TST/CLN: Test structure

[hongyeehh]

closes #177

[codecov]

Codecov Report

Merging #197 (49fe10a) into master (30cf4cf) will increase coverage by 2.49%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #197      +/-   ##
==========================================
+ Coverage   85.70%   88.19%   +2.49%     
==========================================
  Files          36       36              
  Lines        1483     1483              
  Branches      258      258              
==========================================
+ Hits         1271     1308      +37     
+ Misses        162      136      -26     
+ Partials       50       39      -11     

Impacted Files	Coverage Δ
trackintel/analysis/tracking_quality.py	98.79% <ø> (ø)
trackintel/core.py	100.00% <ø> (+33.33%)	⬆️
trackintel/geogr/distances.py	94.62% <ø> (ø)
trackintel/geogr/point_distances.py	100.00% <ø> (ø)
trackintel/io/dataset_reader.py	96.03% <ø> (ø)
trackintel/io/file.py	97.01% <ø> (ø)
trackintel/io/from_geopandas.py	90.00% <ø> (ø)
trackintel/io/postgis.py	13.59% <ø> (ø)
trackintel/model/locations.py	95.83% <ø> (ø)
trackintel/model/positionfixes.py	96.87% <ø> (ø)
... and 16 more

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