# ------------------------------------------------------------------------------
# phop_vec

test_that("phop_vec() works", {
  expect_identical(phop_vec(list(1L, 1L), 1, 1, ~ .x + .y), 2L)
})

test_that("phop_vec() doesn't retains names of first input (#75)", {
  expect_named(phop_vec(list(c(x = 1L), c(y = 1L)), 1, 1, ~ .x + .y), NULL)
})

test_that("phop_vec() can simplify automatically", {
  expect_identical(phop_vec(list(1, 2), 1, 1, ~ .x + .y, .ptype = NULL), 3)
})

test_that("phop_vec() errors if it can't simplify", {
  fn <- function(x, y) {
    if (x == 1L) {
      1
    } else {
      "hi"
    }
  }
  expect_snapshot({
    (expect_error(
      phop_vec(list(1:2, 1:2), 1:2, 1:2, fn, .ptype = NULL),
      class = "vctrs_error_incompatible_type"
    ))
  })
})

# ------------------------------------------------------------------------------
# .ptype

test_that("`.ptype = NULL` validates that element lengths are 1", {
  expect_snapshot({
    (expect_error(
      phop_vec(
        list(1:2, 1:2),
        1:2,
        1:2,
        ~ if (.x == 1L) {
          1:2
        } else {
          1
        },
        .ptype = NULL
      )
    ))
    (expect_error(
      phop_vec(
        list(1:2, 1:2),
        1:2,
        1:2,
        ~ if (.x == 1L) {
          NULL
        } else {
          2
        },
        .ptype = NULL
      )
    ))
  })
})

test_that("`phop_vec()` falls back to `c()` method as required", {
  local_c_foobar()

  expect_identical(
    phop_vec(
      list(1:3, 1:3),
      1:3,
      1:3,
      ~ foobar(.x),
      .ptype = foobar(integer())
    ),
    foobar(1:3)
  )
  expect_condition(
    phop_vec(
      list(1:3, 1:3),
      1:3,
      1:3,
      ~ foobar(.x),
      .ptype = foobar(integer())
    ),
    class = "slider_c_foobar"
  )

  expect_identical(
    phop_vec(list(1:3, 1:3), 1:3, 1:3, ~ foobar(.x)),
    foobar(1:3)
  )
  expect_condition(
    phop_vec(list(1:3, 1:3), 1:3, 1:3, ~ foobar(.x)),
    class = "slider_c_foobar"
  )
})