Adds unit test for canonicalization of resource names in getResource

- Adds .mxkeep file to create the necessary jar entry
- Bumps requires mx version to work with .mxkeep

Author: zakkak

substratevm/mx.substratevm/suite.py

@@ -1,6 +1,6 @@
 # pylint: disable=line-too-long
 suite = {
-    "mxversion": "5.316.15",
+    "mxversion": "5.319.0",
     "name": "substratevm",
     "version" : "22.1.0",
     "release" : False,

substratevm/src/com.oracle.svm.test/src/com/oracle/svm/test/NativeImageResourceFileSystemProviderTest.java

@@ -85,6 +85,7 @@ public void beforeAnalysis(BeforeAnalysisAccess access) {
             // Remove leading / for the resource patterns
             registry.addResources(ConfigurationCondition.alwaysTrue(), RESOURCE_FILE_1.substring(1));
             registry.addResources(ConfigurationCondition.alwaysTrue(), RESOURCE_FILE_2.substring(1));
+            registry.addResources(ConfigurationCondition.alwaysTrue(), RESOURCE_DIR.substring(1));
 
             /** Needed for {@link #testURLExternalFormEquivalence()} */
             for (Module module : ModuleLayer.boot().modules()) {
@@ -631,4 +632,22 @@ public void testURLExternalFormEquivalence() {
             Assert.fail("Contents of original URL and one created from originals ExternalForm must be the same: " + e);
         }
     }
+
+    @Test
+    public void noCanonicalizationInGetResource() {
+        Class<?> klass = NativeImageResourceFileSystemProviderTest.class;
+        URL url = klass.getResource(RESOURCE_DIR + "/");
+        Assert.assertNotNull(url);
+        Assert.assertTrue(url.toString().endsWith("/"));
+        url = klass.getResource(RESOURCE_DIR);
+        Assert.assertNotNull(url);
+        Assert.assertFalse(url.toString().endsWith("/"));
+        url = klass.getResource(RESOURCE_DIR + "/./");
+        Assert.assertNull(url);
+        url = klass.getResource(RESOURCE_FILE_1);
+        Assert.assertNotNull(url);
+        url = klass.getResource(RESOURCE_FILE_1 + "/");
+        Assert.assertNull(url);
+    }
+
 }

substratevm/src/com.oracle.svm.test/src/resources/.mxkeep

@@ -0,0 +1 @@
+This file instructs mx to create a jar entry for the parent directory