tests/report: Use capsys fixture to redirect stdout/stderr

Replace custom output redirection.

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

tests/composition/test_report.py

@@ -1,5 +1,3 @@
-import contextlib
-import io
 import sys
 
 import numpy as np
@@ -12,29 +10,25 @@
 @pytest.mark.skipif(sys.platform == 'win32', reason="<Incompatible UDF-8 formatting of rich Console output>")
 class TestReport():
 
-    def test_reportOutputPref_true(self):
+    def test_reportOutputPref_true(self, capsys):
 
         t = pnl.TransferMechanism()
         t.reportOutputPref = ReportOutput.FULL
 
-        f = io.StringIO()
-        with contextlib.redirect_stdout(f):
-            t.execute(1)
-        output = f.getvalue()
+        t.execute(1)
+        output = capsys.readouterr().out
 
         assert 'input: 1.0' in output
         assert 'output: 1.0' in output
         assert 'params' not in output
 
-    def test_reportOutputPref_params(self):
+    def test_reportOutputPref_params(self, capsys):
 
         t = pnl.TransferMechanism()
         t.reportOutputPref = 'params'
 
-        f = io.StringIO()
-        with contextlib.redirect_stdout(f):
-            t.execute(1, report_output=ReportOutput.FULL)
-        output = f.getvalue()
+        t.execute(1, report_output=ReportOutput.FULL)
+        output = capsys.readouterr().out
 
         assert 'input: 1.0' in output
         assert 'output: 1.0' in output