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gnodet pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/camel.git

commit 2df874679e364509128d94f571892b6c3eed9ffa
Author: Guillaume Nodet <gno...@gmail.com>
AuthorDate: Tue Jun 9 17:36:25 2020 +0200

    [CAMEL-11807] Uprade camel-main to junit5
---
 core/camel-main/pom.xml                            |  21 ++-
 .../org/apache/camel/main/BaseMainSupport.java     |   4 +
 .../org/apache/camel/main/ContextEventsTest.java   |   7 +-
 .../java/org/apache/camel/main/MainBeansTest.java  |   9 +-
 .../camel/main/MainComponentConfigurationTest.java |   9 +-
 .../org/apache/camel/main/MainIoCAutowireTest.java |  11 +-
 .../MainIoCBeanConfigInjectConfigurerTest.java     |   7 +-
 .../camel/main/MainIoCBeanConfigInjectMapTest.java |   8 +-
 .../MainIoCBeanConfigInjectPropertiesTest.java     |   8 +-
 .../camel/main/MainIoCBeanConfigInjectTest.java    |   6 +-
 .../main/MainIoCNewRouteBuilderComplexTest.java    |   6 +-
 .../camel/main/MainIoCNewRouteBuilderTest.java     |   7 +-
 .../java/org/apache/camel/main/MainIoCTest.java    |  18 ++-
 .../org/apache/camel/main/MainListenerTest.java    |   7 +-
 .../apache/camel/main/MainLogPlaceholderTest.java  |   6 +-
 .../camel/main/MainPropertyPlaceholderTest.java    |  14 +-
 .../main/MainPropertyPlaceholderWithEnvTest.java   | 155 +++++++++++++++------
 .../MainPropertyPlaceholderWithSystemTest.java     |   6 +-
 .../apache/camel/main/MainRouteOrderedTest.java    |   6 +-
 .../main/MainRoutesCollectorPackageScanTest.java   |   7 +-
 .../apache/camel/main/MainRoutesCollectorTest.java |   7 +-
 .../java/org/apache/camel/main/MainSedaTest.java   |   8 +-
 .../apache/camel/main/MainSedaWildcardTest.java    |   8 +-
 ...gRouteControllerFilterFailToStartRouteTest.java |   7 +-
 .../main/MainSupervisingRouteControllerTest.java   |   8 +-
 .../camel/main/MainSupportCommandLineTest.java     |   3 +-
 .../test/java/org/apache/camel/main/MainTest.java  |  17 ++-
 .../org/apache/camel/main/MainThreadPoolTest.java  |   7 +-
 .../java/org/apache/camel/main/MainVetoTest.java   |   6 +-
 .../apache/camel/main/MainWithRestConfigTest.java  |   6 +-
 .../camel/main/ServicesAutoConfigurationTest.java  |   7 +-
 .../org/apache/camel/main/xml/MainXmlTest.java     |   7 +-
 32 files changed, 263 insertions(+), 150 deletions(-)

diff --git a/core/camel-main/pom.xml b/core/camel-main/pom.xml
index 57c80f0..c8dd636 100644
--- a/core/camel-main/pom.xml
+++ b/core/camel-main/pom.xml
@@ -112,26 +112,25 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>${mockito-version}</version>
+            <groupId>org.junit.vintage</groupId>
+            <artifactId>junit-vintage-engine</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.powermock</groupId>
-            <artifactId>powermock-module-junit4</artifactId>
-            <version>${powermock-version}</version>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>1.6.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.powermock</groupId>
-            <artifactId>powermock-api-mockito2</artifactId>
-            <version>${powermock-version}</version>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>${mockito-version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git 
a/core/camel-main/src/main/java/org/apache/camel/main/BaseMainSupport.java 
b/core/camel-main/src/main/java/org/apache/camel/main/BaseMainSupport.java
index 1a1b2e8..52f72cd 100644
--- a/core/camel-main/src/main/java/org/apache/camel/main/BaseMainSupport.java
+++ b/core/camel-main/src/main/java/org/apache/camel/main/BaseMainSupport.java
@@ -79,6 +79,7 @@ import org.slf4j.LoggerFactory;
 
