Allow tests without requiring Unix sockets

[omus]

Usually when I am interacting with a local Postgres server I end up use a Docker container. It would be nice if you allowed an environmental variable to specify the connection string such that I could supply the port number of my database server.

For example if I wanted to run the tests using a PostgreSQL container I could run the following to get a working PostgreSQL running on localhost:5555 using the user "postgres" with no password:

docker run --name libpq-test -p 5555:5432 -d postgres

[iamed2]

The option to do this already exists in PostgreSQL: https://www.postgresql.org/docs/10/static/libpq-envars.html

[omus]

Ah, thank you. Sorry for the noise. Tests now work with the above container and:

julia> ENV["PGHOST"] = "localhost"
"localhost"

julia> ENV["PGPORT"] = 5555
5555

julia> Pkg.test("LibPQ")
...
INFO: LibPQ tests passed