function test.index_name()

for _, k in ipairs(df.units_other_id) do

expect.eq(df.global.world.units.other[k]._kind, 'container')

end

end

function test.index_name_bad()

expect.error_match('not found.$', function()

expect.eq(df.global.world.units.other.SOME_FAKE_NAME, 'container')

end)

end

function test.index_id()

for i in ipairs(df.units_other_id) do

expect.eq(df.global.world.units.other[i]._kind, 'container', df.units_other_id[i])

end

end

function test.index_id_bad()

expect.error_match('Cannot read field', function()

expect.eq(df.global.world.units.other[df.units_other_id._first_item - 1], 'container')

end)

expect.error_match('Cannot read field', function()

expect.eq(df.global.world.units.other[df.units_other_id._last_item + 1], 'container')

end)

end