Minor fixes for Trait subject

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/AnimalTrait.groovy

@@ -1,8 +1,8 @@
 package com.baeldung.traits
 
 trait AnimalTrait {
-    
+
     String basicBehavior() {
         return "Animalistic!!"
     }
-}
+}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/Dog.groovy

@@ -1,9 +1,8 @@
 package com.baeldung.traits
 
 class Dog implements WalkingTrait, SpeakingTrait {
-     
+    
     String speakAndWalk() {
         WalkingTrait.super.speakAndWalk()
     }
-    
+}
-}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/Employee.groovy

@@ -1,12 +1,14 @@
 package com.baeldung.traits
 
 class Employee implements UserTrait {
-    
+
+    @Override
     String name() {
         return 'Bob'
     }
     
+    @Override
     String lastName() {
         return "Marley"
     }
-}
+}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/Human.groovy

@@ -1,6 +1,6 @@
 package com.baeldung.traits
 
 interface Human {
-    
+
     String lastName()
-}
+}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/SpeakingTrait.groovy

@@ -1,13 +1,12 @@
 package com.baeldung.traits
 
 trait SpeakingTrait {
-    
+
     String basicAbility() {
         return "Speaking!!"
     }
-    
+
     String speakAndWalk() {
         return "Speak and walk!!"
     }
-    
+}
-}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/UserTrait.groovy

@@ -1,36 +1,35 @@
 package com.baeldung.traits
 
 trait UserTrait implements Human {
-    
+
+    String email
+    String address
+
+    abstract String name()
+
     String sayHello() {
         return "Hello!"
     }
-    
+
-    abstract String name()
-    
     String showName() {
-       return "Hello, ${name()}!"
+        return "Hello, ${name()}!"
     }
 
     private String greetingMessage() {
         return 'Hello, from a private method!'
     }
-    
+
     String greet() {
         def msg = greetingMessage()
         println msg
         msg
     }
-    
+
     def self() {
-        return this 
+        return this
     }
-    
+
     String showLastName() {
         return "Hello, ${lastName()}!"
     }
-    
-    String email
-    String address
 }
-    

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/VehicleTrait.groovy

@@ -1,9 +1,9 @@
 package com.baeldung
 
 trait VehicleTrait extends WheelTrait {
-    
+
     String showWheels() {
-        return "Num of Wheels $noOfWheels" 
+        return "Num of Wheels $noOfWheels"
     }
-    
+
-}
+}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/WalkingTrait.groovy

@@ -1,13 +1,13 @@
 package com.baeldung.traits
 
 trait WalkingTrait {
-    
+
     String basicAbility() {
         return "Walking!!"
     }
-    
+
     String speakAndWalk() {
         return "Walk and speak!!"
     }
-    
+
-}
+}

core-groovy-modules/core-groovy/src/main/groovy/com/baeldung/traits/WheelTrait.groovy

@@ -1,7 +1,6 @@
 package com.baeldung
 
 trait WheelTrait {
-    
+
     int noOfWheels
-    
+}
-}

core-groovy-modules/core-groovy/src/test/groovy/com/baeldung/traits/TraitsUnitTest.groovy

@@ -7,108 +7,111 @@ class TraitsUnitTest extends Specification {
     Employee employee
     Dog dog
 
-    void setup () {
+    void setup() {
         employee = new Employee()
         dog = new Dog()
     }
 
