From 2765d7d5721ff9da865fee15e6b20ee7cad25c0c Mon Sep 17 00:00:00 2001
From: "pierre-francois.duc" <pierre-francois.duc@rl-institut.de>
Date: Wed, 10 Jul 2024 12:01:45 +0200
Subject: [PATCH 1/3] Set the random seed before potentially calling
 initialize()

---
 ramp/core/core.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ramp/core/core.py b/ramp/core/core.py
index 1578c93..1eaa957 100644
--- a/ramp/core/core.py
+++ b/ramp/core/core.py
@@ -105,13 +105,14 @@ def __init__(
         self.add_user(users)
 
         self.collect_appliances_from_users()
-        if self.date_start is not None and self.date_end is not None:
-            self.initialize()
 
         # Set global random seed if it is specified
         if self.random_seed:
             random.seed(self.random_seed)
 
+        if self.date_start is not None and self.date_end is not None:
+            self.initialize()
+
     @property
     def date_start(self):
         """Start date of the daily profiles generated by the UseCase instance"""

From e8a25e62b5113dd6c795f71fb8c057c06db667ac Mon Sep 17 00:00:00 2001
From: "pierre-francois.duc" <pierre-francois.duc@rl-institut.de>
Date: Wed, 10 Jul 2024 12:03:34 +0200
Subject: [PATCH 2/3] Update changelog

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 739dc52..72e78c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ Release History
 0.5.3 (dev)
 -----------
 
+**|fixed|**     Random seed behavior if both date_start and date_end are provided to UseCase instance (issue #156)
+
+
 0.5.2 (2024-06-07)
 ------------------
 

From 303522674c6f126b384bf2e9272912f374a8db87 Mon Sep 17 00:00:00 2001
From: "pierre-francois.duc" <pierre-francois.duc@rl-institut.de>
Date: Wed, 10 Jul 2024 12:13:59 +0200
Subject: [PATCH 3/3] Add test for random seed initialization

---
 tests/test_object_creation.py | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/tests/test_object_creation.py b/tests/test_object_creation.py
index 309ef56..592013a 100644
--- a/tests/test_object_creation.py
+++ b/tests/test_object_creation.py
@@ -1,6 +1,8 @@
 import pytest
 
-from ramp import User, Appliance
+from ramp import UseCase, User, Appliance
+from ramp.example.input_file_1 import User_list
+from copy import deepcopy
 
 
 @pytest.fixture
@@ -42,3 +44,25 @@ def test_skip_add_existing_appliances_to_user(test_user):
     test_user.add_appliance(appliance1)
 
     assert len(test_user.App_list) == 1
+
+
+def test_random_seed_initialization():
+    # Build use case 2 and fixed random seed
+    uc_1 = UseCase(
+        users=deepcopy(User_list),
+        random_seed=1,
+        date_start="2020-01-01",
+        date_end="2020-01-01",
+    )
+    # Initialize and generate load profile
+    uc_1.initialize(peak_enlarge=0.15, num_days=1)
+    uc_1_lp = uc_1.generate_daily_load_profiles()
+
+    # Build use case 2 and same fixed random seed as uc_1
+    uc_2 = UseCase(users=deepcopy(User_list), random_seed=1)
+
+    # Initialize and generate load profile
+    uc_2.initialize(peak_enlarge=0.15, num_days=1)
+    uc_2_lp = uc_2.generate_daily_load_profiles()
+
+    assert (uc_1_lp - uc_1_lp == 0).all()