ianmcook commented on a change in pull request #9878: URL: https://github.com/apache/arrow/pull/9878#discussion_r607366547
########## File path: r/tests/testthat/test-dplyr-string-functions.R ########## @@ -0,0 +1,172 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +library(dplyr) +library(stringr) + +test_that("sub and gsub", { + df <- tibble(x = c("Foo", "bar")) + + for(fixed in c(TRUE, FALSE)) { + + expect_dplyr_equal( + input %>% + transmute(x = sub("Foo", "baz", x, fixed = fixed)) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = sub("^B.+", "baz", x, ignore.case = FALSE, fixed = fixed)) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = sub("Foo", "baz", x, ignore.case = FALSE, fixed = fixed)) %>% + collect(), + df + ) + + # the tests below all use ignore.case = TRUE + # but base::sub and base::gsub ignore ignore.case = TRUE with a warning when fixed = TRUE + # so we can't use expect_dplyr_equal() for the tests below + expect_equal( + df %>% + Table$create() %>% + transmute(x = sub("O", "u", x, ignore.case = TRUE, fixed = fixed)) %>% + collect(), + tibble(x = c("Fuo", "bar")) + ) + expect_equal( + df %>% + Table$create() %>% + transmute(x = gsub("o", "u", x, ignore.case = TRUE, fixed = fixed)) %>% + collect(), + tibble(x = c("Fuu", "bar")) + ) + expect_equal( + df %>% + Table$create() %>% + transmute(x = sub("^B.+", "baz", x, ignore.case = TRUE, fixed = fixed)) %>% + collect(), + if (fixed) tibble(x = c("Foo", "bar")) else tibble(x = c("Foo", "baz")) + ) + + } + +}) + +test_that("str_replace and str_replace_all", { + df <- tibble(x = c("Foo", "bar")) + + library(stringr) + + expect_dplyr_equal( + input %>% + transmute(x = str_replace_all(x, regex("^F"), "baz")) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = str_replace(x, regex("^f[A-Z]{2}", ignore_case = TRUE), "baz")) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = str_replace_all(x, fixed("o"), "u")) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = str_replace(x, fixed("O"), "u")) %>% + collect(), + df + ) + expect_dplyr_equal( + input %>% + transmute(x = str_replace(x, fixed("O", ignore_case = TRUE), "u")) %>% + collect(), + df + ) + +}) + +test_that("backreferences", { + df <- tibble(x = c("Foo", "bar")) + + expect_dplyr_equal( + input %>% + transmute(desc = sub( + "(?:https?|ftp)://([^/\r\n]+)(/[^\r\n]*)?", + "path `\\2` on server `\\1`", + url + ) + ) %>% + collect(), + tibble(url = "https://arrow.apache.org/docs/r/";) + ) + expect_dplyr_equal( + input %>% + transmute(x = str_replace(x, regex("^(\\w)o(.*)", ignore_case = TRUE), "\\1\\2p")) %>% + collect(), + df + ) +}) + +test_that("edge cases", { Review comment: One of them can't use `expect_dplyr_equal()` because it uses `ignore.case = TRUE, fixed = TRUE` which isn't supported in base R. I added a note to explain that, like the note above explaining the same. I'll switch the other example here to use `expect_dplyr_equal()`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