-    def 'Should return msg string when using Employee.sayHello method provided by UserTrait' () {
+    def 'Should return msg string when using Employee.sayHello method provided by UserTrait'() {
         when:
-            def msg = employee.sayHello()
+        def msg = employee.sayHello()
+
         then:
-            msg
+        msg
-            msg instanceof String
+        msg instanceof String
-            assert msg == "Hello!"
+        msg == "Hello!"
     }
-    
+
-    def 'Should return displayMsg string when using Employee.showName method' () {
+    def 'Should return displayMsg string when using Employee.showName method'() {
         when:
-            def displayMsg = employee.showName()
+        def displayMsg = employee.showName()
+
         then:
-            displayMsg
+        displayMsg
-            displayMsg instanceof String
+        displayMsg instanceof String
-            assert displayMsg == "Hello, Bob!"
+        displayMsg == "Hello, Bob!"
     }
-    
+
-    def 'Should return greetMsg string when using Employee.greet method' () {
+    def 'Should return greetMsg string when using Employee.greet method'() {
         when:
-            def greetMsg = employee.greet()
+        def greetMsg = employee.greet()
+
         then:
-            greetMsg
+        greetMsg
-            greetMsg instanceof String
+        greetMsg instanceof String
-            assert greetMsg == "Hello, from a private method!"
+        greetMsg == "Hello, from a private method!"
     }
-    
+
-    def 'Should return MissingMethodException when using Employee.greetingMessage method' () {
+    def 'Should return MissingMethodException when using Employee.greetingMessage method'() {
         when:
-            def exception
+        employee.greetingMessage()
-            try {
+
-                employee.greetingMessage()
-            }catch(Exception e) {
-                exception = e
-            }
-            
         then:
-            exception
+        thrown(MissingMethodException)
-            exception instanceof groovy.lang.MissingMethodException
+        specificationContext.thrownException.message ==
-            assert exception.message == "No signature of method: com.baeldung.traits.Employee.greetingMessage()"+
+                "No signature of method: com.baeldung.traits.Employee.greetingMessage() is applicable for argument types: () values: []"
-            " is applicable for argument types: () values: []"
     }
-    
+
-    def 'Should return employee instance when using Employee.whoAmI method' () {
+    def 'Should return employee instance when using Employee.whoAmI method'() {
         when:
-            def emp = employee.self()
+        def emp = employee.self()
+
         then:
-            emp
+        emp
-            emp instanceof Employee
+        emp instanceof Employee
-            assert emp.is(employee)
+        emp.is(employee)
     }
-    
+
-    def 'Should display lastName when using Employee.showLastName method' () {
+    def 'Should display lastName when using Employee.showLastName method'() {
         when:
-            def lastNameMsg = employee.showLastName()
+        def lastNameMsg = employee.showLastName()
+
         then:
-            lastNameMsg
+        lastNameMsg
-            lastNameMsg instanceof String
+        lastNameMsg instanceof String
-            assert lastNameMsg == "Hello, Marley!"
+        lastNameMsg == "Hello, Marley!"
     }
-    
+
-    def 'Should be able to define properties of UserTrait in Employee instance' () {
+    def 'Should be able to define properties of UserTrait in Employee instance'() {
         when:
-            employee = new Employee(email: "a@e.com", address: "baeldung.com")
+        employee = new Employee(email: "a@e.com", address: "baeldung.com")
+
         then:
-            employee
+        employee
-            employee instanceof Employee
+        employee instanceof Employee
-            assert employee.email == "a@e.com"
+        employee.email == "a@e.com"
-            assert employee.address == "baeldung.com"
+        employee.address == "baeldung.com"
     }
-    
+
-    def 'Should execute basicAbility method from SpeakingTrait and return msg string' () {
+    def 'Should execute basicAbility method from SpeakingTrait and return msg string'() {
         when:
-            def speakMsg = dog.basicAbility()
+        def speakMsg = dog.basicAbility()
+
         then:
-            speakMsg
+        speakMsg
-            speakMsg instanceof String
+        speakMsg instanceof String
-            assert speakMsg == "Speaking!!"
+        speakMsg == "Speaking!!"
     }
-    
+
-    def 'Should verify multiple inheritance with traits and execute overridden traits method' () {
+    def 'Should verify multiple inheritance with traits and execute overridden traits method'() {
         when:
-            def walkSpeakMsg = dog.speakAndWalk()
+        def walkSpeakMsg = dog.speakAndWalk()
-            println walkSpeakMsg
+        println walkSpeakMsg
+
         then:
-            walkSpeakMsg
+        walkSpeakMsg
-            walkSpeakMsg instanceof String
+        walkSpeakMsg instanceof String
-            assert walkSpeakMsg == "Walk and speak!!"
+        walkSpeakMsg == "Walk and speak!!"
     }
-    
+
-    def 'Should implement AnimalTrait at runtime and access basicBehavior method' () {
+    def 'Should implement AnimalTrait at runtime and access basicBehavior method'() {
         when:
-            def dogInstance = new Dog() as AnimalTrait
+        def dogInstance = new Dog() as AnimalTrait
-            def basicBehaviorMsg = dogInstance.basicBehavior()
+        def basicBehaviorMsg = dogInstance.basicBehavior()
+
         then:
-            basicBehaviorMsg
+        basicBehaviorMsg
-            basicBehaviorMsg instanceof String
+        basicBehaviorMsg instanceof String
-            assert basicBehaviorMsg == "Animalistic!!"
+        basicBehaviorMsg == "Animalistic!!"
     }
-}
+}