From c574b94ea34092088373bd96d1ce42a8582b751a Mon Sep 17 00:00:00 2001
From: amedviediev <amedvyedyev@gmail.com>
Date: Fri, 15 Apr 2016 23:47:32 +0300
Subject: [PATCH 1/5] - Added code for JUnit 5 article

---
 junit5/pom.xml                                | 83 +++++++++++++++++++
 .../java/com/baeldung/AssumptionTest.java     | 31 +++++++
 .../test/java/com/baeldung/ExceptionTest.java | 15 ++++
 .../src/test/java/com/baeldung/FirstTest.java | 27 ++++++
 .../test/java/com/baeldung/NestedTest.java    | 77 +++++++++++++++++
 5 files changed, 233 insertions(+)
 create mode 100644 junit5/pom.xml
 create mode 100644 junit5/src/test/java/com/baeldung/AssumptionTest.java
 create mode 100644 junit5/src/test/java/com/baeldung/ExceptionTest.java
 create mode 100644 junit5/src/test/java/com/baeldung/FirstTest.java
 create mode 100644 junit5/src/test/java/com/baeldung/NestedTest.java

diff --git a/junit5/pom.xml b/junit5/pom.xml
new file mode 100644
index 0000000000..5a2ea61668
--- /dev/null
+++ b/junit5/pom.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>junit5</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <name>junit5</name>
+    <description>Intro to JUnit 5</description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+        <!-- Due to a bug in surefire-junit5-5.0.0-ALPHA we use the latest snapshot instead -->
+        <junit.gen5.version>5.0.0-SNAPSHOT</junit.gen5.version>
+    </properties>
+
+    <repositories>
+        <repository>
+            <id>snapshots-repo</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <!-- Do NOT cache JUnit 5 snapshot JARs. -->
+                <updatePolicy>always</updatePolicy>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
+    <pluginRepositories>
+        <pluginRepository>
+            <id>snapshots-repo</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <!-- Do NOT cache JUnit 5 snapshot JARs. -->
+                <updatePolicy>always</updatePolicy>
+                <enabled>true</enabled>
+            </snapshots>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.19</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.junit</groupId>
+                        <artifactId>surefire-junit5</artifactId>
+                        <version>${junit.gen5.version}</version>
+                    </dependency>
+                </dependencies>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit</groupId>
+            <artifactId>junit5-api</artifactId>
+            <version>${junit.gen5.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file
diff --git a/junit5/src/test/java/com/baeldung/AssumptionTest.java b/junit5/src/test/java/com/baeldung/AssumptionTest.java
new file mode 100644
index 0000000000..6e6e56fe0a
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/AssumptionTest.java
@@ -0,0 +1,31 @@
+package com.baeldung;
+
+import org.junit.gen5.api.Test;
+
+import static org.junit.gen5.api.Assumptions.assumeFalse;
+import static org.junit.gen5.api.Assumptions.assumeTrue;
+import static org.junit.gen5.api.Assumptions.assumingThat;
+
+public class AssumptionTest {
+
+    @Test
+    void trueAssumption() {
+        assumeTrue(5 > 1);
+        System.out.println("Was true");
+    }
+
+    @Test
+    void falseAssumption() {
+        assumeFalse(5 < 1);
+        System.out.println("Was false");
+    }
+
+    @Test
+    void assumptionThat() {
+        String someString = "Just a string";
+        assumingThat(
+                someString.equals("Just a string"),
+                () -> System.out.println("Assumption was correct")
+        );
+    }
+}
diff --git a/junit5/src/test/java/com/baeldung/ExceptionTest.java b/junit5/src/test/java/com/baeldung/ExceptionTest.java
new file mode 100644
index 0000000000..a9a5b8301d
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/ExceptionTest.java
@@ -0,0 +1,15 @@
+package com.baeldung;
+
