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defmodule ViewErrorsTest do
use CouchTestCase
@moduletag kind: :single_node
@document %{integer: 1, string: "1", array: [1, 2, 3]}
@tag :with_db
test "emit undefined key results as null", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
map_fun = """
function(doc) {
emit(doc.undef, null);
}
"""
# emitting a key value that is undefined should result in that row
# being included in the view results as null
results = query(db_name, map_fun)
assert results["total_rows"] == 1
assert Enum.at(results["rows"], 0)["key"] == :null
end
@tag :with_db
test "exception in map function", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
map_fun = """
function(doc) {
doc.undef(); // throws an error
}
"""
# if a view function throws an exception, its results are not included in
# the view index, but the view does not itself raise an error
results = query(db_name, map_fun)
assert results["total_rows"] == 0
end
@tag :with_db
test "emit undefined value results as null", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
map_fun = """
function(doc) {
emit([doc._id, doc.undef], null);
}
"""
# if a view function includes an undefined value in the emitted key or
# value, it is treated as null
results = query(db_name, map_fun)
assert results["total_rows"] == 1
key =
results["rows"]
|> Enum.at(0)
|> Map.get("key")
|> Enum.at(1)
assert key == :null
end
@tag :with_db
test "query view with invalid params", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
body = %{
language: "javascript",
map: "function(doc){emit(doc.integer)}"
}
# querying a view with invalid params should give a resonable error message
resp =
Couch.post("/#{db_name}/_all_docs?startkey=foo",
headers: ["Content-Type": "application/json"],
body: body
)
assert resp.body["error"] == "bad_request"
resp =
Couch.post("/#{db_name}/_all_docs",
headers: ["Content-Type": "application/x-www-form-urlencoded"],
body: body
)
assert resp.status_code == 415
end
@tag :with_db
test "query parse error", context do
db_name = context[:db_name]
map_fun = """
function(doc) {
emit(doc.integer, doc.integer);
}
"""
ddoc_name = create_view(db_name, map_fun)
resp = Couch.get("/#{db_name}/#{ddoc_name}/_view/view", query: [group: true])
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
map_fun = "function() {emit(null, null)}"
ddoc_name = create_view(db_name, map_fun)
resp =
Couch.get("/#{db_name}/#{ddoc_name}/_view/view", query: [startkey: 2, endkey: 1])
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
assert String.contains?(resp.body["reason"], "No rows can match")
design_doc = %{
_id: "_design/test",
language: "javascript",
views: %{
no_reduce: %{map: "function(doc) {emit(doc._id, null);}"},
with_reduce: %{
map: "function (doc) {emit(doc.integer, doc.integer)};",
reduce: "function (keys, values) { return sum(values); };"
}
}
}
{:ok, _} = create_doc(db_name, design_doc)
resp = Couch.get("/#{db_name}/_design/test/_view/no_reduce", query: [group: true])
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
resp = Couch.get("/#{db_name}/_design/test/_view/no_reduce", query: [group_level: 1])
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
resp = Couch.get("/#{db_name}/_design/test/_view/no_reduce", query: [reduce: true])
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
resp = Couch.get("/#{db_name}/_design/test/_view/no_reduce", query: [reduce: false])
assert resp.status_code == 200
resp =
Couch.get("/#{db_name}/_design/test/_view/with_reduce",
query: [group: true, reduce: false]
)
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
resp =
Couch.get("/#{db_name}/_design/test/_view/with_reduce",
query: [group_level: 1, reduce: false]
)
assert resp.status_code == 400
assert resp.body["error"] == "query_parse_error"
end
@tag :with_db
test "infinite loop", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
design_doc3 = %{
_id: "_design/infinite",
language: "javascript",
views: %{
infinite_loop: %{
map: "function(doc) {while(true){emit(doc,doc);}};"
}
}
}
{:ok, _} = create_doc(db_name, design_doc3)
resp = Couch.get("/#{db_name}/_design/infinite/_view/infinite_loop")
assert resp.status_code == 500
# This test has two different races. The first is whether
# the while loop exhausts the JavaScript RAM limits before
# timing. The second is a race between which of two timeouts
# fires first. The first timeout is the couch_os_process
# waiting for data back from couchjs. The second is the
# gen_server call to couch_os_process.
assert resp.body["error"] == "os_process_error" or resp.body["error"] == "timeout"
end
@tag :with_db
test "error responses for invalid multi-get bodies", context do
db_name = context[:db_name]
design_doc = %{
_id: "_design/test",
language: "javascript",
views: %{
no_reduce: %{map: "function(doc) {emit(doc._id, null);}"},
with_reduce: %{
map: "function (doc) {emit(doc.integer, doc.integer)};",
reduce: "function (keys, values) { return sum(values); };"
}
}
}
{:ok, _} = create_doc(db_name, design_doc)
resp =
Couch.post("/#{db_name}/_design/test/_view/no_reduce",
body: "[]"
)
assert resp.status_code == 400
assert resp.body["error"] == "bad_request"
assert resp.body["reason"] == "Request body must be a JSON object"
resp =
Couch.post("/#{db_name}/_design/test/_view/no_reduce",
body: %{keys: 1}
)
assert resp.status_code == 400
assert resp.body["error"] == "bad_request"
assert resp.body["reason"] == "`keys` member must be an array."
end
@tag :with_db
test "reduce overflow error", context do
db_name = context[:db_name]
{:ok, _} = create_doc(db_name, @document)
design_doc2 = %{
_id: "_design/testbig",
language: "javascript",
views: %{
reduce_too_big: %{
map: "function (doc) {emit(doc.integer, doc.integer)};",
reduce:
"function (keys, values) { var chars = []; for (var i=0; i < 1000; i++) {chars.push('wazzap');};return chars; };"
}
}
}
{:ok, _} = create_doc(db_name, design_doc2)
resp = Couch.get("/#{db_name}/_design/testbig/_view/reduce_too_big")
assert resp.status_code == 200
# if the reduce grows to fast, throw an overflow error
assert Enum.at(resp.body["rows"], 0)["error"] == "reduce_overflow_error"
end
@tag :with_db
test "temporary view should give error message", context do
db_name = context[:db_name]
resp =
Couch.post("/#{db_name}/_temp_view",
headers: ["Content-Type": "application/json"],
body: %{
language: "javascript",
map: "function(doc){emit(doc.integer)}"
}
)
assert resp.status_code == 410
assert resp.body["error"] == "gone"
assert resp.body["reason"] == "Temporary views are not supported in CouchDB"
end
defp create_view(db_name, map_fun) do
ddoc_name = "_design/temp_#{System.unique_integer([:positive])}"
ddoc = %{
_id: ddoc_name,
language: "javascript",
views: %{
view: %{map: map_fun}
}
}
{:ok, _} = create_doc(db_name, ddoc)
ddoc_name
end
end
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