Fixed NoClassDefFoundError caused by latest Adventure-platform snapshot. (#4446)

* Bumped adventure versions

* Added Unit Test to ensure Adventure being set up correctly

pom.xml

@@ -219,27 +219,27 @@
         <dependency>
             <groupId>net.kyori</groupId>
             <artifactId>adventure-text-serializer-gson</artifactId>
-            <version>4.5.1</version>
+            <version>4.7.0</version>
         </dependency>
         <dependency>
             <groupId>net.kyori</groupId>
             <artifactId>adventure-api</artifactId>
-            <version>4.5.1</version>
+            <version>4.7.0</version>
         </dependency>
         <dependency>
             <groupId>net.kyori</groupId>
             <artifactId>adventure-nbt</artifactId>
-            <version>4.5.1</version>
+            <version>4.7.0</version>
         </dependency>
         <dependency>
             <groupId>net.kyori</groupId>
             <artifactId>adventure-key</artifactId>
-            <version>4.5.1</version>
+            <version>4.7.0</version>
         </dependency>
         <dependency>
             <groupId>net.kyori</groupId>
             <artifactId>adventure-text-serializer-gson-legacy-impl</artifactId>
-            <version>4.5.1</version>
+            <version>4.7.0</version>
         </dependency>
         <dependency>
             <groupId>net.kyori</groupId>

src/main/java/com/gmail/nossr50/util/text/TextUtils.java

@@ -16,9 +16,12 @@ import org.jetbrains.annotations.Nullable;
 import java.util.List;
 
 public class TextUtils {
-
     private static @Nullable LegacyComponentSerializer customLegacySerializer;
 
+    private TextUtils() {
+        // We don't want any instances of this class.
+    }
+
     /**
      * Makes a single component from an array of components, can optionally add prefixes and suffixes to come before and after each component
      * @param componentsArray target array

src/test/java/com/gmail/nossr50/util/text/TextUtilsTest.java

@@ -0,0 +1,33 @@
+package com.gmail.nossr50.util.text;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import net.kyori.adventure.text.TextComponent;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+/**
+ * This Unit Test checks if Adventure was set up correctly and works as expected.
+ * Normally we can rely on this to be the case. However sometimes our dependencies
+ * lack so far behind that things stop working correctly.
+ * This test ensures that basic functionality is guaranteed to work as we would expect.
+ * 
+ * See https://github.com/mcMMO-Dev/mcMMO/pull/4446
+ *
+ */
+public class TextUtilsTest {
+
+    @Test
+    public void testColorizeText() {
+        String inputText = "&4This text should be red.";
+
+        /*
+         * If this method raises an exception, we know Adventure is not set up correctly.
+         * This will also make the test fail and warn us about it.
+         */
+        TextComponent component = TextUtils.colorizeText(inputText);
+
+        Assert.assertEquals("Looks like Adventure is not working correctly.",
+                NamedTextColor.DARK_RED, component.color());
+    }
+}