+import org.junit.gen5.api.Test;
+
+import static org.junit.gen5.api.Assertions.assertEquals;
+import static org.junit.gen5.api.Assertions.expectThrows;
+
+public class ExceptionTest {
+
+    @Test
+    void shouldThrowException() {
+        Throwable exception = expectThrows(NullPointerException.class, null);
+        assertEquals(exception.getClass(), NullPointerException.class);
+    }
+}
diff --git a/junit5/src/test/java/com/baeldung/FirstTest.java b/junit5/src/test/java/com/baeldung/FirstTest.java
new file mode 100644
index 0000000000..c0dc6f345c
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/FirstTest.java
@@ -0,0 +1,27 @@
+package com.baeldung;
+
+import org.junit.gen5.api.Test;
+
+import static org.junit.gen5.api.Assertions.assertAll;
+import static org.junit.gen5.api.Assertions.assertEquals;
+import static org.junit.gen5.api.Assertions.assertTrue;
+
+class FirstTest {
+
+    @Test
+    void lambdaExpressions() {
+        String string = "";
+        assertTrue(() -> string.isEmpty(), "String should be empty");
+    }
+
+    @Test
+    void groupAssertions() {
+        int[] numbers = {0,1,2,3,4};
+        assertAll("numbers", () -> {
+            assertEquals(numbers[0], 1);
+            assertEquals(numbers[3], 3);
+            assertEquals(numbers[4], 1);
+        });
+    }
+
+}
diff --git a/junit5/src/test/java/com/baeldung/NestedTest.java b/junit5/src/test/java/com/baeldung/NestedTest.java
new file mode 100644
index 0000000000..3fbe4f8644
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/NestedTest.java
@@ -0,0 +1,77 @@
+package com.baeldung;
+
+import org.junit.gen5.api.*;
+
+import java.util.EmptyStackException;
+import java.util.Stack;
+
+public class NestedTest {
+    Stack<Object> stack;
+    boolean isRun = false;
+
+    @Test
+    @DisplayName("is instantiated with new Stack()")
+    void isInstantiatedWithNew() {
+        new Stack<Object>();
+    }
+
+    @Nested
+    @DisplayName("when new")
+    class WhenNew {
+
+        @BeforeEach
+        void init() {
+            stack = new Stack<Object>();
+        }
+
+        @Test
+        @DisplayName("is empty")
+        void isEmpty() {
+            Assertions.assertTrue(stack.isEmpty());
+        }
+
+        @Test
+        @DisplayName("throws EmptyStackException when popped")
+        void throwsExceptionWhenPopped() {
+            Assertions.expectThrows(EmptyStackException.class, () -> stack.pop());
+        }
+
+        @Test
+        @DisplayName("throws EmptyStackException when peeked")
+        void throwsExceptionWhenPeeked() {
+            Assertions.expectThrows(EmptyStackException.class, () -> stack.peek());
+        }
+
+        @Nested
+        @DisplayName("after pushing an element")
+        class AfterPushing {
+
+            String anElement = "an element";
+
+            @BeforeEach
+            void init() {
+                stack.push(anElement);
+            }
+
+            @Test
+            @DisplayName("it is no longer empty")
+            void isEmpty() {
+                Assertions.assertFalse(stack.isEmpty());
+            }
+
+            @Test
+            @DisplayName("returns the element when popped and is empty")
+            void returnElementWhenPopped() {
+                Assertions.assertEquals(anElement, stack.pop());
+                Assertions.assertTrue(stack.isEmpty());
+            }
+
+            @Test
+            @DisplayName("returns the element when peeked but remains not empty")
+            void returnElementWhenPeeked() {
+                Assertions.assertEquals(anElement, stack.peek());
+                Assertions.assertFalse(stack.isEmpty());
+            }
+        }
+    }
+}

From a875e25b18f85c80571c27e145fd2816400f04cc Mon Sep 17 00:00:00 2001
From: amedviediev <amedvyedyev@gmail.com>
Date: Mon, 2 May 2016 13:00:21 +0300
Subject: [PATCH 2/5] - Added code for JUnit 5 article

