Updates for new pytest release

str() for ExceptionInfo changed its format, so we are now using
the newly-introduced `ExceptionInfo.match(regexp)` method instead.
Depend on pytest>5 but <6 to prevent this kind of surprise in the future.

See also: pytest-dev/pytest#5412

test_requirements.txt

@@ -1,4 +1,4 @@
-pytest
+pytest>=5,<6
 pytest-cov
 pytest-asyncio
 aiohttp

tests/io/test_empad.py

@@ -141,19 +141,20 @@ def test_invalid_size():
         scan_size=(4, 5),
     )
     ds = ds.initialize()
-    with pytest.raises(DataSetException) as e:
+    with pytest.raises(DataSetException) as einfo:
         ds.check_valid()
-    assert "invalid filesize" in str(e)
+
+    assert einfo.match("invalid filesize")
 
 
 def test_nonexistent():
     ds = EMPADDataSet(
         path="/does/not/exist.raw",
         scan_size=(4, 4),
     )
-    with pytest.raises(DataSetException) as e:
+    with pytest.raises(DataSetException) as einfo:
         ds = ds.initialize()
-    assert "No such file or directory" in str(e)
+    assert einfo.match("No such file or directory")
 
 
 def test_detect_fail():

tests/test_analysis_base.py

@@ -14,10 +14,10 @@ def test_result_set():
 
     results = AnalysisResultSet([result])
 
-    with pytest.raises(AttributeError) as e:
+    with pytest.raises(AttributeError) as einfo:
         results.foo
-    assert "not found" in str(e)
-    assert "have: test" in str(e)
+    assert einfo.match("not found")
+    assert einfo.match("have: test")
 
     assert results.test == result
     assert len(results) == 1