IDisposable Pattern Cleanup and fix TestDictionary.TestResourceCleanup, #265

src/Lucene.Net.Analysis.Common/Analysis/Hunspell/Dictionary.cs

@@ -910,7 +910,8 @@ private void ReadDictionaryFiles(IList<Stream> dictionaries, Encoding decoder, B
             {
                 foreach (Stream dictionary in dictionaries)
                 {
-                    using var lines = new StreamReader(dictionary, decoder); // LUCENENET specific - CA2000: Use using pattern to ensure reader is disposed
+                    // LUCENENET specific - CA2000: Use using pattern to ensure reader is disposed, although we want to leave the dictionary stream open. See: TestDictionary.TestResourceCleanup
+                    using var lines = new StreamReader(dictionary, decoder, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true);
                     string line = lines.ReadLine(); // first line is number of entries (approximately, sometimes)
 
                     while ((line = lines.ReadLine()) != null)

src/Lucene.Net.TestFramework/Codecs/Lucene42/Lucene42DocValuesConsumer.cs

@@ -376,7 +376,7 @@ IEnumerator IEnumerable.GetEnumerator()
         }
 
         // per-document vint-encoded byte[]
-        internal class SortedSetEnumerator : IEnumerator<BytesRef>
+        internal sealed class SortedSetEnumerator : IEnumerator<BytesRef>
         {
             internal byte[] buffer = new byte[10];
             internal ByteArrayDataOutput @out = new ByteArrayDataOutput();
@@ -426,7 +426,7 @@ public bool MoveNext()
             object IEnumerator.Current => Current;
 
             // encodes count values to buffer
-            internal virtual void EncodeValues(int count)
+            internal void EncodeValues(int count)
             {
                 @out.Reset(buffer);
                 long lastOrd = 0;
@@ -450,4 +450,4 @@ public void Dispose()
         }
     }
 #pragma warning restore 612, 618
-}
+}

src/Lucene.Net.Tests.Analysis.Common/Analysis/Hunspell/TestDictionary.cs

@@ -156,25 +156,18 @@ public override long Position
                 set => @delegate.Position = value;
             }
 
-            public CloseCheckInputStream(TestDictionary outerInstance, System.IO.Stream @delegate) 
+            public CloseCheckInputStream(TestDictionary outerInstance, System.IO.Stream @delegate)
             {
                 this.@delegate = @delegate;
                 this.outerInstance = outerInstance;
             }
 
             protected override void Dispose(bool disposing)
             {
+                disposed = true;
                 @delegate.Dispose();
             }
 
-
-            new public void Dispose()
-            {
-                this.disposed = true;
-                base.Dispose();
-            }
-
-
             public virtual bool Disposed => this.disposed;
 
             public override void Flush()
@@ -209,7 +202,7 @@ public virtual void TestResourceCleanup()
             CloseCheckInputStream affixStream = new CloseCheckInputStream(this, this.GetType().getResourceAsStream("compressed.aff"));
             CloseCheckInputStream dictStream = new CloseCheckInputStream(this, this.GetType().getResourceAsStream("compressed.dic"));
 
-            new Dictionary(affixStream, dictStream);
+            _ = new Dictionary(affixStream, dictStream);
 
             assertFalse(affixStream.Disposed);
             assertFalse(dictStream.Disposed);
@@ -289,4 +282,4 @@ public virtual void TestFlagWithCrazyWhitespace()
             assertNotNull(Dictionary.GetFlagParsingStrategy("FLAG    UTF-8"));
         }
     }
-}
+}