feat(lsp): add asset cache regression test

When we migrated away from all the locks, there was a regression that
was not caught immediately. The tsc::get_asset() would attempt to modify
the snapshot, but the problem was that the snapshot was a .clone() of
the inner language server's assets, which meant that modifications to
that where lost. When we then attempted to do a hover on those assets,
the inner language servers assets didn't have the retrieved asset, and
therefore would throw an error.

1 files changed, 14 insertions, 0 deletions

diff --git a/cli/tests/lsp/hover_request_asset_02.json b/cli/tests/lsp/hover_request_asset_02.json
new file mode 100644
index 000000000..30f404709
--- /dev/null
+++ b/cli/tests/lsp/hover_request_asset_02.json
@@ -0,0 +1,14 @@
+{
+  "jsonrpc": "2.0",
+  "id": 4,
+  "method": "textDocument/hover",
+  "params": {
+    "textDocument": {
+      "uri": "deno:/asset//lib.es2015.symbol.wellknown.d.ts"
+    },
+    "position": {
+      "line": 109,
+      "character": 13
+    }
+  }
+}