Update README file with test information and format it

Author: sharadraju

README.md

@@ -2,7 +2,9 @@
 
 Use the PDO_OCI extension to access Oracle Database via PHP Data Objects (PDO) APIs.
 
-This repository is for PHP 8.3+ as it [was decided to unbundle](https://wiki.php.net/rfc/unbundle_imap_pspell_oci8) PDO OCI / OCI8 extension from the PHP source code.
+This repository is for PHP 8.3+ as it
+[was decided to unbundle](https://wiki.php.net/rfc/unbundle_imap_pspell_oci8)
+PDO OCI / OCI8 extension from the PHP source code.
 
 Documentation is at https://www.php.net/pdo_oci
 
@@ -20,15 +22,24 @@ make install
 
 ```
 
-To complete installation, add "extension=pdo_oci.so" or "extension=php_pdo_oci.dll" (Windows) to your php.ini file.
+To complete installation, add "extension=pdo_oci.so" or
+"extension=php_pdo_oci.dll" (Windows) to your php.ini file.
+
+Tests
+-----
+
+To run the tests, see [tests/README.md](tests/README.md).
 
 Additional Requirements
 ------------------------
 
-The PDO_OCI extension can be linked with Oracle Client libraries from Oracle Database 11.2 or later. These libraries are found in your database
+The PDO_OCI extension can be linked with Oracle Client libraries from Oracle
+Database 11.2 or later. These libraries are found in your database
 installation, or in the free Oracle Instant Client packages from
 https://www.oracle.com/database/technologies/instant-client.html.
-Install the 'Basic' or 'Basic Light' Instant Client package for running applications with this extension. If building from source, then also install the Instant Client SDK package.
+Install the 'Basic' or 'Basic Light' Instant Client package for running
+applications with this extension. If building from source, then also install
+the Instant Client SDK package.
 
 Oracle's standard cross-version connectivity applies. For example, PHP PDO_OCI
 linked with Instant Client 19c can connect to Oracle Database 11.2 onward. See