Add test for resolveQueryByLanguage

extensions/ql-vscode/src/vscode-tests/cli-integration/data/simple-query.ql

@@ -1,3 +1,5 @@
+import javascript
+
 predicate edges(int i, int j) {
   i = 1 and j = 2 or i = 2 and j = 3
 }

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

@@ -1,8 +1,9 @@
 import { expect } from 'chai';
-import { extensions } from 'vscode';
+import { extensions, Uri } from 'vscode';
+import * as path from 'path';
 import { SemVer } from 'semver';
 
-import { CodeQLCliServer } from '../../cli';
+import { CodeQLCliServer, QueryInfoByLanguage } from '../../cli';
 import { CodeQLExtensionInterface } from '../../extension';
 import { skipIfNoCodeQL } from '../ensureCli';
 import { getOnDiskWorkspaceFolders } from '../../helpers';
@@ -60,4 +61,11 @@ describe('Use cli', function() {
       expect(languages).to.have.property(expectedLanguage).that.is.not.undefined;
     }
   });
+
+  it('should resolve query by language', async function() {
+    skipIfNoCodeQL(this);
+    const queryPath = path.join(__dirname, 'data', 'simple-query.ql');
+    const queryInfo: QueryInfoByLanguage = await cli.resolveQueryByLanguage(getOnDiskWorkspaceFolders(), Uri.file(queryPath));
+    expect((Object.keys(queryInfo.byLanguage))[0]).to.eql('javascript');
+  });
 });