5 files changed, 37 insertions, 0 deletions
diff --git a/tests/specs/workspaces/vendor/__test__.jsonc b/tests/specs/workspaces/vendor/__test__.jsonc
new file mode 100644
index 000000000..cd44b361b
--- /dev/null
+++ b/tests/specs/workspaces/vendor/__test__.jsonc
@@ -0,0 +1,13 @@
+{
+  "tempDir": true,
+  "steps": [{
+    "args": "run --quiet package-a/mod.ts",
+    "output": "3\n"
+  }, {
+    "args": "run --allow-write=. --allow-read=. modify_vendor.ts",
+    "output": "[WILDLINE]"
+  }, {
+    "args": "run --quiet package-a/mod.ts",
+    "output": "4\n"
+  }]
+}
diff --git a/tests/specs/workspaces/vendor/deno.json b/tests/specs/workspaces/vendor/deno.json
new file mode 100644
index 000000000..62bf7dff9
--- /dev/null
+++ b/tests/specs/workspaces/vendor/deno.json
@@ -0,0 +1,9 @@
+{
+  "vendor": true,
+  "workspace": [
+    "package-a"
+  ],
+  "imports": {
+    "@denotest/add": "jsr:@denotest/add"
+  }
+}
diff --git a/tests/specs/workspaces/vendor/modify_vendor.ts b/tests/specs/workspaces/vendor/modify_vendor.ts
new file mode 100644
index 000000000..3b6dafe14
--- /dev/null
+++ b/tests/specs/workspaces/vendor/modify_vendor.ts
@@ -0,0 +1,7 @@
+Deno.writeTextFileSync(
+  "./vendor/http_127.0.0.1_4250/@denotest/add/1.0.0/mod.ts",
+  `export function add(a: number, b: number): number {
+  return a + b + 1; // evil add
+}
+`,
+);
diff --git a/tests/specs/workspaces/vendor/package-a/deno.json b/tests/specs/workspaces/vendor/package-a/deno.json
new file mode 100644
index 000000000..fe4300ad6
--- /dev/null
+++ b/tests/specs/workspaces/vendor/package-a/deno.json
@@ -0,0 +1,5 @@
+{
+  "name": "@scope/pkg",
+  "version": "1.0.0",
+  "exports": "./mod.ts"
+}
diff --git a/tests/specs/workspaces/vendor/package-a/mod.ts b/tests/specs/workspaces/vendor/package-a/mod.ts
new file mode 100644
index 000000000..1ca631410
--- /dev/null
+++ b/tests/specs/workspaces/vendor/package-a/mod.ts
@@ -0,0 +1,3 @@
+import { add } from "@denotest/add";
+
+console.log(add(1, 2));