The `hello_world` extension provides a `greet` function, which returns a greeting.

In database version control for postgres functions

# Function VC (Version Control)

Function VC is a set of functions that allow you to version control your Postgres functions in the database.

## Creating a function:

```sql
SELECT create_function_from_source(
$$
-- Note that you can just paste the function below:
CREATE OR REPLACE FUNCTION public.convert_to_uuid(input_value text)
 RETURNS uuid
AS $function$
DECLARE
  hash_hex text;
BEGIN
  -- Return null if input_value is null or an empty string
  IF input_value IS NULL OR NULLIF(input_value, '') IS NULL THEN
    RETURN NULL;
  END IF;
  hash_hex := substring(encode(digest(input_value::bytea, 'sha512'), 'hex'), 1, 36);
  RETURN (left(hash_hex, 8) || '-' || right(hash_hex, 4) || '-4' || right(hash_hex, 3) || '-a' || right(hash_hex, 3) || '-' || right(hash_hex, 12))::uuid;
END;
$function$
LANGUAGE plpgsql
IMMUTABLE
SECURITY DEFINER;
-- End of the function above
$$
);
```

Rolling back a function:

```sql

SELECT rollback_function('convert_to_uuid');

```

Storing all existing functions in the database:

```sql
SELECT archive.setup_function_history();
```


A collection of functions designed to make testing Supabase projects easier

# Supabase Test Helpers
A collection of functions designed to make testing Supabase projects easier. Created as part of our [open source SaaS starter for Supabase](https://usebasejump.com).

## Quick Start (recommended)
If you're using Supabase:

1) Install dbdev following the instructions here: [github.com/supabase/dbdev](https://github.com/supabase/dbdev)
2) Install the test helpers as an extension:

```sql
select dbdev.install('basejump-supabase_test_helpers');
```

I don't recommend activating the extension in production directly, instead you can activate it as part of your test suite.  For example:

```sql
BEGIN;
CREATE EXTENSION "basejump-supabase_test_helpers";

select plan(1);
-- create a table, which will have RLS disabled by default
CREATE TABLE public.tb1 (id int, data text);
ALTER TABLE public.tb1 ENABLE ROW LEVEL SECURITY;

-- test to make sure RLS check works
select check_test(tests.rls_enabled('public', 'tb1'), true);

SELECT * FROM finish();
ROLLBACK;
```

For a basic example, check out the [example blog tests](https://github.com/usebasejump/supabase-test-helpers/blob/main/tests/04-blog-example.sql).

## Manual Installation (not recommended)
Copy the contents of the most recent version into the very first alphabetical test in your test suite, such as `00000-supabase_test_helpers.sql`. This will ensure that the test helpers are removed after your tests have run. for it to work, you need to create some fake tests at the bottom of the file for pgtap to not complain.  Here's an example:
```sql

-- we have to run some tests to get this to pass as the first test file.
-- investigating options to make this better.  Maybe a dedicated test harness
-- but we dont' want these functions to always exist on the database.
BEGIN;

    select plan(7);
    select function_returns('tests', 'create_supabase_user', Array['text', 'text', 'text', 'jsonb'], 'uuid');
    select function_returns('tests', 'get_supabase_uid', Array['text'], 'uuid');
    select function_returns('tests', 'get_supabase_user', Array['text'], 'json');
    select function_returns('tests', 'authenticate_as', Array['text'], 'void');
    select function_returns('tests', 'clear_authentication', Array[null], 'void');
    select function_returns('tests', 'rls_enabled', Array['text', 'text'], 'text');
    select function_returns('tests', 'rls_enabled', Array['text'], 'text');
    select * from finish();
ROLLBACK;
```

## Writing tests
Check out the docs below for available helpers. To view a comprehensive example, check out our [blog tests](https://github.com/usebasejump/supabase-test-helpers/blob/main/tests/04-blog-example.sql).

## Test Helpers
The following is auto-generated off of comments in the `supabase_test_helpers--0.0.2.sql` file. Any changes added to the README directly will be overwritten.




