R Under development (unstable) (2024-01-31 r85845 ucrt) -- "Unsuffered Consequences"
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> 
> source("helpers.R")
> 
> library(reclin2)
Loading required package: data.table
> 
> 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))
> 
> pairs <- pair_minsim(x, y, on = c("b", "a"), minsim = 2)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(pairs$.x, c(3,4))
> expect_equal(pairs$.y, c(3,4))
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> pairs <- pair_minsim(x, y, on = c("a", "b"), minsim = 2, 
+   keep_simsum = FALSE, add_xy = FALSE)
> expect_equal(names(pairs), c(".x", ".y"))
> expect_equal(attr(pairs, "x"), NULL)
> expect_equal(attr(pairs, "y"), NULL)
> 
> pairs <- pair_minsim(x, y, on = c("b", "a"), minsim = 3)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(nrow(pairs), 0)
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> pairs <- pair_minsim(x, on = c("b", "a"), minsim = 1,
+   deduplication = TRUE)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(pairs$.x, c(1,1,2,3))
> expect_equal(pairs$.y, c(2,3,4,4))
> 
> # Regression test for issue #9: pairs are not generated when there are missing
> # values
> 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))
> x$a[1] <- NA
> pairs <- pair_minsim(x, y, on = c("b", "a"), minsim = 1)
> expect_equal(pairs$.x, c(1L, 1L, 2L, 2L, 3L, 3L, 3L, 4L, 4L, 4L))
> expect_equal(pairs$.y, c(1L, 3L, 2L, 4L, 1L, 3L, 4L, 2L, 3L, 4L))
> expect_equal(pairs$simsum, c(1, 1, 1, 1, 1, 2, 1, 1, 1, 2))
> 
> 
> # ===== ON_BLOCKING
> 
> 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))
> 
> pairs <- pair_minsim(x, y, on = "a", on_blocking = "b")
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(pairs$.x, c(1,1,3,3,2,2,4,4))
> expect_equal(pairs$.y, c(1,3,1,3,2,4,2,4))
> expect_equal(pairs$simsum, c(0,0,0,1,0,0,0,1))
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> # Unsing non-existent columns
> expect_error(pair_minsim(x, y, on = "a", on_blocking = "foo"))
> expect_error(pair_minsim(x, y, on = c("a", "foo"), on_blocking = "b"))
> 
> pairs <- pair_minsim(x, y, on = "a", on_blocking = "b", minsim = 1)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(pairs$.x, c(3,4))
> expect_equal(pairs$.y, c(3,4))
> expect_equal(pairs$simsum, c(1,1))
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> pairs <- pair_minsim(x, y, on = "a", on_blocking = "b", minsim = 2)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(nrow(pairs), 0)
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> # Missing values
> x <- data.table(a = c(1,NA,2,2), b = c(1,2,1,2))
> y <- data.table(a = c(3,3,2,2), b = c(1,2,NA,2))
> pairs <- pair_minsim(x, y, on = "a", on_blocking = "b", minsim = 1)
> expect_equal(names(pairs), c(".x", ".y", "simsum"))
> expect_equal(pairs$.x, c(4))
> expect_equal(pairs$.y, c(4))
> expect_equal(pairs$simsum, c(1))
> expect_equal(attr(pairs, "x"), x)
> expect_equal(attr(pairs, "y"), y)
> 
> 
> proc.time()
   user  system elapsed 
   0.62    0.12    0.73