1 files changed, 32 insertions, 0 deletions
diff --git a/testing/web-platform/tests/cookies/samesite/setcookie-lax.https.html b/testing/web-platform/tests/cookies/samesite/setcookie-lax.https.html
new file mode 100644
index 0000000000..f2094af693
--- /dev/null
+++ b/testing/web-platform/tests/cookies/samesite/setcookie-lax.https.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<meta charset="utf-8"/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script>
+  promise_test(async function(t) {
+    let w = window.open(SECURE_ORIGIN + "/cookies/samesite/resources/puppet.html");
+    await wait_for_message("READY", SECURE_ORIGIN);
+    let random = "" + Math.random();
+    w.postMessage({type: "set", value: random}, "*");
+    let e = await wait_for_message("set-complete", SECURE_ORIGIN)
+    assert_dom_cookie("samesite_strict", e.data.value, true);
+    assert_dom_cookie("samesite_lax", e.data.value, true);
+    assert_dom_cookie("samesite_none", e.data.value, true);
+    assert_dom_cookie("samesite_unspecified", e.data.value, true);
+    w.close();
+  }, "Same-site window should be able to set `SameSite=Lax` or `SameSite=Strict` cookies.");
+
+  promise_test(async function(t) {
+    let w = window.open(SECURE_CROSS_SITE_ORIGIN + "/cookies/samesite/resources/puppet.html");
+    await wait_for_message("READY", SECURE_CROSS_SITE_ORIGIN);
+    let random = "" + Math.random();
+    w.postMessage({type: "set", value: random}, "*");
+    let e = await wait_for_message("set-complete", SECURE_CROSS_SITE_ORIGIN);
+    assert_dom_cookie("samesite_strict", e.data.value, false);
+    assert_dom_cookie("samesite_lax", e.data.value, false);
+    assert_dom_cookie("samesite_none", e.data.value, true);
+    assert_dom_cookie("samesite_unspecified", e.data.value, false);
+    w.close();
+  }, "Cross-site window shouldn't be able to set `SameSite=Lax` or `SameSite=Strict` cookies.");
+</script>