yangxk1 commented on code in PR #824:
URL: https://github.com/apache/incubator-graphar/pull/824#discussion_r2680704924


##########
maven-projects/spark/graphar/src/test/scala/org/apache/graphar/BaseTestSuite.scala:
##########
@@ -29,10 +29,25 @@ abstract class BaseTestSuite extends AnyFunSuite with 
BeforeAndAfterAll {
   var spark: SparkSession = _
 
   override def beforeAll(): Unit = {
-    if (System.getenv("GAR_TEST_DATA") == null) {
-      throw new IllegalArgumentException("GAR_TEST_DATA is not set")
+    def resolveTestData(): String = {
+      Option(System.getenv("GAR_TEST_DATA"))
+        .orElse(Option(System.getProperty("gar.test.data")))
+        .getOrElse {
+          val candidates = Seq("../../testing", "../testing", "testing")
+          candidates
+            .map(p => new java.io.File(p).getAbsoluteFile)
+            .find(d =>
+              new java.io.File(d, "ldbc_sample/csv/ldbc_sample.graph.yml")
+                .exists()
+            )
+            .map(_.getAbsolutePath)
+            .getOrElse(
+              throw new IllegalArgumentException("GAR_TEST_DATA not found")
+            )
+        }
     }
-    testData = System.getenv("GAR_TEST_DATA")
+
+    testData = resolveTestData()

Review Comment:
   @shivendra-dev54  Please consider this comment, it  looks good



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