mapping tests to code lines

[sckott]

covr does not have the ability to produce this mapping. if desired, we'd need to build this ourselves. possibly like

test_file = "tests/testthat/test-geo_linestring.R"
x = covr::file_coverage("R/geo_linestring.R", test_file)
df = covr::tally_coverage(x)
df$test_file = basename(test_file)
# some lines below deleted for brevity
#>              filename       functions line value             test_file
#> 1  R/geo_linestring.R  geo_linestring   23     1 test-geo_linestring.R
#> 6  R/geo_linestring.R  geo_linestring   28     0 test-geo_linestring.R
#> 11 R/geo_linestring.R  geo_linestring   34     1 test-geo_linestring.R
#> 12 R/geo_linestring.R  geo_linestring   36     1 test-geo_linestring.R
#> 13 R/geo_linestring.R  geo_linestring   37     9 test-geo_linestring.R
#> 19 R/geo_linestring.R initial_bearing   49     9 test-geo_linestring.R
#> 21 R/geo_linestring.R initial_bearing   51     9 test-geo_linestring.R
#> 25 R/geo_linestring.R   final_bearing   58     9 test-geo_linestring.R
#> 26 R/geo_linestring.R   final_bearing   59     9 test-geo_linestring.R

then at least we can only run certain test files (e.g., test-geo_linestring.R) we know are testing lines in which a mutation is located

don't think there's any way to just run specific test_that blocks within test files, and probably not a good idea anyway since there could be setup stuff we miss

[sckott]

maëlle mentioned https://yonicd.github.io/covrpage/articles/get-started.html might have something useful