test_that("set operations use coercion rules (#799)", {
df1 <- tibble(x = 1:2, y = c(1, 1))
df2 <- tibble(x = 1:2, y = 1:2)
expect_equal(nrow(union(df1, df2)), 3L)
expect_equal(nrow(intersect(df1, df2)), 1L)
expect_equal(nrow(setdiff(df1, df2)), 1L)
df1 <- tibble(x = factor(letters[1:10]))
df2 <- tibble(x = letters[6:15])
res <- intersect(df1, df2)
expect_equal(res, tibble(x = letters[6:10]), ignore_attr = TRUE)
res <- intersect(df2, df1)
expect_equal(res, tibble(x = letters[6:10]), ignore_attr = TRUE)
res <- union(df1, df2)
expect_equal(res, tibble(x = letters[1:15]), ignore_attr = TRUE)
res <- union(df2, df1)
expect_equal(res, tibble(x = letters[c(6:15, 1:5)]), ignore_attr = TRUE)
res <- setdiff(df1, df2)
expect_equal(res, tibble(x = letters[1:5]), ignore_attr = TRUE)
res <- setdiff(df2, df1)
expect_equal(res, tibble(x = letters[11:15]), ignore_attr = TRUE)
})
test_that("setdiff handles factors with NA (#1526)", {
df1 <- tibble(x = factor(c(NA, "a")))
df2 <- tibble(x = factor("a"))
res <- setdiff(df1, df2)
expect_s3_class(res$x, "factor")
expect_equal(levels(res$x), "a")
expect_true(is.na(res$x[1]))
})
test_that("intersect does not unnecessarily coerce (#1722)", {
df <- tibble(a = 1L)
res <- intersect(df, df)
expect_type(res$a, "integer")
})
test_that("set operations reconstruct grouping metadata (#3587)", {
df1 <- tibble(x = 1:4, g = rep(1:2, each = 2)) %>% group_by(g)
df2 <- tibble(x = 3:6, g = rep(2:3, each = 2))
expect_equal(setdiff(df1, df2), filter(df1, x < 3))
expect_equal(intersect(df1, df2), filter(df1, x >= 3))
expect_equal(union(df1, df2), tibble(x = 1:6, g = rep(1:3, each = 2)) %>% group_by(g))
expect_equal(setdiff(df1, df2) %>% group_rows(), list_of(1:2))
expect_equal(intersect(df1, df2) %>% group_rows(), list_of(1:2))
expect_equal(union(df1, df2) %>% group_rows(), list_of(1:2, 3:4, 5:6))
})
test_that("set operations keep the ordering of the data (#3839)", {
rev_df <- function(df) {
df[rev(seq_len(nrow(df))), ]
}
df1 <- tibble(x = 1:4, g = rep(1:2, each = 2))
df2 <- tibble(x = 3:6, g = rep(2:3, each = 2))
expect_equal(setdiff(df1, df2), filter(df1, x < 3), ignore_attr = TRUE)
expect_equal(setdiff(rev_df(df1), df2), filter(rev_df(df1), x < 3), ignore_attr = TRUE)
expect_equal(intersect(df1, df2), filter(df1, x >= 3), ignore_attr = TRUE)
expect_equal(intersect(rev_df(df1), df2), filter(rev_df(df1), x >= 3), ignore_attr = TRUE)
expect_equal(union(df1, df2), tibble(x = 1:6, g = rep(1:3, each = 2)), ignore_attr = TRUE)
expect_equal(union(rev_df(df1), df2), tibble(x = c(4:1, 5:6), g = rep(c(2:1, 3L), each = 2)), ignore_attr = TRUE)
expect_equal(union(df1, rev_df(df2)), tibble(x = c(1:4, 6:5), g = rep(1:3, each = 2)), ignore_attr = TRUE)
})
test_that("set operations remove duplicates", {
df1 <- tibble(x = 1:4, g = rep(1:2, each = 2)) %>% bind_rows(., .)
df2 <- tibble(x = 3:6, g = rep(2:3, each = 2))
expect_equal(setdiff(df1, df2), filter(df1, x < 3) %>% distinct(), ignore_attr = TRUE)
expect_equal(intersect(df1, df2), filter(df1, x >= 3) %>% distinct(), ignore_attr = TRUE)
expect_equal(union(df1, df2), tibble(x = 1:6, g = rep(1:3, each = 2)), ignore_attr = TRUE)
})
test_that("set equality", {
df1 <- tibble(x = 1:4, g = rep(1:2, each = 2)) %>% group_by(g)
df2 <- tibble(x = 3:6, g = rep(2:3, each = 2))
expect_true(setequal(df1, df1))
expect_true(setequal(df2, df2))
expect_false(setequal(df1, df2))
expect_false(setequal(df2, df1))
})
test_that("set operations enforce empty ... (#5891)", {
a <- tibble(var = 1:3)
b <- tibble(var = 2:4)
c <- tibble(var = c(1, 3, 4, 5))
expect_error(intersect(a, b, c))
expect_error(setdiff(a, b, c))
expect_error(setequal(a, b, c))
expect_error(union(a, b, c))
expect_error(union_all(a, b, c))
})
# Errors ------------------------------------------------------------------
test_that("set operation give useful error message. #903", {
expect_snapshot({
alfa <- tibble(
land = c("Sverige", "Norway", "Danmark", "Island", "GB"),
data = rnorm(length(land))
)
beta <- tibble(
land = c("Norge", "Danmark", "Island", "Storbritannien"),
data2 = rnorm(length(land))
)
gamma <- tibble(land = 1:2, data = 1:2)
(expect_error(
intersect(alfa, beta)
))
(expect_error(
intersect(alfa, 1)
))
(expect_error(
intersect(alfa, gamma)
))
(expect_error(
union(alfa, beta)
))
(expect_error(
setdiff(alfa, beta)
))
})
})
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