 import static 
org.apache.camel.main.MainHelper.loadEnvironmentVariablesAsProperties;
 import static org.apache.camel.main.MainHelper.lookupPropertyFromSysOrEnv;
+import static org.apache.camel.main.MainHelper.toEnvVar;
 import static org.apache.camel.support.ObjectHelper.invokeMethod;
 import static org.apache.camel.util.ReflectionHelper.findMethod;
 import static org.apache.camel.util.StringHelper.matches;
@@ -1097,6 +1098,9 @@ public abstract class BaseMainSupport extends BaseService 
{
         // load properties from ENV (override existing)
         if 
(mainConfigurationProperties.isAutoConfigurationEnvironmentVariablesEnabled()) {
             Properties propENV = loadEnvironmentVariablesAsProperties(new 
String[]{"camel.main."});
+            propENV.remove(INITIAL_PROPERTIES_LOCATION.replace('-', '.'));
+            propENV.remove(OVERRIDE_PROPERTIES_LOCATION.replace('-', '.'));
+            propENV.remove(PROPERTY_PLACEHOLDER_LOCATION.replace('-', '.'));
             if (!propENV.isEmpty()) {
                 prop.putAll(propENV);
             }
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/ContextEventsTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/ContextEventsTest.java
index 01b3aed..8083a65 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/ContextEventsTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/ContextEventsTest.java
@@ -22,10 +22,11 @@ import org.apache.camel.BindToRegistry;
 import org.apache.camel.spi.OnCamelContextInitialized;
 import org.apache.camel.spi.OnCamelContextStart;
 import org.apache.camel.spi.OnCamelContextStop;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class ContextEventsTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ContextEventsTest {
     @Test
     public void testEvents() throws Exception {
         MyConfig config = new MyConfig();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainBeansTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainBeansTest.java
index 7626346..48b8c0d 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainBeansTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainBeansTest.java
@@ -18,10 +18,13 @@ package org.apache.camel.main;
 
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainBeansTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+public class MainBeansTest {
 
     @Test
     public void testBindBeans() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainComponentConfigurationTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainComponentConfigurationTest.java
index a2360ba..6fa1f20 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainComponentConfigurationTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainComponentConfigurationTest.java
@@ -19,10 +19,13 @@ package org.apache.camel.main;
 import java.util.Properties;
 
 import org.apache.camel.main.support.MyDummyComponent;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainComponentConfigurationTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class MainComponentConfigurationTest {
     @Test
     public void testComponentConfiguration() {
         Properties properties = new Properties();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCAutowireTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCAutowireTest.java
index 17e8e21..033282a 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCAutowireTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCAutowireTest.java
@@ -35,10 +35,13 @@ import org.apache.camel.support.DefaultAsyncProducer;
 import org.apache.camel.support.DefaultComponent;
 import org.apache.camel.support.DefaultConsumer;
 import org.apache.camel.support.DefaultEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCAutowireTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class MainIoCAutowireTest {
     @Test
     public void autowireNonNullOnlyDisabledTest() {
         Main main = new Main();
@@ -105,7 +108,7 @@ public class MainIoCAutowireTest extends Assert {
         @BindToRegistry
         public BlockingQueueFactory queueFactory(CamelContext myCamel) {
             // we can optionally include camel context as parameter
-            Assert.assertNotNull(myCamel);
+            assertNotNull(myCamel);
             return new PriorityBlockingQueueFactory();
         }
     }
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectConfigurerTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectConfigurerTest.java
index f8ceca8..e7ce52f 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectConfigurerTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectConfigurerTest.java
@@ -22,10 +22,11 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
 import org.apache.camel.spi.GeneratedPropertyConfigurer;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCBeanConfigInjectConfigurerTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class MainIoCBeanConfigInjectConfigurerTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectMapTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectMapTest.java
index d573636..ba66f68 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectMapTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectMapTest.java
@@ -23,10 +23,12 @@ import org.apache.camel.BindToRegistry;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCBeanConfigInjectMapTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+public class MainIoCBeanConfigInjectMapTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectPropertiesTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectPropertiesTest.java
index 3717450..df212fa 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectPropertiesTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectPropertiesTest.java
@@ -23,10 +23,12 @@ import org.apache.camel.BindToRegistry;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCBeanConfigInjectPropertiesTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+public class MainIoCBeanConfigInjectPropertiesTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectTest.java
index 7ecbbd5..25c82cd 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCBeanConfigInjectTest.java
@@ -21,10 +21,10 @@ import org.apache.camel.BindToRegistry;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCBeanConfigInjectTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainIoCBeanConfigInjectTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderComplexTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderComplexTest.java
index eae5917..a48e1b6 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderComplexTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderComplexTest.java
@@ -21,10 +21,10 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.PropertyInject;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCNewRouteBuilderComplexTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainIoCNewRouteBuilderComplexTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderTest.java
index e670b7c..6d576ef 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCNewRouteBuilderTest.java
@@ -22,10 +22,11 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.PropertyInject;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCNewRouteBuilderTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainIoCNewRouteBuilderTest {
 
