R Under development (unstable) (2023-07-19 r84711 ucrt) -- "Unsuffered Consequences"
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> 
> expect_equal <- function(x, y) {
+   stopifnot(isTRUE(all.equal(x, y)))
+ }
> 
> expect_equal_pairs <- function(x, y) {
+   setkey(pairs_ref, .x, .y)
+   setkey(pairs_loc, .x, .y)
+   expect_equal(pairs_ref$.x, pairs_loc$.x)
+   expect_equal(pairs_ref$.y, pairs_loc$.y)
+ }
> 
> library(reclin2)
Loading required package: data.table

Attaching package: 'reclin2'

The following object is masked from 'package:base':

    identical

> library(parallel)
> 
> x <- data.table(a = c(1,1,2,2), b = c(1,2,1,2))
> y <- data.table(a = c(3,3,2,2), b = c(1,2,1,2))
> 
> 
> cl <- makeCluster(2)
> 
> set.seed(103)
> pairs <- cluster_pair_blocking(cl, x, y, on = "a")
> pairs_ref <- pair_blocking(x, y, on = "a")
> pairs_loc <- cluster_collect(pairs)
> pairs_ref <- compare_pairs(pairs_ref, c("a", "b"))
> pairs_loc <- compare_pairs(pairs_loc, c("a", "b"))
> expect_equal_pairs(pairs_ref, pairs_loc)
> # The compare_pairs was added to fix a bug where the x after 
> # cluster_colled was not longer in the correct order; issue #2
> 
> set.seed(103)
> pairs <- cluster_pair_blocking(cl, x, on = "a", deduplication = TRUE)
> pairs_ref <- pair_blocking(x, on = "a", deduplication = TRUE)
> pairs_loc <- cluster_collect(pairs)
> pairs_ref <- compare_pairs(pairs_ref, c("a", "b"))
> pairs_loc <- compare_pairs(pairs_loc, c("a", "b"))
> expect_equal_pairs(pairs_ref, pairs_loc)
> 
> stopCluster(cl)
> 
> 
> proc.time()
   user  system elapsed 
   0.25    0.14    0.78