1 files changed, 80 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_clipboard_pastefile.js b/browser/base/content/test/general/browser_clipboard_pastefile.js
new file mode 100644
index 0000000000..73a62938b2
--- /dev/null
+++ b/browser/base/content/test/general/browser_clipboard_pastefile.js
@@ -0,0 +1,80 @@
+// This test is used to check that pasting files removes all non-file data from
+// event.clipboardData.
+
+add_task(async function() {
+  var input = document.createElement("input");
+  document.documentElement.appendChild(input);
+
+  input.focus();
+  input.value = "Text";
+  input.select();
+
+  await new Promise((resolve, reject) => {
+    input.addEventListener(
+      "copy",
+      function(event) {
+        event.clipboardData.setData("text/plain", "Alternate");
+        // For this test, it doesn't matter that the file isn't actually a file.
+        event.clipboardData.setData("application/x-moz-file", "Sample");
+        event.preventDefault();
+        resolve();
+      },
+      { capture: true, once: true }
+    );
+
+    EventUtils.synthesizeKey("c", { accelKey: true });
+  });
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.com/browser/browser/base/content/test/general/clipboard_pastefile.html"
+  );
+  let browser = tab.linkedBrowser;
+
+  await SpecialPowers.spawn(browser, [], async function(arg) {
+    content.document.getElementById("input").focus();
+  });
+
+  await BrowserTestUtils.synthesizeKey("v", { accelKey: true }, browser);
+
+  let output = await SpecialPowers.spawn(browser, [], async function(arg) {
+    return content.document.getElementById("output").textContent;
+  });
+  is(output, "Passed", "Paste file");
+
+  input.focus();
+
+  await new Promise((resolve, reject) => {
+    input.addEventListener(
+      "paste",
+      function(event) {
+        let dt = event.clipboardData;
+        is(dt.types.length, 3, "number of types");
+        ok(dt.types.includes("text/plain"), "text/plain exists in types");
+        ok(
+          dt.mozTypesAt(0).contains("text/plain"),
+          "text/plain exists in mozTypesAt"
+        );
+        is(
+          dt.getData("text/plain"),
+          "Alternate",
+          "text/plain returned in getData"
+        );
+        is(
+          dt.mozGetDataAt("text/plain", 0),
+          "Alternate",
+          "text/plain returned in mozGetDataAt"
+        );
+
+        resolve();
+      },
+      { capture: true, once: true }
+    );
+
+    EventUtils.synthesizeKey("v", { accelKey: true });
+  });
+
+  input.remove();
+
+  BrowserTestUtils.removeTab(tab);
+});