1 files changed, 43 insertions, 0 deletions
diff --git a/cli/tests/integration/lsp_tests.rs b/cli/tests/integration/lsp_tests.rs
index 5f76d3de2..50b01b2ea 100644
--- a/cli/tests/integration/lsp_tests.rs
+++ b/cli/tests/integration/lsp_tests.rs
@@ -8041,6 +8041,49 @@ fn lsp_jupyter_diagnostics() {
   client.shutdown();
 }
 
+#[test]
+fn lsp_untitled_file_diagnostics() {
+  let context = TestContextBuilder::new().use_temp_cwd().build();
+  let mut client = context.new_lsp_command().build();
+  client.initialize_default();
+  let diagnostics = client.did_open(json!({
+    "textDocument": {
+      "uri": "untitled:///a/file.ts",
+      "languageId": "typescript",
+      "version": 1,
+      "text": "Deno.readTextFileSync(1234);",
+    },
+  }));
+  assert_eq!(
+    json!(diagnostics.all_messages()),
+    json!([
+      {
+        "uri": "untitled:///a/file.ts",
+        "diagnostics": [
+          {
+            "range": {
+              "start": {
+                "line": 0,
+                "character": 22,
+              },
+              "end": {
+                "line": 0,
+                "character": 26,
+              },
+            },
+            "severity": 1,
+            "code": 2345,
+            "source": "deno-ts",
+            "message": "Argument of type 'number' is not assignable to parameter of type 'string | URL'.",
+          },
+        ],
+        "version": 1,
+      },
+    ])
+  );
+  client.shutdown();
+}
+
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct PerformanceAverage {