Add tests for Ancient provider for el_GR locale

src/test/java/net/datafaker/providers/base/AncientTest.java

@@ -1,16 +1,47 @@
 package net.datafaker.providers.base;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Nested;
+
 import java.util.List;
 import java.util.Collection;
+import java.util.Locale;
 
 class AncientTest extends BaseFakerTest<BaseFaker> {
 
     @Override
     protected Collection<TestSpec> providerListTest() {
         Ancient ancient = faker.ancient();
-        return List.of(TestSpec.of(ancient::god, "ancient.god"),
+        return getProviderListTests(ancient);
+    }
+
+    @Nested
+    class AncientInGreekTest extends BaseFakerTest<BaseFaker> {
+
+        @BeforeAll
+        void setup() {
+            this.setFaker(new BaseFaker(new Locale("el", "GR")));
+        }
+
+        @AfterAll
+        void reset() {
+            this.setFaker(this.getFaker());
+        }
+
+        @Override
+        protected Collection<TestSpec> providerListTest() {
+            Ancient ancient = faker.ancient();
+            return getProviderListTests(ancient);
+        }
+    }
+
+    private Collection<TestSpec> getProviderListTests(Ancient ancient) {
+        return List.of(
+            TestSpec.of(ancient::god, "ancient.god"),
             TestSpec.of(ancient::primordial, "ancient.primordial"),
             TestSpec.of(ancient::titan, "ancient.titan"),
-            TestSpec.of(ancient::hero, "ancient.hero"));
+            TestSpec.of(ancient::hero, "ancient.hero")
+        );
     }
 }