fix(tsc): more informative diagnostic when `Deno` does not exist (#19825)

Also improved the diagnostic when using something like `Deno.openKv` and
it doesn't exist.

2 files changed, 18 insertions, 0 deletions

diff --git a/cli/tests/testdata/check/deno_unstable_not_found/main.out b/cli/tests/testdata/check/deno_unstable_not_found/main.out
new file mode 100644
index 000000000..dfe3cf317
--- /dev/null
+++ b/cli/tests/testdata/check/deno_unstable_not_found/main.out
@@ -0,0 +1,16 @@
+error: TS2551 [ERROR]: Property 'openKv' does not exist on type 'typeof Deno'. Did you mean 'open'? 'Deno.openKv' is an unstable API. Did you forget to run with the '--unstable' flag, or did you mean 'open'? If not, try changing the 'lib' compiler option to include 'deno.unstable' or add a triple-slash directive to your entrypoint: /// <reference lib="deno.unstable" />
+Deno.openKv;
+     ~~~~~~
+    at file:///[WILDCARD]/deno_unstable_not_found/main.ts:1:6
+
+    'open' is declared here.
+      export function open(
+                      ~~~~
+        at asset:///lib.deno.ns.d.ts:1667:19
+
+TS2339 [ERROR]: Property 'createHttpClient' does not exist on type 'typeof Deno'. 'Deno.createHttpClient' is an unstable API. Did you forget to run with the '--unstable' flag? If not, try changing the 'lib' compiler option to include 'deno.unstable' or add a triple-slash directive to your entrypoint: /// <reference lib="deno.unstable" />
+Deno.createHttpClient;
+     ~~~~~~~~~~~~~~~~
+    at file:///[WILDCARD]/deno_unstable_not_found/main.ts:2:6
+
+Found 2 errors.
diff --git a/cli/tests/testdata/check/deno_unstable_not_found/main.ts b/cli/tests/testdata/check/deno_unstable_not_found/main.ts
new file mode 100644
index 000000000..6661bd205
--- /dev/null
+++ b/cli/tests/testdata/check/deno_unstable_not_found/main.ts
@@ -0,0 +1,2 @@
+Deno.openKv;
+Deno.createHttpClient;