chore: simplify use of docker to run postgres for tests (#49)

* chore: use docker for postgres by default

 replace compose and custom image  with simple run command

* use postgres 9.4 in travis

* test against node 4, which npm uses in production

* npm run release instead of npm run version

* more useful npm run scripts

* add notes about Docker and Postgres to README [skip ci]

.travis.yml

@@ -1,8 +1,11 @@
+sudo: false
 language: node_js
 services:
   - postgres
+addons:
+  postgresql: "9.4"
 node_js:
-  - "5"
+  - "4"
 before_script:
   - psql -c 'create database oauth2_server;' -U postgres
 after_success: npm run coverage

README.md

@@ -26,6 +26,16 @@ POST /client
 POST /client/:client_id/token
 ```
 
+## Development and Testing
+
+For convenience, this project can leverage Docker to run Postgres for you. If you have Docker installed (and the daemon running), then a Postgres db will automatically be created and destroyed when running tests via `npm test`. If you _don't_ have Docker installed, you will need to run Postgres manually before testing.
+
+When developing and testing locally (outside of just running `npm t`) with Docker installed, you can use the following npm run scripts for convenience:
+
+- `npm run pg-test`: Initialize a Postgres db within a Docker container and leave it running
+- `npm run psql`: Login to the running Postgres container to run some manual queries
+- `npm run pg-test-down`: Destroy the running Postgres container
+
 ## License
 
 ISC

package.json

@@ -5,12 +5,17 @@
   "main": "./lib/server.js",
   "bin": "./bin/oauth2-server-pg.js",
   "scripts": {
-    "pretest": "standard",
+    "pretest": "standard; if pgrep \"docker\" > /dev/null; then (npm run pg-test-down || true) && npm run pg-test-up; sleep 5; fi",
     "test": "nyc mocha --timeout=5000 test/*.js",
+    "posttest": "if pgrep \"docker\" > /dev/null; then npm run pg-test-down; fi",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
-    "migrate-test": "db-migrate --config=./config-test.json --env=connection",
+    "pg-test-up": "docker run --name oauth2serverpg_postgres_1 -e POSTGRES_DB=oauth2_server -p 5432:5432/tcp -d postgres:9.4 postgres",
+    "pg-test-down": "docker rm -f oauth2serverpg_postgres_1",
+    "pg-test": "npm run pg-test-up; sleep 5; npm run migrate-test",
+    "migrate-test": "db-migrate --config=./config-test.json --env=connection up",
+    "psql": "docker exec -it oauth2serverpg_postgres_1 psql -U postgres -d oauth2_server",
     "migrate": "db-migrate --config=./config.json --env=connection",
-    "version": "standard-version"
+    "release": "standard-version"
   },
   "repository": {
     "type": "git",
@@ -58,4 +63,4 @@
       "**/test/**"
     ]
   }
-}
+}