     @Test
     public void testMainIoC() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCTest.java
index 66d9df4..692e7f8 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainIoCTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainIoCTest.java
@@ -27,10 +27,14 @@ import org.apache.camel.component.seda.BlockingQueueFactory;
 import org.apache.camel.component.seda.PriorityBlockingQueueFactory;
 import org.apache.camel.component.seda.SedaComponent;
 import org.apache.camel.model.ModelCamelContext;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainIoCTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class MainIoCTest {
 
     @Test
     public void testMainIoC() throws Exception {
@@ -121,7 +125,7 @@ public class MainIoCTest extends Assert {
         @BindToRegistry
         public BlockingQueueFactory queueFactory(CamelContext myCamel) {
             // we can optionally include camel context as parameter
-            Assert.assertNotNull(myCamel);
+            assertNotNull(myCamel);
             return new PriorityBlockingQueueFactory();
         }
 
@@ -130,9 +134,9 @@ public class MainIoCTest extends Assert {
                            @PropertyInject(value = "magic", defaultValue = 
"456") int num,
                            @BeanInject("myBar") MyBar bar) {
             // should lookup MyCoolBean type from the registry and find the 
property
-            Assert.assertNotNull(cool);
-            Assert.assertEquals(456, num);
-            Assert.assertNotNull(bar);
+            assertNotNull(cool);
+            assertEquals(456, num);
+            assertNotNull(bar);
             return cool.getName();
         }
 
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainListenerTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainListenerTest.java
index a0398a4..ec70d43 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainListenerTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainListenerTest.java
@@ -21,12 +21,13 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import static org.apache.camel.util.CollectionHelper.propertiesOf;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
 
-public class MainListenerTest extends Assert {
+public class MainListenerTest {
 
     @Test
     public void testEventOrder() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainLogPlaceholderTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainLogPlaceholderTest.java
index deabe4b..47efc4d 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainLogPlaceholderTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainLogPlaceholderTest.java
@@ -18,10 +18,10 @@ package org.apache.camel.main;
 
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainLogPlaceholderTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+public class MainLogPlaceholderTest {
 
     @Test
     public void testMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderTest.java
index a065a49..ade9280 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderTest.java
@@ -16,17 +16,23 @@
  */
 package org.apache.camel.main;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainPropertyPlaceholderTest extends Assert {
-    @Test(expected = IllegalArgumentException.class)
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class MainPropertyPlaceholderTest {
+    @Test
     public void testDefaultPropertyPlaceholderLocationDisabled() {
         Main main = new Main();
         try {
             main.setDefaultPropertyPlaceholderLocation("false");
             main.start();
             main.getCamelContext().resolvePropertyPlaceholders("{{hello}}");
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            // ok
         } finally {
             main.stop();
         }
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithEnvTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithEnvTest.java
index 9f1b6a6..ae00e08 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithEnvTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithEnvTest.java
@@ -16,36 +16,30 @@
  */
 package org.apache.camel.main;
 
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Properties;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
 
 import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
 
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore({"javax.management.*", "javax.script.*"})
-@PrepareForTest(MainHelper.class)
 public class MainPropertyPlaceholderWithEnvTest {
+
     public static final String ENV_PROPERTY_PLACEHOLDER_LOCATION = 
MainHelper.toEnvVar(Main.PROPERTY_PLACEHOLDER_LOCATION);
     public static final String ENV_INITIAL_PROPERTIES_LOCATION = 
MainHelper.toEnvVar(Main.INITIAL_PROPERTIES_LOCATION);
     public static final String ENV_OVERRIDE_PROPERTIES_LOCATION = 
MainHelper.toEnvVar(Main.OVERRIDE_PROPERTIES_LOCATION);
 