---
 .../test/java/com/baeldung/AssumptionTest.java   |  7 ++++---
 .../test/java/com/baeldung/ExceptionTest.java    |  5 ++++-
 junit5/src/test/java/com/baeldung/FirstTest.java |  8 +++++++-
 .../src/test/java/com/baeldung/TaggedTest.java   | 16 ++++++++++++++++
 4 files changed, 31 insertions(+), 5 deletions(-)
 create mode 100644 junit5/src/test/java/com/baeldung/TaggedTest.java

diff --git a/junit5/src/test/java/com/baeldung/AssumptionTest.java b/junit5/src/test/java/com/baeldung/AssumptionTest.java
index 6e6e56fe0a..634ec9b21e 100644
--- a/junit5/src/test/java/com/baeldung/AssumptionTest.java
+++ b/junit5/src/test/java/com/baeldung/AssumptionTest.java
@@ -2,6 +2,7 @@ package com.baeldung;
 
 import org.junit.gen5.api.Test;
 
+import static org.junit.gen5.api.Assertions.assertEquals;
 import static org.junit.gen5.api.Assumptions.assumeFalse;
 import static org.junit.gen5.api.Assumptions.assumeTrue;
 import static org.junit.gen5.api.Assumptions.assumingThat;
@@ -11,13 +12,13 @@ public class AssumptionTest {
     @Test
     void trueAssumption() {
         assumeTrue(5 > 1);
-        System.out.println("Was true");
+        assertEquals(5 + 2, 7);
     }
 
     @Test
     void falseAssumption() {
         assumeFalse(5 < 1);
-        System.out.println("Was false");
+        assertEquals(5 + 2, 7);
     }
 
     @Test
@@ -25,7 +26,7 @@ public class AssumptionTest {
         String someString = "Just a string";
         assumingThat(
                 someString.equals("Just a string"),
-                () -> System.out.println("Assumption was correct")
+                () -> assertEquals(2 + 2, 4)
         );
     }
 }
diff --git a/junit5/src/test/java/com/baeldung/ExceptionTest.java b/junit5/src/test/java/com/baeldung/ExceptionTest.java
index a9a5b8301d..26c44e8b10 100644
--- a/junit5/src/test/java/com/baeldung/ExceptionTest.java
+++ b/junit5/src/test/java/com/baeldung/ExceptionTest.java
@@ -2,6 +2,8 @@ package com.baeldung;
 
 import org.junit.gen5.api.Test;
 
+import java.util.ArrayList;
+
 import static org.junit.gen5.api.Assertions.assertEquals;
 import static org.junit.gen5.api.Assertions.expectThrows;
 
@@ -9,7 +11,8 @@ public class ExceptionTest {
 
     @Test
     void shouldThrowException() {
-        Throwable exception = expectThrows(NullPointerException.class, null);
+        ArrayList list = null;
+        Throwable exception = expectThrows(NullPointerException.class, list::clear);
         assertEquals(exception.getClass(), NullPointerException.class);
     }
 }
diff --git a/junit5/src/test/java/com/baeldung/FirstTest.java b/junit5/src/test/java/com/baeldung/FirstTest.java
index c0dc6f345c..d7c6c0368f 100644
--- a/junit5/src/test/java/com/baeldung/FirstTest.java
+++ b/junit5/src/test/java/com/baeldung/FirstTest.java
@@ -1,5 +1,6 @@
 package com.baeldung;
 
+import org.junit.gen5.api.Disabled;
 import org.junit.gen5.api.Test;
 
 import static org.junit.gen5.api.Assertions.assertAll;
@@ -11,7 +12,7 @@ class FirstTest {
     @Test
     void lambdaExpressions() {
         String string = "";
-        assertTrue(() -> string.isEmpty(), "String should be empty");
+        assertTrue(string::isEmpty, "String should be empty");
     }
 
     @Test
@@ -24,4 +25,9 @@ class FirstTest {
         });
     }
 
+    @Test
+    @Disabled
+    void disabledTest() {
+        assertTrue(false);
+    }
 }
diff --git a/junit5/src/test/java/com/baeldung/TaggedTest.java b/junit5/src/test/java/com/baeldung/TaggedTest.java
new file mode 100644
index 0000000000..5107c04037
--- /dev/null
+++ b/junit5/src/test/java/com/baeldung/TaggedTest.java
@@ -0,0 +1,16 @@
+package com.baeldung;
+
+import org.junit.gen5.api.Tag;
+import org.junit.gen5.api.Test;
+
+import static org.junit.gen5.api.Assertions.assertEquals;
+
+@Tag("Test case")
+public class TaggedTest {
+
+    @Test
+    @Tag("Method")
+    void testMethod() {
+        assertEquals(2+2, 4);
+    }
+}

