chore: deprecate test itests (#25512)

This PR is part of #22907

---------

Signed-off-by: HasanAlrimawi <141642411+HasanAlrimawi@users.noreply.github.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

3 files changed, 33 insertions, 0 deletions

diff --git a/tests/specs/test/only/__test__.jsonc b/tests/specs/test/only/__test__.jsonc
new file mode 100644
index 000000000..2c4ae3868
--- /dev/null
+++ b/tests/specs/test/only/__test__.jsonc
@@ -0,0 +1,5 @@
+{
+  "args": "test main.ts",
+  "exitCode": 1,
+  "output": "main.out"
+}
diff --git a/tests/specs/test/only/main.out b/tests/specs/test/only/main.out
new file mode 100644
index 000000000..e1c745bcd
--- /dev/null
+++ b/tests/specs/test/only/main.out
@@ -0,0 +1,8 @@
+Check [WILDCARD]/main.ts
+running 2 tests from ./main.ts
+only ... ok ([WILDCARD])
+only2 ... ok ([WILDCARD])
+
+ok | 2 passed | 0 failed | 2 filtered out ([WILDCARD])
+
+error: Test failed because the "only" option was used
diff --git a/tests/specs/test/only/main.ts b/tests/specs/test/only/main.ts
new file mode 100644
index 000000000..26b4cd425
--- /dev/null
+++ b/tests/specs/test/only/main.ts
@@ -0,0 +1,20 @@
+Deno.test({
+  name: "before",
+  fn() {},
+});
+
+Deno.test({
+  only: true,
+  name: "only",
+  fn() {},
+});
+
+Deno.test.only({
+  name: "only2",
+  fn() {},
+});
+
+Deno.test({
+  name: "after",
+  fn() {},
+});