-    @Before
-    public void setUp() {
-        PowerMockito.mockStatic(System.class);
-    }
+    private static final Map<String, String> THE_CASE_INSENSITIVE_ENVIRONMENT 
= new HashMap<>();
+
+    protected final Map<String, String> env = new HashMap<>();
+    protected final Map<String, String> sys = new HashMap<>();
 
     @Test
     public void testPropertyPlaceholderLocation() {
-        when(System.getenv(ENV_PROPERTY_PLACEHOLDER_LOCATION))
-            .thenReturn("classpath:default.properties");
+        envVariable(ENV_PROPERTY_PLACEHOLDER_LOCATION, 
"classpath:default.properties");
 
         Main main = new Main();
         try {
@@ -58,10 +52,8 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testPropertyPlaceholderOrdering() {
-        
when(System.getenv(MainHelper.toEnvVar(Main.PROPERTY_PLACEHOLDER_LOCATION)))
-            .thenReturn("classpath:default.properties");
-        when(System.getProperty(Main.PROPERTY_PLACEHOLDER_LOCATION))
-            .thenReturn("classpath:user.properties");
+        envVariable(ENV_PROPERTY_PLACEHOLDER_LOCATION, 
"classpath:default.properties");
+        sysVariable(Main.PROPERTY_PLACEHOLDER_LOCATION, 
"classpath:user.properties");
 
         Main main = new Main();
         try {
@@ -74,8 +66,7 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testInitialProperties() {
-        when(System.getenv(ENV_INITIAL_PROPERTIES_LOCATION))
-            .thenReturn("classpath:initial.properties");
+        envVariable(ENV_INITIAL_PROPERTIES_LOCATION, 
"classpath:initial.properties");
 
         Main main = new Main();
         try {
@@ -88,10 +79,8 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testInitialPropertiesOrdering() {
-        when(System.getenv(ENV_INITIAL_PROPERTIES_LOCATION))
-            .thenReturn("classpath:default.properties");
-        when(System.getProperty(Main.INITIAL_PROPERTIES_LOCATION))
-            .thenReturn("classpath:user.properties");
+        envVariable(ENV_INITIAL_PROPERTIES_LOCATION, 
"classpath:default.properties");
+        sysVariable(Main.INITIAL_PROPERTIES_LOCATION, 
"classpath:user.properties");
 
         Main main = new Main();
         try {
@@ -104,8 +93,7 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testInstanceInitialPropertiesOrdering() {
-        when(System.getenv(ENV_INITIAL_PROPERTIES_LOCATION))
-            .thenReturn("classpath:initial.properties");
+        envVariable(ENV_INITIAL_PROPERTIES_LOCATION, 
"classpath:initial.properties");
 
         Main main = new Main();
         try {
@@ -122,8 +110,7 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testOverrideProperties() {
-        when(System.getenv(ENV_OVERRIDE_PROPERTIES_LOCATION))
-            .thenReturn("classpath:override.properties");
+        envVariable(ENV_OVERRIDE_PROPERTIES_LOCATION, 
"classpath:override.properties");
 
         Main main = new Main();
         try {
@@ -136,8 +123,7 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testInstanceOverridePropertiesOrdering() {
-        when(System.getenv(ENV_OVERRIDE_PROPERTIES_LOCATION))
-            .thenReturn("classpath:override.properties");
+        envVariable(ENV_OVERRIDE_PROPERTIES_LOCATION, 
"classpath:override.properties");
 
         Main main = new Main();
         try {
@@ -154,10 +140,8 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testOverridePropertiesOrdering() {
-        when(System.getenv(ENV_OVERRIDE_PROPERTIES_LOCATION))
-            .thenReturn("classpath:default.properties");
-        when(System.getProperty(Main.OVERRIDE_PROPERTIES_LOCATION))
-            .thenReturn("classpath:user.properties");
+        envVariable(ENV_OVERRIDE_PROPERTIES_LOCATION, 
"classpath:default.properties");
+        sysVariable(Main.OVERRIDE_PROPERTIES_LOCATION, 
"classpath:user.properties");
 
         Main main = new Main();
         try {
@@ -171,12 +155,9 @@ public class MainPropertyPlaceholderWithEnvTest {
 