From f7176e6255e9cf3b72479e1b48d142bcf8e237f5 Mon Sep 17 00:00:00 2001
From: amedviediev <amedvyedyev@gmail.com>
Date: Wed, 11 May 2016 00:00:29 +0300
Subject: [PATCH 3/5] - Added code for JUnit 5 article

---
 .../src/test/java/com/baeldung/ExceptionTest.java   |  6 +++---
 junit5/src/test/java/com/baeldung/FirstTest.java    | 13 ++++++++++---
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/junit5/src/test/java/com/baeldung/ExceptionTest.java b/junit5/src/test/java/com/baeldung/ExceptionTest.java
index 26c44e8b10..25b7f0a1cc 100644
--- a/junit5/src/test/java/com/baeldung/ExceptionTest.java
+++ b/junit5/src/test/java/com/baeldung/ExceptionTest.java
@@ -11,8 +11,8 @@ public class ExceptionTest {
 
     @Test
     void shouldThrowException() {
-        ArrayList list = null;
-        Throwable exception = expectThrows(NullPointerException.class, list::clear);
-        assertEquals(exception.getClass(), NullPointerException.class);
+        Throwable exception = expectThrows(UnsupportedOperationException.class,
+                () -> {throw new UnsupportedOperationException("Not supported");});
+        assertEquals(exception.getMessage(), "Not supported");
     }
 }
diff --git a/junit5/src/test/java/com/baeldung/FirstTest.java b/junit5/src/test/java/com/baeldung/FirstTest.java
index d7c6c0368f..aa7bcfdcd0 100644
--- a/junit5/src/test/java/com/baeldung/FirstTest.java
+++ b/junit5/src/test/java/com/baeldung/FirstTest.java
@@ -3,6 +3,10 @@ package com.baeldung;
 import org.junit.gen5.api.Disabled;
 import org.junit.gen5.api.Test;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 import static org.junit.gen5.api.Assertions.assertAll;
 import static org.junit.gen5.api.Assertions.assertEquals;
 import static org.junit.gen5.api.Assertions.assertTrue;
@@ -11,13 +15,16 @@ class FirstTest {
 
     @Test
     void lambdaExpressions() {
-        String string = "";
-        assertTrue(string::isEmpty, "String should be empty");
+        List<Integer> numbers = Arrays.asList(1, 2, 3);
+        assertTrue(numbers
+                .stream()
+                .mapToInt(i -> i)
+                .sum() > 5, "Sum should be greater than 5");
     }
 
     @Test
     void groupAssertions() {
-        int[] numbers = {0,1,2,3,4};
+        int[] numbers = {0, 1, 2, 3, 4};
         assertAll("numbers", () -> {
             assertEquals(numbers[0], 1);
             assertEquals(numbers[3], 3);

From c4fdeee352dfa8fd9ed09c34d4c1491b39340847 Mon Sep 17 00:00:00 2001
From: amedviediev <amedvyedyev@gmail.com>
Date: Sat, 21 May 2016 16:25:09 +0300
Subject: [PATCH 4/5] - Fixed assertAll code

---
 junit5/src/test/java/com/baeldung/FirstTest.java | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/junit5/src/test/java/com/baeldung/FirstTest.java b/junit5/src/test/java/com/baeldung/FirstTest.java
index aa7bcfdcd0..2fa0f31a38 100644
--- a/junit5/src/test/java/com/baeldung/FirstTest.java
+++ b/junit5/src/test/java/com/baeldung/FirstTest.java
@@ -25,11 +25,11 @@ class FirstTest {
     @Test
     void groupAssertions() {
         int[] numbers = {0, 1, 2, 3, 4};
-        assertAll("numbers", () -> {
-            assertEquals(numbers[0], 1);
-            assertEquals(numbers[3], 3);
-            assertEquals(numbers[4], 1);
-        });
+        assertAll("numbers",
+                () -> assertEquals(numbers[0], 1),
+                () -> assertEquals(numbers[3], 3),
+                () -> assertEquals(numbers[4], 1)
+        );
     }
 
