Add tests for the unsafe paging property

Signed-off-by: Andrew Berezovskyi <andriib@kth.se>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 ### Added
+
 - LyoStore: Providing a system property `OSLC4JUtils.hasLyoStorePagingPreciseLimit()` to allow the application to check whether query paging should return an exact number of elements in a paged query, or not (`OSLC4JConstants.LYO_STORE_PAGING_PRECISE_LIMIT`).
 
 
@@ -12,7 +13,7 @@
   - Jena renamed `RDFReader/RDFWriter` to `RDFReaderI/RDFWriterI`
 - LyoStore: Ordering resources by their subject IDs when doing a query to store. This ordering can be disabled with a call to `OSLC4JUtils.setLyoStorePagingUnsafe(true)`
 - LyoStore: `OSLC4JUtils.hasLyoStorePagingPreciseLimit()` will return true by default. Call `OSLC4JUtils.setLyoStorePagingPreciseLimit(false)` to restore the old behavior.
-
+- `oslc4j-json4j-provider` uses `wink-json4j` version 1.4 instead of 1.2.1-incubating.
 
 ### Deprecated
 
@@ -24,11 +25,11 @@
 - **`lyo-validation` temporarily removed from the build**
 - `oslc4j-wink` was removed
 - `oslc4j-registry` was removed
-- Store support for TDB1 and in-memory backends was removed. 
+- Store support for direct TDB1 backend was removed. You can still create a SPARQL query executor over an in-mem TDB1 dataset: `new DatasetQueryExecutorImpl(TDBFactory.createDataset())`.
 
 ### Fixed
 
-## 4.1.0
+## [4.1.0]
 
 ### Added
 

core/oslc4j-core/src/test/java/org/eclipse/lyo/oslc4j/core/OSLC4JUtilsTest.java

@@ -115,6 +115,30 @@ public void resolveServletUriWithoutPublicUri() {
         assertEquals("https://hostname.example.com:12357/myapp/resources", fullUri);
     }
 
+    @Test
+    public void storePagingSafeByDefault() {
+        System.clearProperty(OSLC4JConstants.LYO_STORE_PAGING_UNSAFE);
+        assertFalse(OSLC4JUtils.isLyoStorePagingUnsafe());
+    }
+
+    @Test
+    public void storePagingUnsafeSetViaProperty() {
+        System.clearProperty(OSLC4JConstants.LYO_STORE_PAGING_UNSAFE);
+        assertFalse(OSLC4JUtils.isLyoStorePagingUnsafe());
+
+        System.setProperty(OSLC4JConstants.LYO_STORE_PAGING_UNSAFE, "true");
+        assertTrue(OSLC4JUtils.isLyoStorePagingUnsafe());
+    }
+
+    @Test
+    public void storePagingUnsafeSetViaSetter() {
+        System.setProperty(OSLC4JConstants.LYO_STORE_PAGING_UNSAFE, "true");
+        assertTrue(OSLC4JUtils.isLyoStorePagingUnsafe());
+
+        OSLC4JUtils.setLyoStorePagingUnsafe(false);
+        assertFalse(OSLC4JUtils.isLyoStorePagingUnsafe());
+    }
+
     private HttpServletRequest mockRequest() {
         HttpServletRequest mockedRequest = Mockito.mock(HttpServletRequest.class);
         when(mockedRequest.getScheme()).thenReturn("https");