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.idea/.name

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+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
+      <provider selected="true" editor-type-id="text-editor">
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+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java">
+      <provider selected="true" editor-type-id="text-editor">
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+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
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+          <caret line="4" selection-start-line="4" selection-end-line="4" />
+        </state>
+      </provider>
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+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.java">
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+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>

interfaces-1.iml

@@ -0,0 +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">
+    <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/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

src/main/java/io/zipcoder/interfaces/Instructor.java

@@ -0,0 +1,11 @@
+package io.zipcoder.interfaces;
+
+public class Instructor implements Teacher {
+    public void teach(Learner learner, double numberOfHours) {
+
+    }
+
+    public void lecture(Learner[] learners, double numberOfHours) {
+
+    }
+}

src/main/java/io/zipcoder/interfaces/Learner.java

@@ -0,0 +1,7 @@
+package io.zipcoder.interfaces;
+
+public interface Learner {
+
+    void learn(double numberOfHours);
+
+}

src/main/java/io/zipcoder/interfaces/Person.java

@@ -2,4 +2,19 @@ package io.zipcoder.interfaces;
 
 public class Person {
 
+
+    private final long id = 5;
+    private String name;
+
+    public long getId() {
+        return this.id;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
 }

src/main/java/io/zipcoder/interfaces/Student.java

@@ -0,0 +1,15 @@
+package io.zipcoder.interfaces;
+
+public class Student extends Person implements Learner {
+
+    public double totalStudyTime = 5;
+
+    public void learn(double numberOfHours) {
+        totalStudyTime += numberOfHours;
+
+    }
+
+    public double getTotalStudyTime() {
+        return totalStudyTime;
+    }
+}

src/main/java/io/zipcoder/interfaces/Teacher.java

@@ -0,0 +1,10 @@
+package io.zipcoder.interfaces;
+
+public interface Teacher {
+
+    public void teach(Learner learner, double numberOfHours);
+
+    public void lecture(Learner[] learners, double numberOfHours);
+
+
+}

src/test/java/io/zipcoder/interfaces/InstructorTest.java

@@ -0,0 +1,19 @@
+package io.zipcoder.interfaces;
+
+
+import org.junit.Test;
+import org.junit.Assert;
+import sun.jvm.hotspot.oops.Instance;
+
+public class InstructorTest implements Teacher {
+
+    public void testImplementation(){
+        Teacher teacher = new Instructor();
+
+        
+
+        Assert.assertEquals(true, Instructor instanceof teacher);
+    }
+
+
+}

src/test/java/io/zipcoder/interfaces/StudentTest.java

@@ -0,0 +1,48 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Test;
+import org.junit.Assert;
+import sun.jvm.hotspot.oops.Instance;
+
+public class StudentTest {
+    Student student = new Student();
+
+
+
+    @Test
+    public void testImplementation(){
+
+        student.learn(80);
+
+        Assert.assertEquals(true, student instanceof Learner);
+    }
+
+    @Test
+    public void testInheritance() {
+
+        Person person = new Student();
+
+        long expected = 5;
+        long actual = student.getId();
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testLearn(){
+        double total = 5;
+        student.learn(80);
+
+        double expected = 85;
+        double actual = student.totalStudyTime;
+
+        Assert.assertEquals(expected, actual, .001);
+
+    }
+
+
+
+
+
+
+}

src/test/java/io/zipcoder/interfaces/TestPerson.java

@@ -1,5 +1,30 @@
 package io.zipcoder.interfaces;
 
+import org.junit.Test;
+import org.junit.Assert;
+
 public class TestPerson {
 
+    Person person = new Person();
+
+    @Test
+    public void testConstructor(){
+
+        long actual = person.getId();
+
+        Assert.assertNotNull(actual);
+
+
+    }
+
+    @Test
+    public void testSetAndGetName(){
+
+        person.setName("John");
+        String expected = "John";
+        String actual = person.getName();
+
+        Assert.assertEquals(expected, actual);
+    }
+
 }