from contextlib import contextmanager

import pytest

from pyroSAR._dev_config import ExamineExe
from pyroSAR.snap.auxil import ExamineSnap


@contextmanager
def not_raises(ExpectedException):
    try:
        yield

    except ExpectedException:
        raise AssertionError(
            "Did raise exception {0} when it should not!".format(
                repr(ExpectedException)
            )
        )

    except Exception:
        raise AssertionError(
            "An unexpected exception {0} raised.".format(repr(Exception))
        )


class TestExemineExe:
    def test_exception(self):
        with pytest.warns(UserWarning):
            ExamineExe.examine('some_exe_file.exe')

    def test_not_exception(self):
        SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
        with pytest.warns(None) as record:
            ExamineExe.examine(SNAP_EXECUTABLE)
        assert len(record) == 0


class TestExamineSnap:
    def test_exception(self):
        with pytest.warns(UserWarning):
            ExamineSnap(snap_executable='some_exe_file.exe')

    def test_not_exception(self):
        with pytest.warns(None) as record:
            ExamineSnap()
        assert len(record) == 0

import pytest
from contextlib import contextmanager
from pyroSAR._dev_config import ExamineExe
from pyroSAR.snap.auxil import ExamineSnap

@contextmanager
def not_raises(ExpectedException):
    try:
        yield

    except ExpectedException:
        raise AssertionError(
            "Did raise exception {0} when it should not!".format(
                repr(ExpectedException)
            )
        )

    except Exception:
        raise AssertionError(
            "An unexpected exception {0} raised.".format(repr(Exception))
        )

class TestExemineExe:
    def test_exception(self):
        with pytest.warns(UserWarning):
            ExamineExe.examine('some_exe_file.exe')

    def test_warn_snap(self):
        with pytest.warns(UserWarning):
            ExamineExe.examine('snap')
    # def test_not_exception(self):
    #     SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
    #     with not_raises(ValueError):
    #         ExamineExe.examine(SNAP_EXECUTABLE)

class TestExamineSnap:
    def test_exception(self):
        with pytest.warns(UserWarning):
            ExamineExe.examine('some_exe_file.exe')

    # def test_not_exception(self):
    #     with not_raises(AssertionError):
    #         test_snap_exe = ExamineSnap()
--- 
+++ 
@@ -1,7 +1,10 @@
+from contextlib import contextmanager
+
 import pytest
-from contextlib import contextmanager
+
 from pyroSAR._dev_config import ExamineExe
 from pyroSAR.snap.auxil import ExamineSnap
+
 
 @contextmanager
 def not_raises(ExpectedException):
@@ -20,24 +23,25 @@
             "An unexpected exception {0} raised.".format(repr(Exception))
         )
 
+
 class TestExemineExe:
     def test_exception(self):
         with pytest.warns(UserWarning):
             ExamineExe.examine('some_exe_file.exe')
 
-    def test_warn_snap(self):
-        with pytest.warns(UserWarning):
-            ExamineExe.examine('snap')
-    # def test_not_exception(self):
-    #     SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
-    #     with not_raises(ValueError):
-    #         ExamineExe.examine(SNAP_EXECUTABLE)
+    def test_not_exception(self):
+        SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
+        with pytest.warns(None) as record:
+            ExamineExe.examine(SNAP_EXECUTABLE)
+        assert len(record) == 0
+
 
 class TestExamineSnap:
     def test_exception(self):
         with pytest.warns(UserWarning):
-            ExamineExe.examine('some_exe_file.exe')
+            ExamineSnap(snap_executable='some_exe_file.exe')
 
-    # def test_not_exception(self):
-    #     with not_raises(AssertionError):
-    #         test_snap_exe = ExamineSnap()
+    def test_not_exception(self):
+        with pytest.warns(None) as record:
+            ExamineSnap()
+        assert len(record) == 0
Add unit test to determine if the classes ExamineExe and ExamineSnap will work properly.

Fixed a bug `assert len(record) == 1` in 'test_not_exception' method in class `TestExamineExe`.
