R Under development (unstable) (2024-01-31 r85845 ucrt) -- "Unsuffered Consequences"
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> library(reclin2)
Loading required package: data.table
> source("helpers.R")
> 
> message("Testing compare_vars()")
Testing compare_vars()
> 
> x <- data.table(foo = 1:3, bar = c("aa", "bb", "cc"))
> y <- data.table(foo = 3:4, bar = c("cc", "dd"))
> pairs <- pair(x, y)
> 
> tmp <- compare_vars(pairs, "foo")
> tmp2 <- x$foo[pairs$.x] == y$foo[pairs$.y]
> stopifnot(is.logical(tmp$foo))
> stopifnot(isTRUE(all.equal(as.logical(tmp$foo), tmp2)))
> 
> tmp <- copy(pairs)
> compare_vars(tmp, "foo", inplace = TRUE)
> tmp2 <- x$foo[pairs$.x] == y$foo[pairs$.y]
> stopifnot(is.logical(tmp$foo))
> stopifnot(isTRUE(all.equal(as.logical(tmp$foo), tmp2)))
> 
> tmp <- compare_vars(pairs, "fooc", "foo")
> tmp2 <- x$foo[pairs$.x] == y$foo[pairs$.y]
> stopifnot(is.logical(tmp$fooc))
> stopifnot(isTRUE(all.equal(as.logical(tmp$fooc), tmp2)))
> 
> tmp <- compare_vars(pairs, "fooc", "foo", "foo")
> tmp2 <- x$foo[pairs$.x] == y$foo[pairs$.y]
> stopifnot(is.logical(tmp$fooc))
> stopifnot(isTRUE(all.equal(as.logical(tmp$fooc), tmp2)))
> 
> 
> # Comparing on one variable generates two resulting comparison
> # vectors
> testfun <- function(a, b) {
+   data.table(
+     jw = cmp_jarowinkler()(a,b),
+     ja = cmp_jaccard()(a,b)
+   )
+ }
> tmp <- compare_vars(pairs, "foo", "bar", "bar", testfun)
> tmp2 <- 1*(x$bar[pairs$.x] == y$bar[pairs$.y])
> stopifnot(isTRUE(all.equal(tmp$foo_jw, tmp2)))
> stopifnot(isTRUE(all.equal(tmp$foo_ja, tmp2)))
> 
> 
> # Multiple variables are compared resulting in one comparison
> # vector
> testfun <- function(x, y) {
+   cmp <- cmp_identical()
+   c1 <- cmp(x[[1]], y[[1]]) + cmp(x[[2]], y[[2]])
+   c2 <- cmp(x[[1]], y[[2]]) + cmp(x[[2]], y[[1]])
+   pmax(c1, c2)
+ }
> tmp <- compare_vars(pairs, "foo", c("foo", "bar"), comparator = testfun)
> tmp2 <- (x$foo[pairs$.x] == y$foo[pairs$.y]) + 
+   (x$bar[pairs$.x] == y$bar[pairs$.y]) 
> stopifnot(is.numeric(tmp$foo))
> stopifnot(isTRUE(all.equal(as.numeric(tmp$foo), tmp2)))
> 
> # Pairs has zero records
> x <- data.table(foo = 1:3, bar = c("aa", "bb", "cc"))
> y <- data.table(foo = 3:4, bar = c("cc", "dd"))
> y <- y[FALSE,]
> pairs <- pair(x, y)
> tmp <- compare_vars(pairs, "foo")
> tmp2 <- x$foo[pairs$.x] == y$foo[pairs$.y]
> stopifnot(is.logical(tmp$foo))
> stopifnot(isTRUE(all.equal(as.logical(tmp$foo), tmp2)))
> 
> # Passing additional arguments on to the comparison function
> x <- data.table(foo = 1:3, bar = c("aa", "bb", "cc"))
> y <- data.table(foo = 3:4, bar = c("cc", "dd"))
> pairs <- pair(x, y)
> 
> testfun <- function(x, y, foo = 1) {
+   rep(foo, length(x))
+ }
> tmp <- compare_vars(pairs, "foo", comparator = testfun)
> expect_equal(tmp$foo, rep(1, 6), attributes = FALSE)
> tmp <- compare_vars(pairs, "foo", comparator = testfun, foo = 5)
> expect_equal(tmp$foo, rep(5, 6), attributes = FALSE)
> 
> message("Testing compare_vars() successful")
Testing compare_vars() successful
> 
> 
> 
> proc.time()
   user  system elapsed 
   0.43    0.12    0.54