test_that("melt_list works", {
library(data.table)
# data.frame
df <- data.frame(year = 2010, day = 1:3, month = 1, variable = "A")
l <- list(a = df, b = df, c = NULL)
expect_silent(df1 <- melt_list(l, "id"))
# data.table
dt <- data.table::data.table(year = 2010, day = 1:3, month = 1, site = "A")
df2 <- melt_list(list(a = dt, b = dt))
expect_true(is.data.table(df2))
expect_error({
l <- list(a = dt, b = df)
df2 <- melt_list(l, "id")
})
})
test_that("melt_tree works", {
d <- data.frame(year = 2010, day = 1:3, month = 1, variable = "A")
l <- list(list(x = d))
df <- melt_tree(l, c("a", "b"))
expect_equal(colnames(df)[1:2], c("a", "b"))
})
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