tests: reuse proper checks for type support

Part of #422

test/entrypoint/srv_select/storage_init.lua

@@ -1,6 +1,3 @@
-local datetime_supported, datetime = pcall(require, 'datetime')
-local decimal_supported, _ = pcall(require, 'decimal')
-
 local crud_utils = require('crud.common.utils')
 
 return function()
@@ -231,7 +228,7 @@ return function()
         if_not_exists = true,
     })
 
-    if decimal_supported then
+    if crud_utils.tarantool_supports_decimals() then
         local decimal_format = {
             {name = 'id', type = 'unsigned'},
             {name = 'bucket_id', type = 'unsigned'},
@@ -327,7 +324,7 @@ return function()
         })
     end
 
-    if datetime_supported then
+    if crud_utils.tarantool_supports_datetimes() then
         local datetime_format = {
             {name = 'id', type = 'unsigned'},
             {name = 'bucket_id', type = 'unsigned'},
@@ -423,8 +420,7 @@ return function()
         })
     end
 
-    local interval_supported = datetime_supported and (datetime.interval ~= nil)
-    if interval_supported then
+    if crud_utils.tarantool_supports_intervals() then
         -- Interval is non-indexable.
         local interval_space = box.schema.space.create('interval', {
             if_not_exists = true,

test/helper.lua

@@ -958,20 +958,28 @@ function helpers.prepare_ordered_data(g, space, expected_objects, bucket_id, ord
     t.assert_equals(objects, expected_objects)
 end
 
+function helpers.is_decimal_supported()
+    return crud_utils.tarantool_supports_decimals()
+end
+
+function helpers.is_datetime_supported()
+    return crud_utils.tarantool_supports_datetimes()
+end
+
+function helpers.is_interval_supported()
+    return crud_utils.tarantool_supports_intervals()
+end
+
 function helpers.skip_decimal_unsupported()
-    local module_available, _ = pcall(require, 'decimal')
-    t.skip_if(not module_available, 'decimal is not supported')
+    t.skip_if(not helpers.is_decimal_supported(), 'decimal is not supported')
 end
 
 function helpers.skip_datetime_unsupported()
-    local module_available, _ = pcall(require, 'datetime')
-    t.skip_if(not module_available, 'datetime is not supported')
+    t.skip_if(not helpers.is_datetime_supported(), 'datetime is not supported')
 end
 
 function helpers.skip_interval_unsupported()
-    local datetime_supported, datetime = pcall(require, 'datetime')
-    local interval_supported = datetime_supported and (datetime.interval ~= nil)
-    t.skip_if(not interval_supported, 'interval is not supported')
+    t.skip_if(not helpers.is_interval_supported(), 'interval is not supported')
 end
 
 function helpers.merge_tables(t1, t2, ...)

test/integration/read_scenario.lua

@@ -5,8 +5,9 @@
 -- Scenarios here are for `srv_select` entrypoint.
 
 local t = require('luatest')
-local datetime_supported, datetime = pcall(require, 'datetime')
-local decimal_supported, decimal = pcall(require, 'decimal')
+
+local _, datetime = pcall(require, 'datetime')
+local _, decimal = pcall(require, 'decimal')
 
 local helpers = require('test.helper')
 
@@ -98,7 +99,7 @@ end
 
 local decimal_vals = {}
 
-if decimal_supported then
+if helpers.is_decimal_supported() then
     decimal_vals = {
         smallest_negative = decimal.new('-123456789012345678.987431234678392'),
         bigger_negative = decimal.new('-123456789012345678.987431234678391'),
@@ -318,7 +319,7 @@ end
 
 local datetime_vals = {}
 
-if datetime_supported then
+if helpers.is_datetime_supported() then
     datetime_vals = {
         yesterday = datetime.new{
             year = 2024,