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defmodule ViewOffsetTest do
use CouchTestCase
@moduletag :view_offsets
@moduletag kind: :single_node
@moduledoc """
Tests about view offsets.
This is a port of the view_offsets.js javascript test suite.
"""
@docs [
%{"_id" => "a1", "letter" => "a", "number" => 1, "foo" => "bar"},
%{"_id" => "a2", "letter" => "a", "number" => 2, "foo" => "bar"},
%{"_id" => "a3", "letter" => "a", "number" => 3, "foo" => "bar"},
%{"_id" => "b1", "letter" => "b", "number" => 1, "foo" => "bar"},
%{"_id" => "b2", "letter" => "b", "number" => 2, "foo" => "bar"},
%{"_id" => "b3", "letter" => "b", "number" => 3, "foo" => "bar"},
%{"_id" => "b4", "letter" => "b", "number" => 4, "foo" => "bar"},
%{"_id" => "b5", "letter" => "b", "number" => 5, "foo" => "bar"},
%{"_id" => "c1", "letter" => "c", "number" => 1, "foo" => "bar"},
%{"_id" => "c2", "letter" => "c", "number" => 2, "foo" => "bar"}
]
@design_doc %{
"_id" => "_design/test",
"views" => %{
"offset" => %{
"map" => "function(doc) { emit([doc.letter, doc.number], doc); }"
}
}
}
@tag :with_db
test "basic view offsets", context do
db_name = context[:db_name]
save(db_name, @design_doc)
bulk_save(db_name, @docs)
[
[["c", 2], 0],
[["c", 1], 1],
[["b", 5], 2],
[["b", 4], 3],
[["b", 3], 4],
[["b", 2], 5],
[["b", 1], 6],
[["a", 3], 7],
[["a", 2], 8],
[["a", 1], 9]
]
|> Enum.each(fn [start_key, offset] ->
result =
view(db_name, "test/offset", %{
"startkey" => :jiffy.encode(start_key),
"descending" => true
})
assert result.body["offset"] === offset
end)
end
test "repeated view offsets" do
0..14 |> Enum.each(fn _ -> repeated_view_offset_test_fun end)
end
def repeated_view_offset_test_fun do
db_name = random_db_name()
create_db(db_name)
save(db_name, @design_doc)
bulk_save(db_name, @docs)
first_response =
view(db_name, "test/offset", %{
"startkey" => :jiffy.encode(["b", 4]),
"startkey_docid" => "b4",
"endkey" => :jiffy.encode(["b"]),
"descending" => true,
"limit" => 2,
"skip" => 1
})
second_response =
view(db_name, "test/offset", %{
"startkey" => :jiffy.encode(["c", 3])
})
third_response =
view(db_name, "test/offset", %{
"startkey" => :jiffy.encode(["b", 6]),
"endkey" => :jiffy.encode(["b", 7])
})
assert first_response.body["offset"] === 4
assert second_response.body["offset"] === length(@docs)
assert third_response.body["offset"] === 8
delete_db(db_name)
end
end
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