added load

src/easyreflectometry/project.py

@@ -3,6 +3,7 @@
 import os
 from pathlib import Path
 from typing import List
+from typing import Optional
 
 from easyscience.fitting import AvailableMinimizers
 
@@ -120,6 +121,17 @@ def save_project_json(self):
         except Exception as exception:
             print(exception)
 
+    def load_project_json(self, path: Optional[Path] = None):
+        if path is None:
+            path = self.path_project_json
+
+        if path.exists():
+            with open(path, 'r') as file:
+                project_dict = json.load(file)
+                self._extract_project_dict(project_dict)
+        else:
+            print(f'ERROR: File {path} does not exist')
+
     def _construct_project_dict(self, include_materials_not_in_model=False):
         project_dict = {}
         project_dict['info'] = self._info

tests/test_project.py

@@ -318,3 +318,20 @@ def test_save_project(self):
 
         # Expect
         assert project_path.exists()
+
+    def test_load_project(self):
+        # When
+        project = Project()
+        project._models.append(Model())
+        project._info['name'] = 'Test_Project'
+        project.save_project_json()
+
+        global_object.map._clear()
+        new_project = Project()
+
+        # Then
+        new_project.load_project_json(new_project._current_path / 'Test_Project' / 'project.json')
+
+        # Expect
+        assert len(new_project._models) == 1
+        assert new_project._info['name'] == 'Test_Project'