test: guess_where_config() works with path changes

- path changes mean new dir and new filename so:
  - create a new dir for config
  - move config to that dir and rename

=> test correctly identifies changes (changing dir AND changing filename) in the yaml-config.

attribute to @ALanguillaume with some minor tweaks

Co-authored-by: ALanguillaume <[email protected]>

tests/testthat/test-config.R

@@ -76,3 +76,71 @@ test_that("config works", {
     )
   })
 })
+test_that("golem-config.yml can be moved to another location", {
+
+  path_dummy_golem <- tempfile(pattern = "dummygolem")
+
+  golem::create_golem(
+    path = path_dummy_golem,
+    open = FALSE
+  )
+
+  old_wd <- setwd(path_dummy_golem)
+  on.exit(setwd(old_wd))
+
+  # The good config path is returned
+  expect_equal(
+    golem:::guess_where_config(),
+    golem:::fs_path_abs(file.path(
+      path_dummy_golem,
+      "inst/golem-config.yml"
+    ))
+  )
+  # document_and_reload does not throw an error
+  expect_error(
+    document_and_reload(),
+    regexp = NA
+  )
+  expect_equal(
+    get_golem_name(),
+    basename(path_dummy_golem)
+  )
+  expect_equal(
+    get_golem_wd(),
+    path_dummy_golem
+  )
+
+  ## Move config file
+  dir.create(
+    "inst/config"
+  )
+  file.copy(
+    from = "inst/golem-config.yml",
+    to = "inst/config/golem.yml"
+  )
+  file.remove(
+    "inst/golem-config.yml"
+  )
+  # User adjusts the correct line in app_config.R:
+  tmp_app_config_r <- readLines("R/app_config.R")
+  tmp_app_config_r[36] <- "  file = app_sys(\"config/golem.yml\")"
+  writeLines(tmp_app_config_r, "R/app_config.R")
+
+  # The good config path is returned
+  expect_equal(
+    golem:::guess_where_config(),
+    golem:::fs_path_abs(file.path(
+      path_dummy_golem,
+      "inst/config/golem.yml"
+    ))
+  )
+  # document_and_reload does not throw an error
+  expect_error(
+    document_and_reload(),
+    regexp = NA
+  )
+  expect_equal(
+    get_golem_name(),
+    basename(path_dummy_golem)
+  )
+})