make stream types a subtype of TranscodingStream

JuliaIO · Jun 11, 2017 · e89efb7 · e89efb7
1 parent bf591e8
commit e89efb7
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Showing 3 changed files with 5 additions and 2 deletions.
diff --git a/src/compression.jl b/src/compression.jl
@@ -29,7 +29,7 @@ function XzCompression(;level::Integer=DEFAULT_COMPRESSION_LEVEL, check::Cint=DE
     return XzCompression(LZMAStream(), level, check)
 end
 
-const XzCompressionStream{S} = TranscodingStream{XzCompression,S}
+const XzCompressionStream{S} = TranscodingStream{XzCompression,S} where S<:IO
 
 """
     XzCompressionStream(stream::IO; kwargs...)

diff --git a/src/decompression.jl b/src/decompression.jl
@@ -27,7 +27,7 @@ function XzDecompression(;memlimit::Integer=DEFAULT_MEM_LIMIT, flags::UInt32=LZM
     return XzDecompression(LZMAStream(), memlimit, flags)
 end
 
-const XzDecompressionStream{S} = TranscodingStream{XzDecompression,S}
+const XzDecompressionStream{S} = TranscodingStream{XzDecompression,S} where S<:IO
 
 """
     XzDecompressionStream(stream::IO; kwargs...)

diff --git a/test/runtests.jl b/test/runtests.jl
@@ -11,6 +11,9 @@ import TranscodingStreams
     data[[1,3,5]] = b"bug"
     @test_throws ErrorException read(XzDecompressionStream(IOBuffer(data)))
 
+    @test XzCompressionStream <: TranscodingStreams.TranscodingStream
+    @test XzDecompressionStream <: TranscodingStreams.TranscodingStream
+
     TranscodingStreams.test_roundtrip_read(XzCompressionStream, XzDecompressionStream)
     TranscodingStreams.test_roundtrip_write(XzCompressionStream, XzDecompressionStream)
     TranscodingStreams.test_roundtrip_lines(XzCompressionStream, XzDecompressionStream)