[ADD] test_inherits_depends: new test module

This commit adds a test to test the scenario fixed in the parent commit.

Creating a new test module is necessary as the bug is only revealed when the
current module is different than the model._original_module (cf c9837ac5dc)

Before that commit, was failing only the second search of
test_ir_model_data_inherits_depends.
Add other test to avoid regression of the bugs corrected at 574f4c3d and c9837ac

closes odoo/odoo#30116

odoo/addons/test_inherits/tests/test_inherits.py

@@ -26,3 +26,14 @@ class test_inherits(common.TransactionCase):
         pallet = self.env.ref('test_inherits.pallet_a')
         pallet.write({'name': 'C'})
         self.assertEqual(pallet.name, 'C')
+
+    def test_ir_model_data_inherits(self):
+        """ Check the existence of the correct ir.model.data """
+        IrModelData = self.env['ir.model.data']
+        field = IrModelData.search([('name', '=', 'field_test_unit__name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits')
+
+        field = IrModelData.search([('name', '=', 'field_test_box__name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits')

odoo/addons/test_inherits_depends/__init__.py

@@ -0,0 +1,3 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import models

odoo/addons/test_inherits_depends/__manifest__.py

@@ -0,0 +1,12 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+{
+    'name': 'test-inherits-depends',
+    'version': '0.1',
+    'category': 'Tests',
+    'description': """A module to verify the inheritance using _inherits in non-original modules.""",
+    'depends': ['test_inherits'],
+    'data': [],
+    'installable': True,
+    'auto_install': False,
+}

odoo/addons/test_inherits_depends/models.py

@@ -0,0 +1,10 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import models, fields
+
+
+# We add a field on this model
+class Unit(models.Model):
+    _inherit = 'test.unit'
+
+    second_name = fields.Char()

odoo/addons/test_inherits_depends/tests/__init__.py

@@ -0,0 +1,3 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import test_inherits

odoo/addons/test_inherits_depends/tests/test_inherits.py

@@ -0,0 +1,29 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo.tests import common
+
+
+class test_inherits(common.TransactionCase):
+
+    def test_ir_model_data_inherits_again(self):
+        """ Re-run test_inherits test to make sure another imd hasn't been created """
+        IrModelData = self.env['ir.model.data']
+        field = IrModelData.search([('name', '=', 'field_test_unit__name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits')
+
+        field = IrModelData.search([('name', '=', 'field_test_box__name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits')
+
+
+    def test_ir_model_data_inherits_depends(self):
+        """ Check the existence of the correct ir.model.data """
+        IrModelData = self.env['ir.model.data']
+        field = IrModelData.search([('name', '=', 'field_test_unit__second_name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits_depends')
+
+        field = IrModelData.search([('name', '=', 'field_test_box__second_name')])
+        self.assertEqual(len(field), 1)
+        self.assertEqual(field.module, 'test_inherits_depends')