add more tests

ext/TestExt.jl

@@ -88,11 +88,15 @@ function TranscodingStreams.test_chunked_read(Encoder, Decoder)
         ok = true
         for chunk in chunks
             stream = TranscodingStream(Decoder(), buffer, stop_on_end=true)
-            ok &= hash(read(stream)) == hash(chunk)
+            ok &= read(stream) == chunk
             ok &= eof(stream)
             ok &= isreadable(stream)
             close(stream)
         end
+        # read without stop_on_end should read the full data.
+        stream = TranscodingStream(Decoder(), IOBuffer(data))
+        ok &= read(stream) == reduce(vcat, chunks)
+        close(stream)
         Test.@test ok
     end
     finalize(encoder)

test/codecnoop.jl

@@ -59,16 +59,18 @@
     data = collect(0x00:0x0f)
     stream = TranscodingStream(Noop(), IOBuffer(data))
     @test !ismarked(stream)
-    mark(stream)
+    @test mark(stream) == 0
     @test ismarked(stream)
     @test [read(stream, UInt8) for _ in 1:3] == data[1:3]
-    reset(stream)
+    @test reset(stream) == 0
+    @test_throws ArgumentError reset(stream)
     @test !ismarked(stream)
     @test [read(stream, UInt8) for _ in 1:3] == data[1:3]
-    mark(stream)
+    @test mark(stream) == 3
     @test ismarked(stream)
-    unmark(stream)
+    @test unmark(stream)
     @test !ismarked(stream)
+    @test !unmark(stream)
     close(stream)
 
     stream = TranscodingStream(Noop(), IOBuffer(b"foobarbaz"))