From feaec32653e29963d9bf66342f1d8872b659371b Mon Sep 17 00:00:00 2001
From: Alinson S Xavier <axavier@anl.gov>
Date: Sun, 12 Apr 2020 15:08:07 -0500
Subject: [PATCH] Add test for InternalSolver.fix

---
 .../miplearn/solvers/tests/test_internal_solver.py   | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/python/miplearn/solvers/tests/test_internal_solver.py b/src/python/miplearn/solvers/tests/test_internal_solver.py
index 983adc4..3715fd3 100644
--- a/src/python/miplearn/solvers/tests/test_internal_solver.py
+++ b/src/python/miplearn/solvers/tests/test_internal_solver.py
@@ -50,6 +50,18 @@ def test_internal_solver_warm_starts():
         stats = solver.solve(tee=True)
         assert stats["Warm start value"] is None
 
+        solver.fix({
+            "x": {
+                0: 1.0,
+                1: 0.0,
+                2: 0.0,
+                3: 1.0,
+            }
+        })
+        stats = solver.solve(tee=True)
+        assert stats["Lower bound"] == 725.0
+        assert stats["Upper bound"] == 725.0
+
 
 def test_internal_solver():
     for solver in [GurobiSolver(), CPLEXSolver()]: