Add more tests for #1 and fix #7

[shenxianpeng]

No description provided.

[codecov-commenter]

Codecov Report

Merging #8 (d9925bc) into main (3a23574) will increase coverage by 13.14%.
The diff coverage is 72.41%.

@@             Coverage Diff             @@
##             main       #8       +/-   ##
===========================================
+ Coverage   17.32%   30.46%   +13.14%     
===========================================
  Files           5        7        +2     
  Lines         127      151       +24     
===========================================
+ Hits           22       46       +24     
  Misses        105      105               

Impacted Files	Coverage Δ
clang_tools/install.py	0.00% <0.00%> (ø)
clang_tools/main.py	0.00% <0.00%> (ø)
clang_tools/util.py	0.00% <0.00%> (ø)
tests/test_main.py	90.00% <90.00%> (ø)
tests/test_install.py	94.44% <94.44%> (ø)
tests/test_util.py	100.00% <100.00%> (ø)

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication