add test diagnostics test for internal error

javascript/ql/integration-tests/all-platforms/diagnostics/internal-error/diagnostics.expected

@@ -0,0 +1,15 @@
+{
+    "timestamp": "2023-03-23T12:04:41.317+00:00",
+    "source": {
+        "id": "js/internal-error",
+        "name": "Internal error",
+        "extractorName": "javascript"
+    },
+    "markdownMessage": "Internal error: com.semmle.util.exception.CatastrophicError: The TypeScript parser wrapper crashed with exit code 1",
+    "severity": "unknown",
+    "visibility": {
+        "cliSummaryTable": true,
+        "statusPage": false,
+        "telemetry": true
+    }
+}

javascript/ql/integration-tests/all-platforms/diagnostics/internal-error/src/my_failure.ts

@@ -0,0 +1,17 @@
+type Output<K, S extends any[]> = {
+  (...args: S): any;
+};
+
+declare function createThing<K extends string, S extends any[]>(
+  type: K,
+  fn: (...args: S) => any
+): Output<K, S>;
+
+const one = createThing("one", () => ({}));
+
+const two = createThing("two", () => ({}));
+
+const three = createThing("three", (cursor: string) => null);
+const four = createThing("four", (error: number) => null);
+
+type Events = Array<typeof one | typeof two | typeof three | typeof four>;

javascript/ql/integration-tests/all-platforms/diagnostics/internal-error/test.py

@@ -0,0 +1,7 @@
+import os
+from create_database_utils import *
+from diagnostics_test_utils import *
+
+run_codeql_database_create([], lang="javascript", runFunction = runUnsuccessfully, db = None)
+
+check_diagnostics()

javascript/ql/integration-tests/all-platforms/diagnostics/internal-error/tsconfig.json

@@ -0,0 +1 @@
+{}