Nothing
context("c.oin")
test_that(desc="class: oin",{
x <- as.oin("556000-4615")
y <- as.oin(c("556000-4615", "232100-0156", "802002-4280"))
xy <- c(x, y)
expect_is(xy, class = "oin")
expect_equal(as.character(xy), c("556000-4615", "556000-4615", "232100-0156", "802002-4280"))
})
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