[test] add test coverage report

.gitlab-ci.yml

@@ -24,6 +24,9 @@ test:
     # Build and Check r2ogs6
     - R CMD build . --no-build-vignettes --no-manual
     - R CMD check $(ls -1t *.tar.gz | head -n 1) --no-build-vignettes --no-manual
+  after_script:
+    - R -e 'covr::package_coverage(type = c("tests", "examples"), quiet = F)'
+  coverage: '/Coverage: \d+\.\d+\%/'
   cache:
     key: "$CI_COMMIT_REF_SLUG"
     untracked: true

DESCRIPTION

@@ -27,6 +27,7 @@ License: GPL-3
 Encoding: UTF-8
 LazyData: true
 Suggests: 
+    covr,
     testthat,
     knitr,
     devtools,