Specs refactor and tweaks

- Make ParseOptions func to take an arg and return struct so we can test it
- Refactor and add more tests for options parsing
- Run test suite on postgres 10.x branch
- Change format for connection idle timer from float64 to in

pkg/client/client.go

@@ -367,7 +367,13 @@ func (client *Client) Close() error {
 }
 
 func (client *Client) IsIdle() bool {
-	return time.Since(client.lastQueryTime).Minutes() > command.Opts.ConnectionIdleTimeout
+	mins := int(time.Since(client.lastQueryTime).Minutes())
+
+	if command.Opts.ConnectionIdleTimeout > 0 {
+		return mins >= command.Opts.ConnectionIdleTimeout
+	}
+
+	return false
 }
 
 // Fetch all rows as strings for a single column