     @Test
     public void testAll() {
-        when(System.getenv(ENV_INITIAL_PROPERTIES_LOCATION))
-            .thenReturn("classpath:initial.properties");
-        when(System.getenv(ENV_OVERRIDE_PROPERTIES_LOCATION))
-            .thenReturn("classpath:override.properties");
-        when(System.getenv(ENV_PROPERTY_PLACEHOLDER_LOCATION))
-            
.thenReturn("classpath:default.properties,classpath:user.properties");
+        envVariable(ENV_INITIAL_PROPERTIES_LOCATION, 
"classpath:initial.properties");
+        envVariable(ENV_OVERRIDE_PROPERTIES_LOCATION, 
"classpath:override.properties");
+        envVariable(ENV_PROPERTY_PLACEHOLDER_LOCATION, 
"classpath:default.properties,classpath:user.properties");
 
         Main main = new Main();
         try {
@@ -190,4 +171,92 @@ public class MainPropertyPlaceholderWithEnvTest {
             main.stop();
         }
     }
+
+    @AfterEach
+    protected void tearDown() {
+        for (Map.Entry<String, String> e : env.entrySet()) {
+            doEnvVariable(e.getKey(), e.getValue());
+        }
+        env.clear();
+        for (Map.Entry<String, String> e : sys.entrySet()) {
+            doSysVariable(e.getKey(), e.getValue());
+        }
+        sys.clear();
+    }
+
+    protected void envVariable(String name, String value) {
+        env.put(name, System.getenv(name));
+        doEnvVariable(name, value);
+    }
+
+    protected void sysVariable(String name, String value) {
+        sys.put(name, System.getProperty(name));
+        doSysVariable(name, value);
+    }
+
+    private void doEnvVariable(String name, String value) {
+        if (value != null) {
+            getEditableMapOfVariables().put(name, value);
+            getTheCaseInsensitiveEnvironment().put(name, value);
+        } else {
+            getEditableMapOfVariables().remove(name);
+            getTheCaseInsensitiveEnvironment().remove(name);
+        }
+    }
+
+    private void doSysVariable(String name, String value) {
+        if (value != null) {
+            System.setProperty(name, value);
+        } else {
+            System.getProperties().remove(name);
+        }
+    }
+
+    private static Map<String, String> getEditableMapOfVariables() {
+        Class<?> classOfMap = System.getenv().getClass();
+        try {
+            return getFieldValue(classOfMap, System.getenv(), "m");
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException("System Rules cannot access the field"
+                    + " 'm' of the map System.getenv().", e);
+        } catch (NoSuchFieldException e) {
+            throw new RuntimeException("System Rules expects System.getenv() 
to"
+                    + " have a field 'm' but it has not.", e);
+        }
+    }
+
+    /*
+     * The names of environment variables are case-insensitive in Windows.
+     * Therefore it stores the variables in a TreeMap named
+     * theCaseInsensitiveEnvironment.
+     */
+    private static Map<String, String> getTheCaseInsensitiveEnvironment() {
+        try {
+            Class<?> processEnvironment = 
Class.forName("java.lang.ProcessEnvironment");
+            return getFieldValue(
+                    processEnvironment, null, "theCaseInsensitiveEnvironment");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("System Rules expects the existence of"
+                    + " the class java.lang.ProcessEnvironment but it does not"
+                    + " exist.", e);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException("System Rules cannot access the static"
+                    + " field 'theCaseInsensitiveEnvironment' of the class"
+                    + " java.lang.ProcessEnvironment.", e);
+        } catch (NoSuchFieldException e) {
+            //this field is only available for Windows so return a unused map
+            return THE_CASE_INSENSITIVE_ENVIRONMENT;
+        }
+    }
+
+    private static Map<String, String> getFieldValue(
+            Class<?> klass,
+            Object object,
+            String name
+    ) throws NoSuchFieldException, IllegalAccessException {
+        Field field = klass.getDeclaredField(name);
+        field.setAccessible(true);
+        return (Map<String, String>) field.get(object);
+    }
+
 }
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithSystemTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithSystemTest.java
index 98365d7..23ccc37 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithSystemTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainPropertyPlaceholderWithSystemTest.java
@@ -18,10 +18,10 @@ package org.apache.camel.main;
 
 import java.util.Properties;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainPropertyPlaceholderWithSystemTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+public class MainPropertyPlaceholderWithSystemTest {
     @Test
     public void testCustomPropertyPlaceholderLocation() {
         Main main = new Main();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRouteOrderedTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRouteOrderedTest.java
index 3c50cb0..824e293 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRouteOrderedTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRouteOrderedTest.java
@@ -18,10 +18,10 @@ package org.apache.camel.main;
 
