Pass dots

NEWS.md

@@ -1,5 +1,7 @@
 # dupree (development version)
 
+* Pass print(dups, ...) dots to print(tibble, ...) so that the number of output lines can be
+  specified in the output (thanks @mikemahoney218)
 * Update the CI workflows for pkgdown, test-coverage and R CMD check
 * use lintr >= 3, and update .lintr config file
 * Fixed linting across package

R/dups-class.R

@@ -47,7 +47,7 @@ tibble::as_tibble
 
 # nocov start
 print.dups <- function(x, ...) {
-  print(as_tibble(x))
+  print(as_tibble(x), ...)
   invisible(x)
 }
 # nocov end

tests/testthat/helper.R

@@ -31,8 +31,10 @@ expect_equivalent_tbl <- function(object, expected, ..., info = NULL) {
   )
 }
 
-get_empty_dups_tbl <- function() {
-  tibble::tibble(
+get_dups_tbl <- function(
+  ...
+) {
+  empty_tbl <- tibble::tibble(
     file_a = character(0),
     file_b = character(0),
     block_a = integer(0),
@@ -41,10 +43,24 @@ get_empty_dups_tbl <- function() {
     line_b = integer(0),
     score = numeric(0)
   )
+
+  user_tbl <- tibble::tibble(...)
+
+  common_cols <- intersect(colnames(user_tbl), colnames(empty_tbl))
+
+  if (length(common_cols) == 0) {
+    return(dplyr::cross_join(user_tbl, empty_tbl))
+  }
+
+  dplyr::left_join(
+    user_tbl,
+    empty_tbl,
+    by = common_cols
+  )
 }
 
 get_empty_dups_df <- function() {
-  as.data.frame(get_empty_dups_tbl(), stringsAsFactors = FALSE)
+  as.data.frame(get_dups_tbl(), stringsAsFactors = FALSE)
 }
 
 ###############################################################################

tests/testthat/test-dups-class.R

@@ -15,7 +15,7 @@ test_that("`dups` object can be converted to `data.frame`", {
     info = "dups -> dups conversion is an identity map"
   )
 
-  y <- get_empty_dups_tbl()
+  y <- get_dups_tbl()
   dups <- as_dups(y)
 
   expect_equal(
@@ -28,3 +28,20 @@ test_that("`dups` object can be converted to `data.frame`", {
 test_that("non dups/data-frames can't be converted to dups", {
   expect_error(as_dups("NOT A data.frame or dups object"))
 })
+
+describe("printing a 'dups' object", {
+  dups <- as_dups(get_dups_tbl(file_a = paste0(letters, ".R")))
+
+  it("includes the first line in the output", {
+    expect_output(print(dups), regexp = "a\\.R")
+  })
+
+  it("respects print(tibble, n = ...)", {
+    # "z.R" is on the last line of the table, it shouldn't be visible by default
+    # because `print(tibble)` shows the first 10 lines for large tables
+    expect_output(print(dups), regexp = "[^z].\\R")
+    # But when 26 lines of the table are printed, then the file "z.R" should be
+    # seen
+    expect_output(print(dups, n = 26), regexp = "z\\.R")
+  })
+})