Merge pull request #6817 from alimate/BAEL-2915

Bael 2915: Null and Empty Sources for JUnit 5

testing-modules/junit-5/pom.xml

@@ -103,13 +103,6 @@
             <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>${maven-surefire-plugin.version}</version>
-                <dependencies>
-                    <dependency>
-                        <groupId>org.junit.platform</groupId>
-                        <artifactId>junit-platform-surefire-provider</artifactId>
-                        <version>${junit.platform.version}</version>
-                    </dependency>
-                </dependencies>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
@@ -130,10 +123,10 @@
     </build>
 
     <properties>
-        <junit.jupiter.version>5.3.1</junit.jupiter.version>
+        <junit.jupiter.version>5.4.2</junit.jupiter.version>
         <mockito.junit.jupiter.version>2.23.0</mockito.junit.jupiter.version>
-        <junit.platform.version>1.2.0</junit.platform.version>
+        <junit.platform.version>1.4.2</junit.platform.version>
-        <junit.vintage.version>5.2.0</junit.vintage.version>
+        <junit.vintage.version>5.4.2</junit.vintage.version>
         <log4j2.version>2.8.2</log4j2.version>
         <h2.version>1.4.196</h2.version>
         <powermock.version>2.0.0-RC.1</powermock.version>

testing-modules/junit-5/src/test/java/com/baeldung/parameterized/StringsUnitTest.java

@@ -86,7 +86,30 @@ class StringsUnitTest {
         assertEquals(expected, actualValue);
     }
 
+    @ParameterizedTest
+    @NullSource
+    void isBlank_ShouldReturnTrueForNullInputs(String input) {
+        assertTrue(Strings.isBlank(input));
+    }
 
+    @ParameterizedTest
+    @EmptySource
+    void isBlank_ShouldReturnTrueForEmptyStrings(String input) {
+        assertTrue(Strings.isBlank(input));
+    }
+
+    @ParameterizedTest
+    @NullAndEmptySource
+    void isBlank_ShouldReturnTrueForNullAndEmptyStrings(String input) {
+        assertTrue(Strings.isBlank(input));
+    }
+
+    @ParameterizedTest
+    @NullAndEmptySource
+    @ValueSource(strings = {"  ", "\t", "\n"})
+    void isBlank_ShouldReturnTrueForAllTypesOfBlankStrings(String input) {
+        assertTrue(Strings.isBlank(input));
+    }
 
     private static Stream<Arguments> provideStringsForIsBlank() {
         return Stream.of(