Goメモ-241 (go testの結果をjson形式で出力)(go test -json, jq)

概要
参考情報

概要

いつも忘れるので、以下自分用のメモです。

たまに、go test の結果をプログラム側からいじりたいので json形式で欲しいときがあります。

go test には、-json フラグがあるので、それを指定すると結果が JSON で取得できます。

(昔は、go tool test2json ってコマンドでやっていた記憶がありますが、現在は -json があるので、test2json を直接呼ぶことは無いですね）

たとえば、こんな感じになります。

gitpod /workspace/gomy (master) $ go test -json ./ctxs
{"Time":"2022-08-16T10:27:03.469961409Z","Action":"run","Package":"github.com/devlights/gomy/ctxs","Test":"TestWhenAll"}
{"Time":"2022-08-16T10:27:03.470091149Z","Action":"output","Package":"github.com/devlights/gomy/ctxs","Test":"TestWhenAll","Output":"=== RUN   TestWhenAll\n"}
{"Time":"2022-08-16T10:27:03.470107069Z","Action":"run","Package":"github.com/devlights/gomy/ctxs","Test":"TestWhenAll/100,200,300"}
{"Time":"2022-08-16T10:27:03.470160369Z","Action":"output","Package":"github.com/devlights/gomy/ctxs","Test":"TestWhenAll/100,200,300","Output":"=== RUN   TestWhenAll/100,200,300\n"}
・
・
割愛

このままだと見づらいので、基本は jq とか使って見やすくしますね。

gitpod /workspace/gomy (master) $ go test -json ./ctxs | jq .
{
  "Time": "2022-08-16T10:28:17.512617308Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll"
}
{
  "Time": "2022-08-16T10:28:17.512683788Z",
  "Action": "output",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll",
  "Output": "=== RUN   TestWhenAll\n"
}
{
  "Time": "2022-08-16T10:28:17.512690738Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll/100,200,300"
}
・
・
割愛

フィールドの内容については、ヘルプに記載されています。

pkg.go.dev

欲しいのが run だけだったら、以下のようにします。

gitpod /workspace/gomy (master) $ go test -json ./ctxs | jq 'select( .Action == "run" )'
{
  "Time": "2022-08-16T10:30:35.110910545Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll"
}
{
  "Time": "2022-08-16T10:30:35.111099634Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll/100,200,300"
}
{
  "Time": "2022-08-16T10:30:35.111110865Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAll/100,500"
}
{
  "Time": "2022-08-16T10:30:35.111147514Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAny"
}
{
  "Time": "2022-08-16T10:30:35.111154485Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAny/100,200,300"
}
{
  "Time": "2022-08-16T10:30:35.111161814Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "TestWhenAny/100,500"
}
{
  "Time": "2022-08-16T10:30:35.111190945Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "ExampleToDoneCh"
}
{
  "Time": "2022-08-16T10:30:35.111204574Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "ExampleWhenAll"
}
{
  "Time": "2022-08-16T10:30:35.111220494Z",
  "Action": "run",
  "Package": "github.com/devlights/gomy/ctxs",
  "Test": "ExampleWhenAny"
}