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+defmodule ViewCompactionTest do
+ use CouchTestCase
+
+ @moduledoc """
+ Test CouchDB View Compaction Behavior
+ This is a port of the view_compaction.js suite
+ """
+ @num_docs 1000
+
+ @ddoc %{
+ _id: "_design/foo",
+ language: "javascript",
+ views: %{
+ view1: %{
+ map: "function(doc) { emit(doc._id, doc.value) }"
+ },
+ view2: %{
+ map:
+ "function(doc) { if (typeof(doc.integer) === 'number') {emit(doc._id, doc.integer);} }",
+ reduce: "function(keys, values, rereduce) { return sum(values); }"
+ }
+ }
+ }
+
+ defp bulk_save_for_update(db_name, docs) do
+ resp = bulk_save(db_name, docs)
+ revs = resp.body
+
+ Enum.map(docs, fn m ->
+ rev = Enum.at(revs, String.to_integer(m["_id"]))["rev"]
+
+ m
+ |> Map.put("_rev", rev)
+ |> Map.update!("integer", &(&1 + 1))
+ end)
+ end
+
+ @tag :with_db
+ test "view compaction", context do
+ db_name = context[:db_name]
+ create_doc(db_name, @ddoc)
+
+ docs = make_docs(0..(@num_docs - 1))
+ docs = bulk_save_for_update(db_name, docs)
+
+ resp = view(db_name, "foo/view1")
+ assert length(resp.body["rows"]) == @num_docs
+
+ resp = view(db_name, "foo/view2")
+ assert length(resp.body["rows"]) == 1
+
+ resp = Couch.get("/#{db_name}/_design/foo/_info")
+ assert resp.body["view_index"]["update_seq"] == @num_docs + 1
+
+ docs = bulk_save_for_update(db_name, docs)
+
+ resp = view(db_name, "foo/view1")
+ assert length(resp.body["rows"]) == @num_docs
+
+ resp = view(db_name, "foo/view2")
+ assert length(resp.body["rows"]) == 1
+
+ resp = Couch.get("/#{db_name}/_design/foo/_info")
+ assert resp.body["view_index"]["update_seq"] == 2 * @num_docs + 1
+
+ bulk_save(db_name, docs)
+ resp = view(db_name, "foo/view1")
+ assert length(resp.body["rows"]) == @num_docs
+
+ resp = view(db_name, "foo/view2")
+ assert length(resp.body["rows"]) == 1
+
+ resp = Couch.get("/#{db_name}/_design/foo/_info")
+ assert resp.body["view_index"]["update_seq"] == 3 * @num_docs + 1
+
+ disk_size_before_compact = resp.body["view_index"]["sizes"]["file"]
+ data_size_before_compact = resp.body["view_index"]["sizes"]["active"]
+
+ assert is_integer(disk_size_before_compact)
+ assert data_size_before_compact < disk_size_before_compact
+
+ resp = Couch.post("/#{db_name}/_compact/foo")
+ assert resp.body["ok"] == true
+
+ retry_until(fn ->
+ resp = Couch.get("/#{db_name}/_design/foo/_info")
+ resp.body["view_index"]["compact_running"] == false
+ end)
+
+ resp = view(db_name, "foo/view1")
+ assert length(resp.body["rows"]) == @num_docs
+
+ resp = view(db_name, "foo/view2")
+ assert length(resp.body["rows"]) == 1
+
+ resp = Couch.get("/#{db_name}/_design/foo/_info")
+ assert resp.body["view_index"]["update_seq"] == 3 * @num_docs + 1
+
+ disk_size_after_compact = resp.body["view_index"]["sizes"]["file"]
+ data_size_after_compact = resp.body["view_index"]["sizes"]["active"]
+ assert disk_size_after_compact < disk_size_before_compact
+ assert is_integer(data_size_after_compact)
+ assert data_size_after_compact < disk_size_after_compact
+ end
+end