  - [tests.create_supabase_user(identifier text, email text, phone text)](#testscreate_supabase_useridentifier-text-email-text-phone-text)
  - [tests.get_supabase_user(identifier text)](#testsget_supabase_useridentifier-text)
  - [tests.get_supabase_uid(identifier text)](#testsget_supabase_uididentifier-text)
  - [tests.authenticate_as(identifier text)](#testsauthenticate_asidentifier-text)
  - [tests.authenticate_as_service_role()](#testsauthenticate_as_service_role)
  - [tests.clear_authentication()](#testsclear_authentication)
  - [tests.rls_enabled(testing_schema text)](#testsrls_enabledtesting_schema-text)
  - [tests.rls_enabled(testing_schema text, testing_table text)](#testsrls_enabledtesting_schema-text-testing_table-text)
- [Contributing](#contributing)





### tests.create_supabase_user(identifier text, email text, phone text)

Creates a new user in the `auth.users` table.
You can recall a user's info by using `tests.get_supabase_user(identifier text)`.

Parameters:
- `identifier` - A unique identifier for the user. We recommend you keep it memorable like "test_owner" or "test_member"
- `email` - (Optional) The email address of the user
- `phone` - (Optional) The phone number of the user
- `metadata` - (Optional) Additional metadata to be added to the user

Returns:
- `user_id` - The UUID of the user in the `auth.users` table

Example:
```sql
  SELECT tests.create_supabase_user('test_owner');
  SELECT tests.create_supabase_user('test_member', 'member@test.com', '555-555-5555');
  SELECT tests.create_supabase_user('test_member', 'member@test.com', '555-555-5555', '{"key": "value"}'::jsonb);
```

### tests.get_supabase_user(identifier text)

Returns the user info for a user created with `tests.create_supabase_user`.

Parameters:
- `identifier` - The unique identifier for the user

Returns:
- `user_id` - The UUID of the user in the `auth.users` table

Example:
```sql
  SELECT posts where posts.user_id = tests.get_supabase_user('test_owner') -> 'id';
```

### tests.get_supabase_uid(identifier text)

Returns the user UUID for a user created with `tests.create_supabase_user`.

Parameters:
- `identifier` - The unique identifier for the user

Returns:
- `user_id` - The UUID of the user in the `auth.users` table

Example:
```sql
  SELECT posts where posts.user_id = tests.get_supabase_uid('test_owner') -> 'id';
```

### tests.authenticate_as(identifier text)
  Authenticates as a user created with `tests.create_supabase_user`.

Parameters:
- `identifier` - The unique identifier for the user

Returns:
- `void`

Example:
```sql
  SELECT tests.create_supabase_user('test_owner');
  SELECT tests.authenticate_as('test_owner');
```

### tests.authenticate_as_service_role()
  Clears authentication object and sets role to service_role.

Returns:
- `void`

Example:
```sql
  SELECT tests.authenticate_as_service_role();
```

### tests.clear_authentication()
  Clears out the authentication and sets role to anon

Returns:
- `void`

Example:
```sql
  SELECT tests.create_supabase_user('test_owner');
  SELECT tests.authenticate_as('test_owner');
  SELECT tests.clear_authentication();
```

### tests.rls_enabled(testing_schema text)
pgTAP function to check if RLS is enabled on all tables in a provided schema

Parameters:
- schema_name text - The name of the schema to check

Example:
```sql
  BEGIN;
      select plan(1);
      select tests.rls_enabled('public');
      SELECT * FROM finish();
  ROLLBACK;
```

### tests.rls_enabled(testing_schema text, testing_table text)
pgTAP function to check if RLS is enabled on a specific table

Parameters:
- schema_name text - The name of the schema to check
- testing_table text - The name of the table to check

Example:
```sql
   BEGIN;
       select plan(1);
       select tests.rls_enabled('public', 'accounts');
       SELECT * FROM finish();
   ROLLBACK;
```



## Contributing
Yes, please! Anything you've found helpful for testing Supabase projects is welcome. To contribute:

* Create a new version of supabase_test_helpers `supabase_test_helpers--{major}-{minor}-{patch}.sql`
* New versions are intended to be a fresh install, so copy the contents of the previous version into the new version.
* Add [pgTAP compliant test functions](https://pgtap.org/documentation.html#composeyourself) to the new version
* Comments should be added above each function, follow the examples in the file.
* Create a migration file `supabase_test_helpers--{oldMajor}-{oldMinor}-{oldPatch}--{newMajor}-{newMinor}-{newPatch}.sql` to upgrade to the new version. Include ONLY your migration code, not the entire contents of the new version.
* Add tests for your functions in `tests/XX-your-function-name.sql`
* Submit a PR

This extension creates a table named countries which contains the countries of the world.

raminder

Packages