[CI skip] Some unit test changes

src/main/java/io/github/thebusybiscuit/slimefun4/api/MinecraftVersion.java

@@ -155,6 +155,21 @@ public enum MinecraftVersion {
             return false;
         }
 
+        /**
+         * Unit-Test only code.
+         * Running #isAtLeast(...) should always be meaningful.
+         * If the provided version equals the lowest supported version, then
+         * this will essentially always return true and result in a tautology.
+         * This is most definitely an oversight from us and should be fixed, therefore
+         * we will trigger an exception.
+         * 
+         * In order to not disrupt server operations, this exception is only thrown during
+         * unit tests since the oversight itself will be harmless.
+         */
+        if (this == UNIT_TEST && version.ordinal() == 0) {
+            throw new IllegalArgumentException("Version " + version + " is the lowest supported version already!");
+        }
+
         return this.ordinal() >= version.ordinal();
     }
 

src/test/java/io/github/thebusybiscuit/slimefun4/utils/TestMinecraftVersion.java

@@ -58,4 +58,10 @@ class TestMinecraftVersion {
         Assertions.assertThrows(IllegalArgumentException.class, () -> MinecraftVersion.MINECRAFT_1_14.isBefore(null));
     }
 
+    @Test
+    @DisplayName("Test warning system for lowest supported version checks")
+    void testLowestSupportedVersion() {
+        Assertions.assertThrows(IllegalArgumentException.class, () -> MinecraftVersion.UNIT_TEST.isAtLeast(MinecraftVersion.MINECRAFT_1_14));
+    }
+
 }

src/test/java/io/github/thebusybiscuit/slimefun4/utils/TestWikiResource.java

@@ -6,25 +6,24 @@ import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
 import com.google.gson.JsonElement;
-import com.google.gson.JsonParser;
 
 class TestWikiResource {
 
     @Test
     @DisplayName("Test wiki.json file format")
     void testWikiJson() throws IOException {
-        JsonParser parser = new JsonParser();
         Pattern pattern = Pattern.compile("[A-Z_0-9]+");
 
         // Here we test for any Syntax errors in our wiki.json file
         try (BufferedReader reader = new BufferedReader(new InputStreamReader(getClass().getResourceAsStream("/wiki.json"), StandardCharsets.UTF_8))) {
-            JsonElement json = parser.parse(reader);
+            JsonElement json = JsonUtils.parseString(reader.lines().collect(Collectors.joining("")));
             Assertions.assertTrue(json.isJsonObject());
 
             for (Map.Entry<String, JsonElement> entry : json.getAsJsonObject().entrySet()) {

src/test/java/io/github/thebusybiscuit/slimefun4/utils/biomes/TestBiomeMapCompatibility.java

@@ -24,10 +24,10 @@ import org.junit.jupiter.params.provider.MethodSource;
 
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
-import com.google.gson.JsonParser;
 
 import io.github.thebusybiscuit.slimefun4.api.MinecraftVersion;
 import io.github.thebusybiscuit.slimefun4.implementation.Slimefun;
+import io.github.thebusybiscuit.slimefun4.utils.JsonUtils;
 
 import be.seeseemelk.mockbukkit.MockBukkit;
 
@@ -66,8 +66,7 @@ class TestBiomeMapCompatibility {
         }
 
         try (BufferedReader reader = new BufferedReader(new InputStreamReader(Slimefun.class.getResourceAsStream(path), StandardCharsets.UTF_8))) {
-            JsonParser parser = new JsonParser();
-            JsonArray biomes = parser.parse(reader.lines().collect(Collectors.joining(""))).getAsJsonArray();
+            JsonArray biomes = JsonUtils.parseString(reader.lines().collect(Collectors.joining(""))).getAsJsonArray();
 
             compatibilityMap.put(version, biomes);
         } catch (IOException x) {
@@ -161,8 +160,7 @@ class TestBiomeMapCompatibility {
 
         String path = "/biome-maps/" + name + ".json";
         try (BufferedReader reader = new BufferedReader(new InputStreamReader(Slimefun.class.getResourceAsStream(path), StandardCharsets.UTF_8))) {
-            JsonParser parser = new JsonParser();
-            JsonArray root = parser.parse(reader.lines().collect(Collectors.joining(""))).getAsJsonArray();
+            JsonArray root = JsonUtils.parseString(reader.lines().collect(Collectors.joining(""))).getAsJsonArray();
 
             for (JsonElement element : root) {
                 JsonArray biomes = element.getAsJsonObject().getAsJsonArray("biomes");