Add tests for Get/Set-SearchCatalog

[mawosoft]

• Add Get-SearchCatalog tests.
  • Use class types instead of interfaces in MockSearchManagerFactory.
  • Explicitly set ErrorActionPreference = Continue.
  • Simplify MockSearchManagerWithGetSetException.

[codecov-commenter]

Codecov Report

Merging #20 (4c52f8b) into master (f30d3de) will increase coverage by 4.82%. The diff coverage is 86.81%.

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@@            Coverage Diff             @@
##           master      #20      +/-   ##
==========================================
+ Coverage   65.03%   69.86%   +4.82%     
==========================================
  Files          44       45       +1     
  Lines        1885     2051     +166     
  Branches      233      245      +12     
==========================================
+ Hits         1226     1433     +207     
+ Misses        550      505      -45     
- Partials      109      113       +4     

Impacted Files	Coverage Δ
...sSearchManager.Tests/SearchManagerCommandsTests.cs	93.27% <76.47%> (-0.59%)	:arrow_down:
...sSearchManager.Tests/SearchCatalogCommandsTests.cs	87.50% <87.50%> (ø)
...hell.WindowsSearchManager.Tests/CommandTestBase.cs	100.00% <100.00%> (ø)
...owsSearchManager.Tests/mocks/MockInterfaceChain.cs	73.55% <100.00%> (+4.95%)	:arrow_up:
...rchManager.Tests/mocks/MockSearchManagerFactory.cs	85.71% <100.00%> (+14.28%)	:arrow_up:

... and 3 files with indirect coverage changes