Tests for btree implementation used by range trees

[jwk404]

Signed-off-by: John Kennedy [email protected]

Motivation and Context

These are tests for the recently added btree implementation.

Description

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commit messages are properly formatted and contain Signed-off-by.

[codecov]

Codecov Report

Merging #9717 into master will increase coverage by <1%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #9717    +/-   ##
========================================
+ Coverage      79%      80%   +<1%     
========================================
  Files         385      385            
  Lines      121299   121299            
========================================
+ Hits        96407    96453    +46     
+ Misses      24892    24846    -46

Flag	Coverage Δ
#kernel	80% <ø> (ø)	⬆️
#user	67% <ø> (ø)	⬆️

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[jwk404]

Looking at the build failures and core dump.

[jwk404]

• use the TREE_CMP macro
• unconditionally enable ASSERTS
• added comments
• changes some types for compilation errors