use normalizePath() in find_package() (#1765)

* use normalizePath() in find_package()

fixes #1759

* allow undesirable_operator ::: in test-settings.R

* d'oh

* remove unnecessary testthat.R

* add back testthat.R without comments

Co-authored-by: Indrajeet Patil <patilindrajeet.science@gmail.com>

NEWS.md

@@ -13,6 +13,8 @@
 
 * `namespace_linter()` correctly recognizes backticked operators to be exported from respectives namespaces (like `` rlang::`%||%` ``) (#1752, @IndrajeetPatil)
 
+* `lint_package()` correctly finds a package from within a subdir if the `path` points to anywhere within the package (#1759, @AshesITR)
+
 ## Changes to defaults
 
 * Set the default for the `except` argument in `duplicate_argument_linter()` to `c("mutate", "transmute")`.

R/settings_utils.R

@@ -4,6 +4,7 @@ has_description <- function(path) {
 }
 
 find_package <- function(path) {
+  path <- normalizePath(path)
   depth <- 2L
   while (!has_description(path)) {
     path <- dirname(path)

tests/testthat/dummy_packages/assignmentLinter/DESCRIPTION

@@ -7,3 +7,6 @@ Author: Who wrote it
 Maintainer: Who to complain to <yourfault@somewhere.net>
 Description: More about what it does (maybe more than one line)
 License: What license is it under?
+Suggests: 
+    testthat (>= 3.0.0)
+Config/testthat/edition: 3

tests/testthat/dummy_packages/assignmentLinter/tests/testthat.R

@@ -0,0 +1,4 @@
+library(testthat)
+library(assignmentLinter)
+
+test_check("assignmentLinter")

tests/testthat/dummy_packages/assignmentLinter/tests/testthat/test-abc.R

@@ -0,0 +1,3 @@
+test_that("test abc", {
+  expect_equal(2 * 2, 4)
+})

tests/testthat/test-lint_package.R

@@ -91,7 +91,11 @@ test_that(
     )
     lints_from_a_subdir <- withr::with_dir(
       file.path(pkg_path, "R"),
-      lint_package("..", linters = list(assignment_linter()))
+      lint_package(".", linters = list(assignment_linter()))
+    )
+    lints_from_a_subsubdir <- withr::with_dir(
+      file.path(pkg_path, "tests", "testthat"),
+      lint_package(".", linters = list(assignment_linter()))
     )
 
     expect_identical(
@@ -114,6 +118,14 @@ test_that(
         "(.lintr config present)"
       )
     )
+    expect_identical(
+      as.data.frame(lints_from_outside),
+      as.data.frame(lints_from_a_subsubdir),
+      info = paste(
+        "lint_package() finds the same lints from a sub-subdir as from outside a pkg",
+        "(.lintr config present)"
+      )
+    )
   }
 )
 

tests/testthat/test-settings.R

@@ -1,3 +1,5 @@
+# nolint start: undesirable_operator.
+# This test file tests multiple internal lintr functions, so we need to allow lintr:::*
 test_that("it uses default settings if none provided", {
   lintr:::read_settings(NULL)
 
@@ -98,8 +100,8 @@ test_that("it has a smart default for encodings", {
   lintr:::read_settings(NULL)
   expect_identical(settings$encoding, "UTF-8")
 
-  proj_file <- test_path("dummy_projects", "project", "metropolis-hastings-rho.R")
-  pkg_file <- test_path("dummy_packages", "cp1252", "R", "metropolis-hastings-rho.R")
+  proj_file <- test_path("dummy_projects", "project", "cp1252.R")
+  pkg_file <- test_path("dummy_packages", "cp1252", "R", "cp1252.R")
 
   expect_identical(
     normalizePath(find_rproj_at(find_rproj_or_package(proj_file)), winslash = "/"),
@@ -119,3 +121,4 @@ test_that("it has a smart default for encodings", {
   lintr:::read_settings(pkg_file)
   expect_identical(settings$encoding, "ISO8859-1")
 })
+# nolint end