Add new test for model setLogFile and fix setLogFile(None) error

CHANGELOG.md

@@ -3,7 +3,9 @@
 ## Unreleased
 ### Added
 - Add SCIP function SCIPgetTreesizeEstimation and wrapper getTreesizeEstimation
+- New test for model setLogFile
 ### Fixed
+- Fixed model.setLogFile(None) error
 ### Changed
 ### Removed
 

tests/test_model.py

@@ -1,4 +1,5 @@
 import pytest
+import os
 
 from pyscipopt import Model, SCIP_STAGE
 
@@ -300,3 +301,36 @@ def test_getTreesizeEstimation():
     m.optimize()
 
     assert m.getTreesizeEstimation() > 0
+
+def test_setLogFile():
+    m = Model()
+    x = m.addVar("x", vtype="I")
+    y = m.addVar("y", vtype="I")
+    m.addCons(x + y == 1)
+    m.setObjective(2*x+y)
+
+    log_file_name = "test_setLogFile.log"
+    m.setLogfile(log_file_name)
+    assert os.path.exists(log_file_name)
+
+    m.optimize()
+    del m
+    assert os.path.getsize(log_file_name) > 0
+    os.remove(log_file_name)
+
+def test_setLogFile_none():
+    m = Model()
+    x = m.addVar("x", vtype="I")
+    y = m.addVar("y", vtype="I")
+    m.addCons(x + y == 1)
+    m.setObjective(2*x+y)
+
+    log_file_name = "test_setLogfile_none.log"
+    m.setLogfile(log_file_name)
+    assert os.path.exists(log_file_name)
+
+    m.setLogfile(None)
+    m.optimize()
+    del m
+    assert os.path.getsize(log_file_name) == 0
+    os.remove(log_file_name)