     @Test

From e641ca0598564fea42547903f8108006ba7244ae Mon Sep 17 00:00:00 2001
From: David Morley <david@davidmorley.me>
Date: Mon, 23 May 2016 06:14:18 -0500
Subject: [PATCH 5/5] Reformat JUnit 5 examples

---
 junit5/src/test/java/com/baeldung/AssumptionTest.java | 4 +---
 junit5/src/test/java/com/baeldung/ExceptionTest.java  | 6 +++---
 junit5/src/test/java/com/baeldung/FirstTest.java      | 5 +----
 junit5/src/test/java/com/baeldung/TaggedTest.java     | 2 +-
 4 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/junit5/src/test/java/com/baeldung/AssumptionTest.java b/junit5/src/test/java/com/baeldung/AssumptionTest.java
index 634ec9b21e..e4c2b56124 100644
--- a/junit5/src/test/java/com/baeldung/AssumptionTest.java
+++ b/junit5/src/test/java/com/baeldung/AssumptionTest.java
@@ -3,9 +3,7 @@ package com.baeldung;
 import org.junit.gen5.api.Test;
 
 import static org.junit.gen5.api.Assertions.assertEquals;
-import static org.junit.gen5.api.Assumptions.assumeFalse;
-import static org.junit.gen5.api.Assumptions.assumeTrue;
-import static org.junit.gen5.api.Assumptions.assumingThat;
+import static org.junit.gen5.api.Assumptions.*;
 
 public class AssumptionTest {
 
diff --git a/junit5/src/test/java/com/baeldung/ExceptionTest.java b/junit5/src/test/java/com/baeldung/ExceptionTest.java
index 25b7f0a1cc..5c30ad5b44 100644
--- a/junit5/src/test/java/com/baeldung/ExceptionTest.java
+++ b/junit5/src/test/java/com/baeldung/ExceptionTest.java
@@ -2,8 +2,6 @@ package com.baeldung;
 
 import org.junit.gen5.api.Test;
 
-import java.util.ArrayList;
-
 import static org.junit.gen5.api.Assertions.assertEquals;
 import static org.junit.gen5.api.Assertions.expectThrows;
 
@@ -12,7 +10,9 @@ public class ExceptionTest {
     @Test
     void shouldThrowException() {
         Throwable exception = expectThrows(UnsupportedOperationException.class,
-                () -> {throw new UnsupportedOperationException("Not supported");});
+                () -> {
+                    throw new UnsupportedOperationException("Not supported");
+                });
         assertEquals(exception.getMessage(), "Not supported");
     }
 }
diff --git a/junit5/src/test/java/com/baeldung/FirstTest.java b/junit5/src/test/java/com/baeldung/FirstTest.java
index 2fa0f31a38..4fc6037174 100644
--- a/junit5/src/test/java/com/baeldung/FirstTest.java
+++ b/junit5/src/test/java/com/baeldung/FirstTest.java
@@ -3,13 +3,10 @@ package com.baeldung;
 import org.junit.gen5.api.Disabled;
 import org.junit.gen5.api.Test;
 
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import static org.junit.gen5.api.Assertions.assertAll;
-import static org.junit.gen5.api.Assertions.assertEquals;
-import static org.junit.gen5.api.Assertions.assertTrue;
+import static org.junit.gen5.api.Assertions.*;
 
 class FirstTest {
 
diff --git a/junit5/src/test/java/com/baeldung/TaggedTest.java b/junit5/src/test/java/com/baeldung/TaggedTest.java
index 5107c04037..dbc82f4022 100644
--- a/junit5/src/test/java/com/baeldung/TaggedTest.java
+++ b/junit5/src/test/java/com/baeldung/TaggedTest.java
@@ -11,6 +11,6 @@ public class TaggedTest {
     @Test
     @Tag("Method")
     void testMethod() {
-        assertEquals(2+2, 4);
+        assertEquals(2 + 2, 4);
     }
 }