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainRouteOrderedTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+public class MainRouteOrderedTest {
 
     @Test
     public void testOrdered() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorPackageScanTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorPackageScanTest.java
index 06a4b1d..360ff78 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorPackageScanTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorPackageScanTest.java
@@ -18,10 +18,11 @@ package org.apache.camel.main;
 
 import org.apache.camel.CamelContext;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainRoutesCollectorPackageScanTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainRoutesCollectorPackageScanTest {
 
     @Test
     public void testMainRoutesCollector() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorTest.java
index 56ab2ec..f1edae9 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainRoutesCollectorTest.java
@@ -19,10 +19,11 @@ package org.apache.camel.main;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainRoutesCollectorTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainRoutesCollectorTest {
 
     @Test
     public void testMainRoutesCollector() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSedaTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSedaTest.java
index 07bb38e..a73afb3 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainSedaTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainSedaTest.java
@@ -19,10 +19,12 @@ package org.apache.camel.main;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.seda.SedaComponent;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainSedaTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+public class MainSedaTest {
 
     @Test
     public void testSedaMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSedaWildcardTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSedaWildcardTest.java
index e6f884a..5a81f87 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSedaWildcardTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSedaWildcardTest.java
@@ -19,10 +19,12 @@ package org.apache.camel.main;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.seda.SedaComponent;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainSedaWildcardTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+public class MainSedaWildcardTest {
 
     @Test
     public void testSedaWildcardMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerFilterFailToStartRouteTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerFilterFailToStartRouteTest.java
index 6f064e1..5c7d114 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerFilterFailToStartRouteTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerFilterFailToStartRouteTest.java
@@ -26,10 +26,11 @@ import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.seda.SedaComponent;
 import org.apache.camel.component.seda.SedaConsumer;
 import org.apache.camel.component.seda.SedaEndpoint;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainSupervisingRouteControllerFilterFailToStartRouteTest extends 
Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+public class MainSupervisingRouteControllerFilterFailToStartRouteTest {
 
     @Test
     public void testMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerTest.java
index 53a1a71..c65f767 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupervisingRouteControllerTest.java
@@ -29,10 +29,12 @@ import org.apache.camel.component.seda.SedaComponent;
 import org.apache.camel.component.seda.SedaConsumer;
 import org.apache.camel.component.seda.SedaEndpoint;
 import org.apache.camel.spi.SupervisingRouteController;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainSupervisingRouteControllerTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+public class MainSupervisingRouteControllerTest {
 
     @Test
     public void testMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupportCommandLineTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupportCommandLineTest.java
index 6d9c30f..bd8072c 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainSupportCommandLineTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainSupportCommandLineTest.java
@@ -19,8 +19,7 @@ package org.apache.camel.main;
 import org.apache.camel.CamelContext;
 import org.apache.camel.ProducerTemplate;
 import org.apache.camel.impl.DefaultCamelContext;
-import org.junit.Test;
-
+import org.junit.jupiter.api.Test;
 public class MainSupportCommandLineTest {
 
     private class MyMainSupport extends MainCommandLineSupport {
diff --git a/core/camel-main/src/test/java/org/apache/camel/main/MainTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainTest.java
index f9dcf4d..d3e1b51 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainTest.java
@@ -22,12 +22,15 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.component.mock.MockEndpoint;
 import org.apache.camel.spi.ManagementStrategy;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import static org.apache.camel.util.CollectionHelper.propertiesOf;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
-public class MainTest extends Assert {
+public class MainTest {
 
     @Test
     public void testMain() throws Exception {
@@ -41,7 +44,7 @@ public class MainTest extends Assert {
         CamelContext camelContext = main.getCamelContext();
 
         assertNotNull(camelContext);
-        assertEquals("Could not find the registry bound object", 31, 
camelContext.getRegistry().lookupByName("foo"));
+        assertEquals(31, camelContext.getRegistry().lookupByName("foo"), 
"Could not find the registry bound object");
 
         MockEndpoint endpoint = camelContext.getEndpoint("mock:results", 
MockEndpoint.class);
         endpoint.expectedMinimumMessageCount(1);
@@ -68,7 +71,7 @@ public class MainTest extends Assert {
 
