Add "resolveLanguages" test

Author: shati-patel

extensions/ql-vscode/src/vscode-tests/cli-integration/run-cli.test.ts

@@ -52,4 +52,15 @@ describe('Use cli', function() {
     expect(qlpacks['codeql-javascript']).not.to.be.undefined;
     expect(qlpacks['codeql-python']).not.to.be.undefined;
   });
+
+  it('should resolve languages', async function() {
+    skipIfNoCodeQL(this);
+    const languages = await cli.resolveLanguages();
+    // should have a bunch of languages. just check that a few known ones exist
+    expect(languages['cpp']).not.to.be.undefined;
+    expect(languages['csharp']).not.to.be.undefined;
+    expect(languages['java']).not.to.be.undefined;
+    expect(languages['javascript']).not.to.be.undefined;
+    expect(languages['python']).not.to.be.undefined;
+  });
 });