Postgres test instructions with brew instructions

README.md

@@ -244,29 +244,34 @@ In order to use these functions, you need to explicitly import their correspondi
 
 ### Tests and Postgres
 
-To ```stack test``` with Postgresql you'll need to set the Postgres flag to true in esqueleto.cabal 
+To ```stack test``` with Postgresql you'll need to set the Postgres flag for [esqueleto.cabal](esqueleto.cabal)
+Do this from the command line with: ```stack test --flag esqueleto:postgresql```
 
-```
-Flag postgresql
-  Description: test postgresql. default is to test sqlite.
-  Default: False
-```
-
-If you don't have Postgres install it. Using apt-get it's just:
+If you don't have Postgres install it. 
+Using apt-get it's just:
 
 ```
 sudo apt-get install postgresql postgresql-contrib
 sudo apt-get install libpq-dev
 ```
 
-The connection details are located near the bottom of the test/Test.hs file:
+Using homebrew on OSx 
+
+```
+brew install postgresql
+brew install libpq
+```
+
+Detailed instructions on the Postgres wike [here](https://wiki.postgresql.org/wiki/Detailed_installation_guides) 
+
+The connection details are located near the bottom of the [test/Test.hs](test/Test.hs) file:
 
 ```
 #if defined(WITH_POSTGRESQL)
   withPostgresqlConn "host=localhost port=5432 user=esqutest password=esqutest dbname=esqutest"
 ```
 
-You can change these if you like but to just get them working set up as follows:
+You can change these if you like but to just get them working set up as follows on linux:
 
 ```$ sudo -u postgres createuser esqutest```
 
@@ -277,4 +282,17 @@ $ sudo -u postgres psql
 postgres=# \password esqutest
 ```
 
-Now ```stack test``` should envoke and pass all the Postgres tests.
+
+And on osx
+
+```$ createuser esqutest```
+
+```$ createdb esqutest```
+
+```
+$ psql postgres
+postgres=# \password esqutest
+```
+
+
+Now ```stack test --flag esqueleto:postgresql``` should envoke and pass all the Postgres tests.