.01, 0.1};
+
+        // When
+        Object[] actual = arraz.removeLastItemAndCopy(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2removeLastItemAndCopy() {
+        // Given
+        String[] y = {"Curtis", "Caleb", "Liam", "Ashley"};
+        String[] expected = {"Curtis", "Caleb", "Liam"};
+
+        // When
+        Object[] actual = arraz.removeLastItemAndCopy(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1removeFirstItemAndCopy() {
+        // Given
+        Double[] x = {0.01, 0.1, 1.0};
+        Double[] expected = {0.1, 1.0};
+
+        // When
+        Object[] actual = arraz.removeFirstItemAndCopy(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2removeFirstItemAndCopy() {
+        // Given
+        String[] y = {"Curtis", "Caleb", "Liam", "Ashley"};
+        String[] expected = {"Caleb", "Liam", "Ashley"};
+
+        // When
+        Object[] actual = arraz.removeFirstItemAndCopy(y);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1insertAtStartAndCopy() {
+        // Given
+        Integer[] x = {1, 2, 3, 4, 5};
+        Integer[] expected = {0, 1, 2, 3, 4, 5};
+
+        // When
+        Object[] actual = arraz.insertAtStartAndCopy(x, 0);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2insertAtStartAndCopy() {
+        // Given
+        String[] y = {"Caleb", "Liam"};
+        String[] expected = {"Curtis", "Caleb", "Liam"};
+
+        // When
+        Object[] actual = arraz.insertAtStartAndCopy(y, "Curtis");
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1insertAtEndAndCopy() {
+        // Given
+        Double[] x = {11.11, 22.22, 33.33};
+        Double[] expected = {11.11, 22.22, 33.33, 44.44};
+
+        // When
+        Object[] actual = arraz.insertAtEndAndCopy(x, 44.44);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2insertAtEndAndCopy() {
+        // Given
+        String[] y = {"Curtis", "Caleb", "Liam"};
+        String[] expected = {"Curtis", "Caleb", "Liam", "Ashley"};
+
+        // When
+        Object[] actual = arraz.insertAtEndAndCopy(y, "Ashley");
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test1sortArrayIntoEvensThenOdds() {
+        // Given
+        Integer[] x = {1, 2, 3, 4, 5, 6, 7, 8};
+        Integer[] expected = {2, 4, 6, 8, 1, 3, 5, 7};
+
+        // When
+        Object[] actual = arraz.sortArrayIntoEvensThenOdds(x);
+
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+    @Test
+    public void test2sortArrayIntoEvensThenOdds() {
+        // Given
+        Integer[] y = {11, 22, 33, 44};
+        Integer[]  expected = {22, 44, 11, 33};
+
+        // When
+        Object[] actual = arraz.sortArrayIntoEvensThenOdds(y);
 
+        // Then
+        Assert.assertArrayEquals(expected, actual);
+    }
 }

arraz/src/test/java/MaxMinTest.java

@@ -0,0 +1,34 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class MaxMinTest {
+    MaxMin maxMin = new MaxMin(0, 0);
+
+    @Test
+    public void test1findMaxMinOfArray() {
+        // Given
+        int[] x = {1, 3, 5, 7, 9};
+        int expected = 1;
+
+        // When
+        maxMin.findMaxMinOfArray(x);
+        int actual = maxMin.getMin();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2findMaxMinOfArray() {
+        // Given
+        int[] y = {2, 4, 6, 8, 10};
+        int expected = 10;
+
+        // When
+        maxMin.findMaxMinOfArray(y);
+        int actual = maxMin.getMax();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+}

arraz/src/test/java/OddEvenTest.java

@@ -0,0 +1,35 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class OddEvenTest {
+
+    @Test
+    public void test1getOddEvensOfArray() {
+        // Given
+        int[] x = {1, 2, 3, 4, 5, 6, 7};
+        int expected = 3;
+        OddEven oddEven = new OddEven(0, 0);
+
+        // When
+        oddEven.getOddEvensOfArray(x);
+        int actual = oddEven.getEvens();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2getOddEvensOfArray() {
+        // Given
+        int[] y = {11, 7, 8, 13, 6, 19, 4, 4};
+        int expected = 4;
+        OddEven oddEven = new OddEven(0, 0);
+
+        // When
+        oddEven.getOddEvensOfArray(y);
+        int actual = oddEven.getOdds();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+}

arraz/src/test/java/SmallestFirstAndSecondTest.java

@@ -0,0 +1,34 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class SmallestFirstAndSecondTest {
+    SmallestFirstAndSecond smallestFirstAndSecond = new SmallestFirstAndSecond(0, 0);
+
+    @Test
+    public void test1findSmallestAndSecondSmallest() {
+        // Given
+        int[] x = {1, 234, 5, 678, 9};
+        int expected = 1;
+
+        // When
+        smallestFirstAndSecond.findSmallestAndSecondSmallest(x);
+        int actual = smallestFirstAndSecond.getSmallest();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void test2findSmallestAndSecondSmallest() {
+        // Given
+        int[] y = {1, 234, 5, 678, 9};
+        int expected = 5;
+
+        // When
+        smallestFirstAndSecond.findSmallestAndSecondSmallest(y);
+        int actual = smallestFirstAndSecond.getSecondSmallest();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+}