introduce tests

src/config-utils.test.ts

@@ -199,6 +199,50 @@ test("load non-empty input", async t => {
   });
 });
 
+test("default queries are used", async t => {
+  return await util.withTmpDir(async tmpDir => {
+    process.env['RUNNER_TEMP'] = tmpDir;
+    process.env['GITHUB_WORKSPACE'] = tmpDir;
+
+    // Check that the default behaviour is to add the default queries.
+    // In this case if a config file is specified by does not include
+    // the disable-default-queries field.
+    // We determine this by whether CodeQL.resolveQueries is called
+    // with the correct arguments.
+
+    const resolveQueriesArgs: {queries: string[], extraSearchPath: string | undefined}[] = [];
+    CodeQL.setCodeQL({
+      resolveQueries: async function(queries: string[], extraSearchPath: string | undefined) {
+        resolveQueriesArgs.push({queries, extraSearchPath});
+        return {
+          byLanguage: {
+            'javascript': {},
+          },
+          noDeclaredLanguage: {},
+          multipleDeclaredLanguages: {},
+        };
+      },
+    });
+
+    // Just create a generic config object with non-default values for all fields
+    const inputFileContents = `
+      paths:
+        - foo`;
+
+    fs.mkdirSync(path.join(tmpDir, 'foo'));
+
+    fs.writeFileSync(path.join(tmpDir, 'input'), inputFileContents, 'utf8');
+    setInput('config-file', 'input');
+
+    await configUtils.initConfig();
+
+    // Check resolve queries was called correctly
+    t.deepEqual(resolveQueriesArgs.length, 1);
+    t.deepEqual(resolveQueriesArgs[0].queries, ['javascript-code-scanning.qls']);
+    t.deepEqual(resolveQueriesArgs[0].extraSearchPath, undefined);
+  });
+});
+
 test("API client used when reading remote config", async t => {
   return await util.withTmpDir(async tmpDir => {
     process.env['RUNNER_TEMP'] = tmpDir;