devtools,tests/api: add set up with docker

tests/api/run.sh is added, which runs the symbol history comparison
script in docker.

For golang/go#37102

Change-Id: I11d7f3a61277d6756308f854a78504c3b63ac4fd
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/339395
Trust: Julie Qiu <[email protected]>
Run-TryBot: Julie Qiu <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Jonathan Amsterdam <[email protected]>

Author: julieqiu

devtools/docker/compose.yaml

@@ -13,6 +13,7 @@ x-go-variables: &go-variables
   GOMODCACHE: /gomodcache
   GO_DISCOVERY_CONFIG_DYNAMIC:
   GO_DISCOVERY_LOG_LEVEL: ${GO_DISCOVERY_LOG_LEVEL:-info}
+  GO_DISCOVERY_SERVE_STATS: "true"
 
 services:
   allbash:
@@ -41,6 +42,18 @@ services:
     volumes:
       - ../../:/pkgsite
     working_dir: /pkgsite
+  api:
+    image: golang:1.15.5
+    depends_on:
+      - frontend
+    environment:
+      <<: *go-variables
+      WAITFORIT_TIMEOUT: 300
+    entrypoint: ./third_party/wait-for-it/wait-for-it.sh frontend:8080 -- go run
+    command: "tests/api/main.go -frontend http://host.docker.internal:8080 -all compare "
+    volumes:
+      - ../../:/pkgsite
+    working_dir: /pkgsite
   e2e:
     image: node:14.17.0
     depends_on:

tests/api/config.yaml

@@ -0,0 +1,5 @@
+experiments:
+- Name: symbol-history-main-page
+  Rollout: 100
+- Name: symbol-history-versions-page
+  Rollout: 100

tests/api/run.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Copyright 2021 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+source devtools/docker.sh || { echo "Are you at repo root?"; exit 1; }
+
+set -e
+
+main() {
+  trap docker_cleanup EXIT
+  trap docker_error ERR
+
+  export GO_DISCOVERY_DATABASE_NAME=discovery_api_test
+  export GO_DISCOVERY_CONFIG_DYNAMIC=tests/api/config.yaml
+  export GO_DISCOVERY_SEED_DB_FILE=tests/api/seed.txt
+  dockercompose build && dockercompose run seeddb && dockercompose run api
+
+  local status=$?
+  if [ $status -eq 0 ]
+  then
+    echo "Done!"
+  else
+    echo "API tests failed."
+  fi
+  exit $status
+}
+
+main $@

tests/api/seed.txt

@@ -0,0 +1,5 @@
+# Copyright 2021 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+rsc.io/quote@all