Don't attempt to load CC config from file in tests

Author: CursedFlames

src/main/java/io/github/opencubicchunks/cubicchunks/CubicChunks.java

@@ -18,6 +18,10 @@
  */
 @Mod("cubicchunks")
 public class CubicChunks extends CubicChunksBase {
+    /**
+     * true when running in a junit test, false otherwise.
+     */
+    public static boolean IS_IN_TEST = false;
     protected static CommonConfig config = null;
     // For hardcoding height in P1
     public static final int SUPERFLAT_HEIGHT = 5;

src/main/java/io/github/opencubicchunks/cubicchunks/config/CommonConfig.java

@@ -4,12 +4,14 @@
 
 import com.electronwill.nightconfig.core.CommentedConfig;
 import com.electronwill.nightconfig.core.Config;
+import io.github.opencubicchunks.cubicchunks.CubicChunks;
 import net.neoforged.fml.loading.FMLPaths;
 
 public class CommonConfig extends BaseConfig {
     private static final String FILE_NAME = "cubicchunks_common.toml";
     // TODO forge/fabric-agnostic method for getting config directory
-    private static final File FILE_PATH = new File(FMLPaths.CONFIGDIR.get().toFile(), FILE_NAME);
+    // Note that this relies on IS_IN_TEST being set before this class is classloaded
+    private static final File FILE_PATH = CubicChunks.IS_IN_TEST ? null : new File(FMLPaths.CONFIGDIR.get().toFile(), FILE_NAME);
 
     private static final String KEY_GENERAL = "general";
     private static final String KEY_VERTICAL_VIEW_DISTANCE = KEY_GENERAL + ".verticalViewDistance";
@@ -60,6 +62,10 @@ public void setGenerateNewWorldsAsCC(boolean generateNewWorldsAsCC) {
 
     public static CommonConfig getConfig() {
         var config = createDefaultConfig();
+        if (CubicChunks.IS_IN_TEST) {
+            // Skip file access when running in a test environment; tests should manually update relevant config values before running game code.
+            return new CommonConfig(config);
+        }
         // Read existing values to the config
         if (FILE_PATH.exists()) {
             read(FILE_PATH, config);

src/test/java/io/github/opencubicchunks/cubicchunks/testutils/BaseTest.java

@@ -1,5 +1,6 @@
 package io.github.opencubicchunks.cubicchunks.testutils;
 
+import io.github.opencubicchunks.cubicchunks.CubicChunks;
 import net.minecraft.SharedConstants;
 import net.minecraft.server.Bootstrap;
 import org.junit.jupiter.api.AfterEach;
@@ -12,6 +13,7 @@ public class BaseTest {
     @BeforeAll
     public static void setup() {
         SharedConstants.tryDetectVersion();
+        CubicChunks.IS_IN_TEST = true;
         Bootstrap.bootStrap();
         SharedConstants.IS_RUNNING_IN_IDE = true;
     }