8185 - Refactor test (Project-MONAI#8231)

Fixes Project-MONAI#8185

### Description

## Reorganize tests

I have looked at the imports in each test file and the test title to
identify which files were being tested. I mirrored the file structure of
MONAI on the `tests` folder and moved the files accordingly. I used some
helper scripts, but the process required substantial manual
intervention. When uncertain, I moved the tests to the `integration`
folder since the confusion always involved many imports, and I could not
find clarity from the test name.

Please review the integration folder carefully, which is the one that I
feel the least confident about.

```

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not applicable items -->
- [x] Non-breaking change (fix or new feature that would not break existing functionality).
- [x] Quick tests passed locally by running `./runtests.sh --quick --unittests  --disttests`.

---------

Signed-off-by: YunLiu <55491388+KumoLiu@users.noreply.github.com>
Signed-off-by: R. Garcia-Dias <rafaelagd@gmail.com>
Signed-off-by: Rafael Garcia-Dias <rafaelagd@gmail.com>
Signed-off-by: Eric Kerfoot <17726042+ericspod@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Rafael Garcia-Dias <rd24@lihe055-pc.isd.kcl.ac.uk>
Co-authored-by: YunLiu <55491388+KumoLiu@users.noreply.github.com>
Co-authored-by: Eric Kerfoot <17726042+ericspod@users.noreply.github.com>
Signed-off-by: Can-Zhao <volcanofly@gmail.com>

Author: 5 people

monai/transforms/io/array.py

@@ -11,7 +11,6 @@
 """
 A collection of "vanilla" transforms for IO functions.
 """
-
 from __future__ import annotations
 
 import inspect

runtests.sh

@@ -728,7 +728,7 @@ if [ $doDistTests = true ]
 then
     echo "${separator}${blue}run distributed unit test cases${noColor}"
     torch_validate
-    for i in tests/test_*_dist.py
+    for i in  $(find ./tests/ -name "*_dist.py")
     do
         echo "$i"
         ${cmdPrefix}${cmd} "$i"
@@ -740,7 +740,7 @@ if [ $doNetTests = true ]
 then
     set +e  # disable exit on failure so that diagnostics can be given on failure
     echo "${separator}${blue}integration${noColor}"
-    for i in tests/*integration_*.py
+    for i in tests/integration/*.py
     do
         echo "$i"
         ${cmdPrefix}${cmd} "$i"

tests/apps/__init__.py

@@ -0,0 +1,10 @@
+# Copyright (c) MONAI Consortium
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

tests/apps/deepedit/__init__.py

@@ -0,0 +1,10 @@
+# Copyright (c) MONAI Consortium
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

tests/test_deepedit_transforms.py renamed to tests/apps/deepedit/test_deepedit_transforms.py

@@ -0,0 +1,10 @@
+# Copyright (c) MONAI Consortium
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

tests/apps/deepgrow/__init__.py

@@ -0,0 +1,10 @@
+# Copyright (c) MONAI Consortium
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.