Edited code and passed all tests

AliceAndBobEngine.java

@@ -10,16 +10,17 @@ public class AliceAndBobEngine {
      * @return `true` if `input` is "Alice"
      */
     public Boolean isAlice(String input) {
-        return null;
+        return input.equals("Alice");
     }
+
 
     /**
      * return `true` if the input value is "Bob"
      * @param input - this value is variable: it has the potential to be many things
      * @return `true` if `input` is "Bob"
      */
     public Boolean isBob(String input) {
-        return null;
+        return input.equals("Bob");
     }
 
     /**
@@ -28,7 +29,11 @@ public Boolean isBob(String input) {
      * @return `true` if `input` is "Alice" or "Bob"
      */
     public Boolean isAliceOrBob(String input) {
-        return null;
+        if (input == "Alice" || input == "Bob"){
+            return true;
+        } else {
+            return false;
+        }
     }
 
     /**
@@ -42,6 +47,10 @@ public Boolean isAliceOrBob(String input) {
      * @return respective String value
      */
     public String getGreeting(String input) {
-        return null;
+        if (input == "Alice" || input == "Bob"){
+            return "Hello, " + input + "!";
+        } else {
+            return "Begone, " + input + "! You're a stranger!";
+        }
     }
 }

IsAliceTest.java

@@ -15,7 +15,6 @@ private void testIsAlice(String input, Boolean expected){
         // when
         Boolean actual = evaluator.isAlice(input);
 
-
         // then
         Assert.assertEquals(expected, actual);
     }

IsBobTest.java

@@ -15,7 +15,6 @@ private void testIsBob(String input, Boolean expected) {
         // when
         Boolean actual = evaluator.isBob(input);
 
-
         // then
         Assert.assertEquals(expected, actual);
     }

package.bluej

@@ -1,32 +1,78 @@
 #BlueJ package file
-editor.fx.0.height=0
-editor.fx.0.width=0
-editor.fx.0.x=0
-editor.fx.0.y=0
-objectbench.height=101
-objectbench.width=776
-package.divider.horizontal=0.6
-package.divider.vertical=0.8007380073800738
-package.editor.height=427
-package.editor.width=674
+dependency1.from=IsAliceOrBobTest
+dependency1.to=AliceAndBobEngine
+dependency1.type=UsesDependency
+dependency2.from=GetGreetingTest
+dependency2.to=AliceAndBobEngine
+dependency2.type=UsesDependency
+dependency3.from=IsAliceTest
+dependency3.to=AliceAndBobEngine
+dependency3.type=UsesDependency
+dependency4.from=IsBobTest
+dependency4.to=AliceAndBobEngine
+dependency4.type=UsesDependency
+editor.fx.0.height=706
+editor.fx.0.width=800
+editor.fx.0.x=385
+editor.fx.0.y=25
+objectbench.height=164
+objectbench.width=431
+package.divider.horizontal=0.5615384615384615
+package.divider.vertical=0.6809701492537313
+package.editor.height=358
+package.editor.width=667
 package.editor.x=181
 package.editor.y=109
 package.frame.height=600
 package.frame.width=800
-package.numDependencies=0
-package.numTargets=1
+package.numDependencies=4
+package.numTargets=6
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
-readme.height=58
+readme.height=60
 readme.name=@README
-readme.width=47
+readme.width=48
 readme.x=10
 readme.y=10
-target1.height=50
-target1.name=Main
+target1.height=70
+target1.name=IsAliceTest
 target1.showInterface=false
 target1.type=ClassTarget
-target1.width=80
-target1.x=70
-target1.y=10
+target1.width=120
+target1.x=10
+target1.y=130
+target2.height=70
+target2.name=IsBobTest
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=140
+target2.y=120
+target3.height=70
+target3.name=IsAliceOrBobTest
+target3.showInterface=false
+target3.type=ClassTarget
+target3.width=120
+target3.x=140
+target3.y=260
+target4.height=70
+target4.name=AliceAndBobEngine
+target4.showInterface=false
+target4.type=ClassTarget
+target4.width=140
+target4.x=300
+target4.y=190
+target5.height=70
+target5.name=README.md
+target5.type=TextTarget
+target5.width=120
+target5.x=140
+target5.y=10
+target6.height=70
+target6.name=GetGreetingTest
+target6.showInterface=false
+target6.type=ClassTarget
+target6.width=120
+target6.x=10
+target6.y=250