adj linter

.github/workflows/lint.yml

@@ -1,18 +1,30 @@
-name: Lint R Code
+name: R Lint
 
 on: [push, pull_request]
 
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout code
+        uses: actions/checkout@v3
+
       - name: Set up R
         uses: r-lib/actions/setup-r@v2
+
       - name: Install dependencies
         run: |
-          install.packages('lintr')
+          install.packages("lintr")
+          install.packages("testthat")
+
       - name: Run lintr
         run: |
           library(lintr)
-          lint_dir()
+          lint_dir(
+            linters = with_defaults(
+              line_length_linter = line_length_linter(80),
+              object_name_linter = object_name_linter(styles = c("snake_case", "camelCase")),
+              assignment_linter = assignment_linter(),
+              spaces_left_parentheses_linter = spaces_left_parentheses_linter()
+            )
+          )