Add virtual_env unit test

.github/workflows/CI.yaml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install dependencies
-        run: sudo apt install -y fish curl git
+        run: sudo apt install -y fish curl git python
 
       - name: Install Tide as dev unattended
         shell: fish {0}

tests/virtual_env.fish

@@ -0,0 +1,23 @@
+@mesg '---------virtual_env---------'
+
+function _virtual_env
+    _tide_decolor (_tide_item_virtual_env)
+end
+
+set -l dir ~/python_project
+
+mkdir -p $dir
+cd $dir
+
+@test 'nothing' (_virtual_env) -z
+
+python -m venv .venv
+source .venv/bin/activate.fish
+
+set -lx tide_virtual_env_display projectName
+@test 'projectName' (_virtual_env) = 'python_project'
+
+set -lx tide_virtual_env_display venvName
+@test 'venvName' (_virtual_env) = '.venv'
+
+rm -r $dir