Function TestDatabaseURL

rivershared/riversharedtest/riversharedtest.go:217–236

TestDatabaseURL returns `TEST_DATABASE_URL` or a default URL pointing to `river_test` and with suitable connection configuration defaults.

()

// TestDatabaseURL returns `TEST_DATABASE_URL` or a default URL pointing to
// `river_test` and with suitable connection configuration defaults.
func TestDatabaseURL() string {
	return cmp.Or(
		os.Getenv("TEST_DATABASE_URL"),

		// 100 conns is the default maximum for Homebrew.
		//
		// It'd be nice to be able to set this number really high because it'd
		// mean less waiting time acquiring connections in tests, but with
		// default settings, contention between tests/test packages leading to
		// exhausion on the Postgres server is definitely a problem. At numbers
		// >75 I started seeing a lot of errors between tests within a single
		// package, and worse yet, at numbers >=20 I saw major problems between
		// packages (i.e. as parallel packages run at the same time).
		//
		// 15 is about as high as I found I could set it while keeping test runs
		// stable. This could be much higher in areas where we know Postgres is
		// configured with more allowed max connections.
		"postgres://localhost:5432/river_test?pool_max_conns=15&sslmode=disable",
	)
}

// TimeStub implements baseservice.TimeGeneratorWithStub to allow time to be
// stubbed in tests.