library(oce)
test_that("multi-panel plots leave usr as it was originally", {
    orig <- par("usr")
    data(adp)
    expect_silent(plot(adp))
    expect_equal(par("usr"), orig)
    data(adv)
    expect_silent(plot(adv))
    expect_equal(par("usr"), orig)
    data(cm)
    expect_silent(plot(cm))
    expect_equal(par("usr"), orig)
    data(ctd)
    expect_silent(plot(ctd))
    expect_equal(par("usr"), orig)
    data(lisst)
    expect_silent(plot(lisst))
    expect_equal(par("usr"), orig)
    data(lobo)
    expect_warning(
        expect_warning(
            plot(lobo),
            "no good pressures"
        ),
        "no longitude"
    )
    expect_equal(par("usr"), orig)
    data(rsk)
    expect_silent(plot(rsk))
    expect_equal(par("usr"), orig)
    data(sealevel)
    expect_silent(plot(sealevel))
    expect_equal(par("usr"), orig)
    data(section)
    expect_silent(plot(section))
    expect_equal(par("usr"), orig)
})


test_that("oce.plot.ts() catches xlim errors", {
    t0 <- as.POSIXct("1967-07-04", tz = "UTC") # Canada's centenary
    t <- seq(t0, length.out = 24, by = "1 hour")
    y <- sin(as.numeric(t - t0) * 2 * pi / (12 * 3600))
    expect_silent(oce.plot.ts(t, y))
    xlim <- range(t)
    expect_silent(oce.plot.ts(t, y, xlim = xlim))
    expect_error(oce.plot.ts(t, y, xlim = rev(xlim)), "the elements of xlim must be in order")
    expect_error(oce.plot.ts(t, y, xlim = c(xlim[1], NA)), "missing value where TRUE/FALSE needed")
})