test_that("print method doesn't change unexpectedly", {
lf1 <- lazy_frame(x = 1, y = 2, .name = "lf1")
lf2 <- lazy_frame(x = 1, z = 2, .name = "lf2")
lf3 <- lazy_frame(x = 1, z = 2, .name = "lf3")
expect_snapshot(
left_join(lf1, lf2, by = "x") %>%
left_join(lf3, by = "x") %>%
sql_build()
)
})
test_that("generated sql doesn't change unexpectedly", {
lf <- lazy_frame(x = 1, y = 2)
expect_snapshot(inner_join(lf, lf))
expect_snapshot(left_join(lf, lf))
expect_snapshot(right_join(lf, lf))
expect_snapshot(full_join(lf, lf))
})
test_that("only disambiguates shared variables", {
lf1 <- lazy_frame(x = 1, y = 2)
lf2 <- lazy_frame(x = 1, z = 2)
expect_snapshot(left_join(lf1, lf2))
expect_snapshot(left_join(lf1, lf2, by = c("y" = "z")))
})
test_that("disambiguate variables that only differ in case", {
lf1 <- lazy_frame(x = 1, y = 2)
lf2 <- lazy_frame(X = 1, y = 2)
expect_snapshot(left_join(lf1, lf2, by = "y"))
})
test_that("sql_on query doesn't change unexpectedly", {
lf1 <- lazy_frame(x = 1, y = 2)
lf2 <- lazy_frame(x = 1, z = 3)
expect_snapshot(inner_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
expect_snapshot(left_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
expect_snapshot(right_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
expect_snapshot(full_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
expect_snapshot(semi_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
expect_snapshot(anti_join(lf1, lf2, sql_on = "LHS.y < RHS.z"))
})
test_that("sql_multi_join_vars generates expected SQL", {
con <- simulate_dbi()
# left_join(lf(x, a), lf(x, b), by = "x")
expect_equal(
sql_multi_join_vars(
con,
vars = tibble(
name = c("x", "a", "b"),
var = list("x", "a", "b"),
table = list(1L, 1L, 2L)
),
table_vars = list(left = c("x", "a"), right = c("x", "b"))
),
sql("`left`.*", b = "`b`")
)
# full_join(lf(x, a), lf(x, b), by = "x")
expect_equal(
sql_multi_join_vars(
con,
vars = tibble(
name = c("x", "a.x", "a.y", "b"),
table = list(c(1, 2), 1, 2, 2),
var = list(c("x", "x"), "a", "a", "b")
),
table_vars = list(left = c("x", "a"), right = c("x", "a", "b"))
),
sql(
x = "COALESCE(`left`.`x`, `right`.`x`)",
a.x = "`left`.`a`",
a.y = "`right`.`a`",
b = "`b`"
)
)
})
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