context("Cube residual helpers")

test_that("broadcast broadcasts a vector", {
    expect_equal(
        broadcast(c(1, 2, 3), ncol = 2),
        array(c(1, 2, 3, 1, 2, 3), dim = c(3, 2))
    )
    expect_equal(
        broadcast(c(1, 2, 3), nrow = 2),
        array(c(1, 1, 2, 2, 3, 3), dim = c(2, 3))
    )

    expect_equal(
        broadcast(c(1, 2, 3), dims = c(3, 2)),
        array(c(1, 2, 3, 1, 2, 3), dim = c(3, 2))
    )
    expect_equal(
        broadcast(c(1, 2, 3), dims = c(2, 3)),
        array(c(1, 1, 2, 2, 3, 3), dim = c(2, 3))
    )
})

test_that("broadcast returns a matrix that mataches", {
    array <- array(c(1, 2, 3, 1, 2, 3), dim = c(3, 2))
    expect_equal(broadcast(array, dims = c(3, 2)), array)
    expect_error(broadcast(array, dims = c(2, 3)),
        paste0(
            "Something has gone wrong broadcasting the vector ",
            dQuote("array"), " to the dimensions c(2, 3)"
        ),
        fixed = TRUE
    )
})