fix:added additional exception test

Signed-off-by: Matt Peterson <[email protected]>

server/src/test/java/com/hedera/block/server/persistence/storage/BlockAsDirectoryTest.java

@@ -149,42 +149,78 @@ public void testRemoveBlockWritePerms() throws IOException {
         // Change the permissions on the block node root directory
         removeBlockWritePerms(testConfig);
         BlockWriter<BlockItem> blockWriter = new BlockAsDirWriter(JUNIT, testConfig);
+
+        // The first BlockItem contains a header which will create a new block directory.
+        // This will fail here due to the lack of write permissions.  Detect the exception
+        // thrown.
         assertThrows(AccessDeniedException.class, () -> blockWriter.write(blockItems.get(0)));
     }
 
+    @Test
+    public void testRemoveBlockItemWritePerms() throws IOException {
+
+        final List<BlockItem> blockItems = PersistTestUtils.generateBlockItems(1);
+        final BlockWriter<BlockItem> blockWriter = new BlockAsDirWriter(JUNIT, testConfig);
+
+        // Writing the header BlockItem will create the block directory.
+        blockWriter.write(blockItems.get(0));
+
+        // Change the permissions on the block node root directory
+        removeBlockWritePerms(1, testConfig);
+
+        // Here, BlockItem writes won't throw an exception.
+        // We will rely on a different process to detect the invalid
+        // block and replace it.
+        for (int i = 2; i < blockItems.size(); i++) {
+            blockWriter.write(blockItems.get(1));
+        }
+
+        // Verify only the header block is on the file system
+        final BlockReader<Block> blockReader = new BlockAsDirReader(JUNIT, testConfig);
+        Optional<Block> blockOpt = blockReader.read(1);
+        assertFalse(blockOpt.isEmpty());
+
+        for (int i = 2; i < blockItems.size(); i++) {
+            blockOpt = blockReader.read(i);
+            assertTrue(blockOpt.isEmpty());
+        }
+    }
+
     @Test
     public void testConstructorWithInvalidPath() {
-        Map<String, String> testProperties = Map.of(JUNIT, "invalid-path");
-        ConfigSource testConfigSource = MapConfigSource.builder().map(testProperties).build();
-        Config testConfig = Config.builder(testConfigSource).build();
+        final Map<String, String> testProperties = Map.of(JUNIT, "invalid-path");
+        final ConfigSource testConfigSource = MapConfigSource.builder().map(testProperties).build();
+        final Config testConfig = Config.builder(testConfigSource).build();
         assertThrows(IllegalArgumentException.class, () -> new BlockAsDirWriter(JUNIT, testConfig));
     }
 
-    private void removeBlockReadPerms(int blockNumber, Config config) throws IOException {
-
+    private void removeBlockReadPerms(int blockNumber, final Config config) throws IOException {
         final Path blockNodeRootPath = Path.of(config.get(JUNIT).asString().get());
         final Path blockPath = blockNodeRootPath.resolve(String.valueOf(blockNumber));
-
-        Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_READ);
+        final Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_READ);
         Files.setPosixFilePermissions(blockPath, perms);
     }
 
-    private void removeBlockWritePerms(Config config) throws IOException {
-
+    private void removeBlockWritePerms(final Config config) throws IOException {
         final Path blockNodeRootPath = Path.of(config.get(JUNIT).asString().get());
-
-        Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_WRITE);
+        final Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_WRITE);
         Files.setPosixFilePermissions(blockNodeRootPath, perms);
     }
 
-    private void removeBlockItemReadPerms(int blockNumber, int blockItem, Config config)
+    private void removeBlockWritePerms(final int blockNumber, final Config config)
             throws IOException {
+        final Path blockNodeRootPath = Path.of(config.get(JUNIT).asString().get());
+        final Path blockPath = blockNodeRootPath.resolve(String.valueOf(blockNumber));
+        final Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_WRITE);
+        Files.setPosixFilePermissions(blockPath, perms);
+    }
 
+    private void removeBlockItemReadPerms(int blockNumber, int blockItem, Config config)
+            throws IOException {
         final Path blockNodeRootPath = Path.of(config.get(JUNIT).asString().get());
         final Path blockPath = blockNodeRootPath.resolve(String.valueOf(blockNumber));
         final Path blockItemPath = blockPath.resolve(blockItem + BLOCK_FILE_EXTENSION);
-
-        Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_READ);
+        final Set<PosixFilePermission> perms = PosixFilePermissions.fromString(NO_READ);
         Files.setPosixFilePermissions(blockItemPath, perms);
     }
 }