         CamelContext camelContext = main.getCamelContext();
 
-        assertEquals("Could not find the registry bound object", 31, 
camelContext.getRegistry().lookupByName("foo"));
+        assertEquals(31, camelContext.getRegistry().lookupByName("foo"), 
"Could not find the registry bound object");
 
         MockEndpoint endpoint = camelContext.getEndpoint("mock:results", 
MockEndpoint.class);
         endpoint.expectedMinimumMessageCount(1);
@@ -119,7 +122,7 @@ public class MainTest extends Assert {
         main.start();
 
         CamelContext camelContext = main.getCamelContext();
-        assertFalse("Tracing should be disabled", camelContext.isTracing());
+        assertFalse(camelContext.isTracing(), "Tracing should be disabled");
 
         main.stop();
     }
@@ -142,7 +145,7 @@ public class MainTest extends Assert {
         CamelContext camelContext = main.getCamelContext();
         ManagementStrategy strategy = camelContext.getManagementStrategy();
 
-        assertEquals("DurationMaxMessages should be set to 1", 1, 
durationMaxMessages.get());
+        assertEquals(1, durationMaxMessages.get(), "DurationMaxMessages should 
be set to 1");
         assertTrue(strategy.getEventNotifiers().stream().anyMatch(n -> n 
instanceof MainDurationEventNotifier));
 
         main.stop();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainThreadPoolTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainThreadPoolTest.java
index ac25e8c..f5225c5 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainThreadPoolTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainThreadPoolTest.java
@@ -19,10 +19,11 @@ package org.apache.camel.main;
 import org.apache.camel.CamelContext;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.spi.ThreadPoolProfile;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainThreadPoolTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainThreadPoolTest {
 
     @Test
     public void testDefaultThreadPool() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainVetoTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/MainVetoTest.java
index 58099d3..145374a 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/MainVetoTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/MainVetoTest.java
@@ -20,10 +20,10 @@ import org.apache.camel.CamelContext;
 import org.apache.camel.VetoCamelContextStartException;
 import org.apache.camel.builder.RouteBuilder;
 import org.apache.camel.support.LifecycleStrategySupport;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainVetoTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+public class MainVetoTest {
 
     @Test
     public void testMain() throws Exception {
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/MainWithRestConfigTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/MainWithRestConfigTest.java
index 64e0b9d..73d0973 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/MainWithRestConfigTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/MainWithRestConfigTest.java
@@ -19,10 +19,10 @@ package org.apache.camel.main;
 import java.util.Properties;
 
 import org.apache.camel.builder.RouteBuilder;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainWithRestConfigTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+public class MainWithRestConfigTest {
     @Test
     public void testRestConfigurationPropagation() {
         Properties properties = new Properties();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/ServicesAutoConfigurationTest.java
 
b/core/camel-main/src/test/java/org/apache/camel/main/ServicesAutoConfigurationTest.java
index 581619c..e176d68 100644
--- 
a/core/camel-main/src/test/java/org/apache/camel/main/ServicesAutoConfigurationTest.java
+++ 
b/core/camel-main/src/test/java/org/apache/camel/main/ServicesAutoConfigurationTest.java
@@ -19,10 +19,11 @@ package org.apache.camel.main;
 import java.util.Properties;
 
 import org.apache.camel.component.seda.SedaComponent;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class ServicesAutoConfigurationTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+public class ServicesAutoConfigurationTest {
     @Test
     public void 
testComponentAutoConfiguredWhenGlobalAutoConfigurationIsDisabled() {
         Properties properties = new Properties();
diff --git 
a/core/camel-main/src/test/java/org/apache/camel/main/xml/MainXmlTest.java 
b/core/camel-main/src/test/java/org/apache/camel/main/xml/MainXmlTest.java
index 8b3b331..837a1b8 100644
--- a/core/camel-main/src/test/java/org/apache/camel/main/xml/MainXmlTest.java
+++ b/core/camel-main/src/test/java/org/apache/camel/main/xml/MainXmlTest.java
@@ -19,10 +19,11 @@ package org.apache.camel.main.xml;
 import org.apache.camel.CamelContext;
 import org.apache.camel.component.mock.MockEndpoint;
 import org.apache.camel.main.Main;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-public class MainXmlTest extends Assert {
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+public class MainXmlTest {
 
     @Test
     public void testMainRoutesCollector() throws Exception {

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