Fix test file and add tests on github actions

.github/workflows/test.yml

@@ -0,0 +1,30 @@
+name: Test SortGS
+
+on:
+  push:
+    branches: [ master, dev ]
+  pull_request:
+    branches: [ master, dev ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Test with unittest
+      run: python -m unittest

.gitignore

@@ -17,3 +17,7 @@ ipython_config.py
 # Environments
 .env
 .venv
+
+# Other variables
+.DS_Store
+.vscode/

test/test_sortgs.py

@@ -8,13 +8,13 @@ class TestSortGS(unittest.TestCase):
     @classmethod
     def setUpClass(self):
         '''run once before all tests'''
-        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 10")
+        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 10 --endyear 2022")
         self.df_top_10=pd.read_csv('machine_learning.csv')
 
-        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 20")
+        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 20 --endyear 2022")
         self.df_top_20=pd.read_csv('machine_learning.csv')
 
-        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 20 --sortby 'cit/year'")
+        os.system("python sortgs.py --debug --kw 'machine learning' --nresults 20 --endyear 2022 --sortby 'cit/year'")
         self.df_top_sorted_cit_per_year=pd.read_csv('machine_learning.csv')
 
     def test_get_10_results(self):