diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
new file mode 100644
index 0000000..2c5bb50
--- /dev/null
+++ b/.github/workflows/test-coverage.yaml
@@ -0,0 +1,50 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: test-coverage
+
+jobs:
+  test-coverage:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::covr
+          needs: coverage
+
+      - name: Test coverage
+        run: |
+          covr::codecov(
+            quiet = FALSE,
+            clean = FALSE,
+            install_path = file.path(Sys.getenv("RUNNER_TEMP"), "package")
+          )
+        shell: Rscript {0}
+
+      - name: Show testthat output
+        if: always()
+        run: |
+          ## --------------------------------------------------------------------
+          find ${{ runner.temp }}/package -name 'testthat.Rout*' -exec cat '{}' \; || true
+        shell: bash
+
+      - name: Upload test results
+        if: failure()
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage-test-failures
+          path: ${{ runner.temp }}/package
diff --git a/man/geom_sf_rais.Rd b/man/geom_sf_rais.Rd
index 01233da..7cd77a8 100644
--- a/man/geom_sf_rais.Rd
+++ b/man/geom_sf_rais.Rd
@@ -71,6 +71,47 @@ requires an already spatialized dataset
 }
 \examples{
 \dontrun{
-print("Hello world!")
+# 1 one year
+
+data("fortaleza")
+data("rais_fortaleza")
+
+## get geometry data into dataframe
+rais_fortaleza <- rais_fortaleza \%>\%
+  left_join(fortaleza) \%>\%
+  sf::st_as_sf() \%>\%
+  filter(year == 2019)
+
+## 1.1 inheriting data from ggplot()
+rais_fortaleza \%>\%
+  ggplot() +
+  geom_sf_rais(n_jobs, var_name = "Jobs", geo_name = "Fortaleza", geo_level = "neighborhood") +
+  theme_void()
+
+## 1.2 passing data explicitly
+ggplot() +
+  geom_sf_rais(n_jobs, var_name = "Jobs", geo_name = "Fortaleza", geo_level = "neighborhood",
+               data = rais_fortaleza) +
+  theme_void()
+}
+
+\dontrun{
+# 2 two years (faceted)
+
+data("fortaleza")
+data("rais_fortaleza")
+
+## get geometry data into dataframe
+rais_fortaleza <- rais_fortaleza \%>\%
+  left_join(fortaleza) \%>\%
+  sf::st_as_sf()
+
+## plot
+ggplot() +
+  geom_sf(data = fortaleza, color = NA) +
+  geom_sf_rais(n_jobs, var_name = "Jobs", geo_name = "Fortaleza", geo_level = "neighborhood",
+               data = rais_fortaleza,
+               faceted = T, facet_var = year) +
+  theme_void()
 }
 }