Load geolocation dataset memory-mapped in test to avoid large heap

Author: laurentpellegrino

build.gradle

@@ -107,14 +107,10 @@ check.dependsOn integrationTest
 
 test {
     useJUnitPlatform()
-    // The geolocation dataset test loads a full .mmdb into heap (LoadingMode.MEMORY),
-    // which exceeds the Gradle test worker's default heap.
-    maxHeapSize = '6g'
 }
 
 integrationTest {
     useJUnitPlatform()
-    maxHeapSize = '6g'
 }
 
 publishing {

src/test/java/co/ipregistry/datasets/IpregistryGeolocationDatasetTest.java

@@ -19,7 +19,9 @@ public void test() throws IOException {
                 "IPREGISTRY_DATASETS_SECRET_KEY environment variable not set");
 
         try (IpregistryGeolocationDataset dataset =
-                     IpregistryGeolocationDataset.builder(secretKey).build()) {
+                     IpregistryGeolocationDataset.builder(secretKey)
+                             .loadingMode(LoadingMode.MEMORY_MAPPED)
+                             .build()) {
 
             Assertions.assertTrue(
                     dataset.getBuildDate().isAfter(