More tests for CUSPARSE

[kshyatt]

Porting https://github.com/JuliaGPU/CuArrays.jl/pull/726/files

[codecov]

Codecov Report

Merging #189 into master will increase coverage by 0.50%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #189      +/-   ##
==========================================
+ Coverage   81.17%   81.68%   +0.50%     
==========================================
  Files         142      142              
  Lines        9160     9225      +65     
==========================================
+ Hits         7436     7535      +99     
+ Misses       1724     1690      -34     

Impacted Files	Coverage Δ
test/cusparse.jl	100.00% <100.00%> (ø)
lib/cusparse/wrappers.jl	91.97% <0.00%> (+2.17%)	⬆️
test/runtests.jl	61.53% <0.00%> (+11.18%)	⬆️

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