fix(check): include dts files in tsc roots (#18026)

4 files changed, 7 insertions, 2 deletions

diff --git a/cli/tests/testdata/check/check_dts.d.ts b/cli/tests/testdata/check/check_dts.d.ts
new file mode 100644
index 000000000..9cf60f063
--- /dev/null
+++ b/cli/tests/testdata/check/check_dts.d.ts
@@ -0,0 +1,2 @@
+// TS1039 [ERROR]: Initializers are not allowed in ambient contexts.
+export const a: string = Deno.version.deno;
diff --git a/cli/tests/testdata/check/check_dts.out b/cli/tests/testdata/check/check_dts.out
new file mode 100644
index 000000000..e7ff9a009
--- /dev/null
+++ b/cli/tests/testdata/check/check_dts.out
@@ -0,0 +1,4 @@
+error: TS1039 [ERROR]: Initializers are not allowed in ambient contexts.
+export const a: string = Deno.version.deno;
+                         ~~~~~~~~~~~~~~~~~
+    at file:///[WILDCARD]/check_dts.d.ts:2:26
diff --git a/cli/tests/testdata/test/doc.out b/cli/tests/testdata/test/doc.out
index 1766912e5..cd8bbb620 100644
--- a/cli/tests/testdata/test/doc.out
+++ b/cli/tests/testdata/test/doc.out
@@ -1,4 +1,3 @@
-Check [WILDCARD]/doc.ts$2-5.ts
 Check [WILDCARD]/doc.ts$6-9.js
 Check [WILDCARD]/doc.ts$10-13.jsx
 Check [WILDCARD]/doc.ts$14-17.ts
diff --git a/cli/tests/testdata/test/doc.ts b/cli/tests/testdata/test/doc.ts
index 52fe6bdf0..519479fc5 100644
--- a/cli/tests/testdata/test/doc.ts
+++ b/cli/tests/testdata/test/doc.ts
@@ -27,7 +27,7 @@
  */
 
 /**
- * ```
+ * ```ts
  * import { check } from "./doc.ts";
  *
  * console.assert(check() == 42);