Change CURRENT_TIMESTAMP parameter for col_default_is

It turns out i have been **years** doing this wrong: you are supposed to
pass that value as a text, like 'CURRENT_TIMESTAMP', not like the
keyword so that it returns the current timestamp as a timestamptz.

However, i have been doing it wrong because of a bug in previous
versions of pgTAP[0], that did not take into account keywords such as
CURRENT_TIMESTAMP or CURRENT_DATE and was comparing their actual values,
not the names, therefore i thought that i misread the documentation.

Only now have discovered this because Debian 12 upgraded pgTAP version
to 1.2.0.

[0]: https://github.com/theory/pgtap/issues/244

test/company.sql

@@ -123,7 +123,7 @@ select has_column('company', 'created_at');
 select col_type_is('company', 'created_at', 'timestamp with time zone');
 select col_not_null('company', 'created_at');
 select col_has_default('company', 'created_at');
-select col_default_is('company', 'created_at', current_timestamp);
+select col_default_is('company', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 set client_min_messages to warning;

test/contact.sql

@@ -110,7 +110,7 @@ select has_column('contact', 'created_at');
 select col_type_is('contact', 'created_at', 'timestamp with time zone');
 select col_not_null('contact', 'created_at');
 select col_has_default('contact', 'created_at');
-select col_default_is('contact', 'created_at', current_timestamp);
+select col_default_is('contact', 'created_at', 'CURRENT_TIMESTAMP');
 
 set client_min_messages to warning;
 truncate contact cascade;

test/expense.sql

@@ -82,7 +82,7 @@ select has_column('expense', 'created_at');
 select col_type_is('expense', 'created_at', 'timestamp with time zone');
 select col_not_null('expense', 'created_at');
 select col_has_default('expense', 'created_at');
-select col_default_is('expense', 'created_at', current_timestamp);
+select col_default_is('expense', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 set client_min_messages to warning;

test/invoice.sql

@@ -52,7 +52,7 @@ select has_column('invoice', 'invoice_date');
 select col_type_is('invoice', 'invoice_date', 'date');
 select col_not_null('invoice', 'invoice_date');
 select col_has_default('invoice', 'invoice_date');
-select col_default_is('invoice', 'invoice_date', current_date);
+select col_default_is('invoice', 'invoice_date', 'CURRENT_DATE');
 
 select has_column('invoice', 'contact_id');
 select col_is_fk('invoice', 'contact_id');
@@ -99,7 +99,7 @@ select has_column('invoice', 'created_at');
 select col_type_is('invoice', 'created_at', 'timestamp with time zone');
 select col_not_null('invoice', 'created_at');
 select col_has_default('invoice', 'created_at');
-select col_default_is('invoice', 'created_at', current_timestamp);
+select col_default_is('invoice', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 set client_min_messages to warning;

test/login_attempt.sql

@@ -42,7 +42,7 @@ select has_column('login_attempt', 'attempted_at');
 select col_type_is('login_attempt', 'attempted_at', 'timestamp with time zone');
 select col_not_null('login_attempt', 'attempted_at');
 select col_has_default('login_attempt', 'attempted_at');
-select col_default_is('login_attempt', 'attempted_at', current_timestamp);
+select col_default_is('login_attempt', 'attempted_at', 'CURRENT_TIMESTAMP');
 
 select *
 from finish();

test/product.sql

@@ -68,7 +68,7 @@ select has_column('product', 'created_at');
 select col_type_is('product', 'created_at', 'timestamp with time zone');
 select col_not_null('product', 'created_at');
 select col_has_default('product', 'created_at');
-select col_default_is('product', 'created_at', current_timestamp);
+select col_default_is('product', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 set client_min_messages to warning;

test/quote.sql

@@ -52,7 +52,7 @@ select has_column('quote', 'quote_date');
 select col_type_is('quote', 'quote_date', 'date');
 select col_not_null('quote', 'quote_date');
 select col_has_default('quote', 'quote_date');
-select col_default_is('quote', 'quote_date', current_date);
+select col_default_is('quote', 'quote_date', 'CURRENT_DATE');
 
 select has_column('quote', 'quote_status');
 select col_is_fk('quote', 'quote_status');
@@ -91,7 +91,7 @@ select has_column('quote', 'created_at');
 select col_type_is('quote', 'created_at', 'timestamp with time zone');
 select col_not_null('quote', 'created_at');
 select col_has_default('quote', 'created_at');
-select col_default_is('quote', 'created_at', current_timestamp);
+select col_default_is('quote', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 set client_min_messages to warning;

test/user.sql

@@ -68,7 +68,7 @@ select has_column('user', 'created_at');
 select col_type_is('user', 'created_at', 'timestamp with time zone');
 select col_not_null('user', 'created_at');
 select col_has_default('user', 'created_at');
-select col_default_is('user', 'created_at', current_timestamp);
+select col_default_is('user', 'created_at', 'CURRENT_TIMESTAMP');
 
 
 select *