1 files changed, 131 insertions, 0 deletions
diff --git a/browser/components/sessionstore/test/browser_formdata_max_size.js b/browser/components/sessionstore/test/browser_formdata_max_size.js
new file mode 100644
index 0000000000..00b49985e3
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_formdata_max_size.js
@@ -0,0 +1,131 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const URL =
+  "http://mochi.test:8888/browser/browser/components/" +
+  "sessionstore/test/browser_formdata_sample.html";
+
+const SHORT_VALUE = "abc";
+const LONG_VALUE = "abcdef";
+
+add_task(async function test_form_limit() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      // "browser.sessionstore.dom_form_limit" limits the length of values in
+      // forms to 5. Here we have that SHORT_VALUE is less than 5 and
+      // LONG_VALUE is greater than 5.
+      ["browser.sessionstore.dom_form_limit", 5],
+      ["browser.sessionstore.debug.no_auto_updates", true],
+    ],
+  });
+
+  await BrowserTestUtils.withNewTab({ gBrowser, url: URL }, async browser => {
+    await setPropertyOfFormField(browser, "#txt", "value", SHORT_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    let tab = gBrowser.getTabForBrowser(browser);
+    let state = JSON.parse(ss.getTabState(tab));
+    is(
+      state.formdata.id.txt,
+      SHORT_VALUE,
+      "values shorter than browser.sessionstore.dom_form_limit is ok."
+    );
+
+    await setPropertyOfFormField(browser, "#txt", "value", LONG_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    state = JSON.parse(ss.getTabState(tab));
+    ok(
+      !state?.formdata?.id?.txt,
+      "values shorter than browser.sessionstore.dom_form_limit isn't ok."
+    );
+  });
+
+  await SpecialPowers.popPrefEnv();
+});
+
+add_task(async function test_form_max_limit() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      // "browser.sessionstore.dom_form_max_limit" limits the total length
+      // of values AND length id/xpath collected from a form. Here we have
+      // that SHORT_VALUE + 'txt' is less than 7 and LONG_VALUE + 'txt' is
+      // greater than 7.
+      ["browser.sessionstore.dom_form_max_limit", 7],
+      ["browser.sessionstore.debug.no_auto_updates", true],
+    ],
+  });
+
+  await BrowserTestUtils.withNewTab({ gBrowser, url: URL }, async browser => {
+    await setPropertyOfFormField(browser, "#txt", "value", SHORT_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    let tab = gBrowser.getTabForBrowser(browser);
+    let state = JSON.parse(ss.getTabState(tab));
+    is(
+      state.formdata.id.txt,
+      SHORT_VALUE,
+      "total length shorter than browser.sessionstore.dom_form_max_limit is ok."
+    );
+
+    await setPropertyOfFormField(browser, "#txt", "value", LONG_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    state = JSON.parse(ss.getTabState(tab));
+    is(
+      state.formdata.id.txt,
+      SHORT_VALUE,
+      "total length shorter than browser.sessionstore.dom_form_max_limit isn't ok."
+    );
+  });
+
+  await SpecialPowers.popPrefEnv();
+});
+
+add_task(async function test_form_max_limit_many_fields() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      // "browser.sessionstore.dom_form_max_limit" limits the total length
+      // of values AND length id/xpath collected from a form. Here we have
+      // that SHORT_VALUE * 2 + 'text' + 'txt' is less than 15 and LONG_VALUE
+      // + SHORT_VALUE + 'text' + 'txt' is greater than 15.
+      ["browser.sessionstore.dom_form_max_limit", 15],
+      ["browser.sessionstore.debug.no_auto_updates", true],
+    ],
+  });
+
+  await BrowserTestUtils.withNewTab({ gBrowser, url: URL }, async browser => {
+    await SpecialPowers.spawn(browser, [], () => {
+      let element = content.document.createElement("input");
+      element.id = "text";
+      element.type = "text";
+      content.document.body.appendChild(element);
+    });
+
+    await setPropertyOfFormField(browser, "#txt", "value", SHORT_VALUE);
+    await setPropertyOfFormField(browser, "#text", "value", SHORT_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    let tab = gBrowser.getTabForBrowser(browser);
+    let state = JSON.parse(ss.getTabState(tab));
+    is(
+      state.formdata.id.txt,
+      SHORT_VALUE,
+      "total length shorter than browser.sessionstore.dom_form_max_limit is ok."
+    );
+
+    await setPropertyOfFormField(browser, "#txt", "value", LONG_VALUE);
+    await TabStateFlusher.flush(browser);
+
+    state = JSON.parse(ss.getTabState(tab));
+    is(
+      state.formdata.id.txt,
+      SHORT_VALUE,
+      "total length shorter than browser.sessionstore.dom_form_max_limit isn't ok."
+    );
+  });
+
+  await SpecialPowers.popPrefEnv();
+});