Added tests

Author: Kartik Raj

src/client/linters/pylint.ts

@@ -76,7 +76,7 @@ export class Pylint extends BaseLinter {
         ];
         const messages = await this.run(minArgs.concat(args), document, cancellation, REGEX);
         messages.forEach(msg => {
-            msg.severity = this.parseMessagesSeverity(msg.type, this.pythonSettings.linting.pylintCategorySeverity);
+            msg.severity = this.parseMessagesSeverity(msg.type, settings.linting.pylintCategorySeverity);
         });
 
         return messages;

src/test/application/diagnostics/applicationDiagnostics.unit.test.ts

@@ -34,8 +34,8 @@ suite('Application Diagnostics - ApplicationDiagnostics', () => {
     const oldValueOfVSC_PYTHON_CI_TEST = process.env.VSC_PYTHON_CI_TEST;
 
     setup(() => {
-        process.env.VSC_PYTHON_UNIT_TEST = undefined;
-        process.env.VSC_PYTHON_CI_TEST = undefined;
+        delete process.env.VSC_PYTHON_UNIT_TEST;
+        delete process.env.VSC_PYTHON_CI_TEST;
         serviceContainer = typemoq.Mock.ofType<IServiceContainer>();
         envHealthCheck = typemoq.Mock.ofType<IDiagnosticsService>();
         envHealthCheck.setup(service => service.runInBackground).returns(() => true);