test: add test case PsiResourceTest

[tangcent]

No description provided.

[codecov-commenter]

Codecov Report

Merging #526 (9f8ef31) into master (4dd52ac) will increase coverage by 0.066%.
The diff coverage is 16.667%.

@@               Coverage Diff               @@
##              master      #526       +/-   ##
===============================================
+ Coverage     39.530%   39.596%   +0.066%     
- Complexity      1489      1492        +3     
===============================================
  Files            197       197               
  Lines          11485     11491        +6     
  Branches        2577      2580        +3     
===============================================
+ Hits            4540      4550       +10     
+ Misses          5959      5956        -3     
+ Partials         986       985        -1     

Flag	Coverage Δ
unittests	39.596% <16.667%> (+0.066%)	⬆️

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Impacted Files	Coverage Δ
...kotlin/com/itangcent/idea/psi/PsiMethodResource.kt	53.846% <ø> (ø)
.../kotlin/com/itangcent/idea/psi/PsiClassResource.kt	44.444% <16.667%> (-22.222%)	⬇️
.../main/kotlin/com/itangcent/idea/psi/PsiResource.kt	85.714% <0.000%> (+57.143%)	⬆️

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