Add test for compression format of tarball (#1396)

* Add test for compression format of tarball

* Bump requirement for BinaryBuilderBase

Author: giordano

Project.toml

@@ -36,7 +36,7 @@ ghr_jll = "07c12ed4-43bc-5495-8a2a-d5838ef8d533"
 [compat]
 ArgParse = "1.1"
 Binutils_jll = "2"
-BinaryBuilderBase = "1.39"
+BinaryBuilderBase = "1.39.1"
 Downloads = "1"
 GitHub = "5.1"
 HTTP = "0.8, 0.9, 1"

test/building.jl

@@ -1,3 +1,5 @@
+using BinaryBuilderBase: detect_compressor
+
 @testset "Building libfoo" begin
 	# Test building with both `make` and `cmake`, using directory and git repository
     for script in (libfoo_make_script, libfoo_cmake_script, libfoo_meson_script)
@@ -211,6 +213,12 @@ shards_to_test = expand_cxxstring_abis(expand_gfortran_versions(shards_to_test))
                 # Ensure the build products were created
                 @test isfile(tarball_path)
 
+                compressor = open(tarball_path) do io
+                    detect_compressor(read(io, 6))
+                end
+                # Make sure the compression format is what we expect
+                @test compressor == "xz"
+
                 # Unpack it somewhere else
                 @test verify(tarball_path, tarball_hash)
                 testdir = joinpath(build_path, "testdir")