use data path check

src/test/java/gov/usgs/earthquake/nshmp/model/NshmTests.java

 package gov.usgs.earthquake.nshmp.model;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
@@ -120,7 +121,8 @@ class NshmTests {
    */
   @Test
   final void testAlaska2007() throws IOException {
-    NshmTestUtils.testNshm(NSHMS.get("nshm-alaska-2007"), getDataPath());
+    Nshm nshm = NSHMS.get("nshm-alaska-2007");
+    NshmTestUtils.testNshm(nshm, getDataPath(nshm));
   }
 
   /**
@@ -130,7 +132,8 @@ class NshmTests {
    */
   @Test
   final void testAlaska2023() throws IOException {
-    NshmTestUtils.testNshm(NSHMS.get("nshm-alaska-2023"), getDataPath());
+    Nshm nshm = NSHMS.get("nshm-alaska-2023");
+    NshmTestUtils.testNshm(nshm, getDataPath(nshm));
   }
 
   /**
@@ -140,7 +143,8 @@ class NshmTests {
    */
   @Test
   final void testConus2018() throws IOException {
-    NshmTestUtils.testNshm(NSHMS.get("nshm-conus-2018"), getDataPath());
+    Nshm nshm = NSHMS.get("nshm-conus-2018");
+    NshmTestUtils.testNshm(nshm, getDataPath(nshm));
   }
 
   /**
@@ -150,7 +154,8 @@ class NshmTests {
    */
   @Test
   final void testConus2023() throws IOException {
-    NshmTestUtils.testNshm(NSHMS.get("nshm-conus-2023"), getDataPath());
+    Nshm nshm = NSHMS.get("nshm-conus-2023");
+    NshmTestUtils.testNshm(nshm, getDataPath(nshm));
   }
 
   /**
@@ -160,10 +165,11 @@ class NshmTests {
    */
   @Test
   final void testHawaii2021() throws IOException {
-    NshmTestUtils.testNshm(NSHMS.get("nshm-hawaii-2021"), getDataPath());
+    Nshm nshm = NSHMS.get("nshm-hawaii-2021");
+    NshmTestUtils.testNshm(nshm, getDataPath(nshm));
   }
 
-  private static Optional<Path> getDataPath() {
-    return System.getenv("GITLAB_CI") != null ? Optional.of(DATA_PATH) : Optional.empty();
+  private static Optional<Path> getDataPath(Nshm nshm) {
+    return Files.exists(DATA_PATH.resolve(nshm.modelName())) ? Optional.of(DATA_PATH) : Optional.empty();
   }
 }