1 files changed, 60 insertions, 0 deletions
diff --git a/modules/libjar/zipwriter/test/unit/test_editexisting.js b/modules/libjar/zipwriter/test/unit/test_editexisting.js
new file mode 100644
index 0000000000..c58447260e
--- /dev/null
+++ b/modules/libjar/zipwriter/test/unit/test_editexisting.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Values taken from using zipinfo to list the test.zip contents
+var TESTS = [
+  {
+    name: "test.txt",
+    size: 232,
+    crc: 0x0373ac26,
+    time: Date.UTC(2007, 4, 1, 20, 44, 55),
+  },
+  {
+    name: "test.png",
+    size: 3402,
+    crc: 0x504a5c30,
+    time: Date.UTC(2007, 4, 1, 20, 49, 39),
+  },
+];
+var BADENTRY = "unknown.txt";
+
+function run_test() {
+  // Copy our test zip to the tmp dir so we can modify it
+  var testzip = do_get_file(DATA_DIR + "test.zip");
+  testzip.copyTo(tmpDir, tmpFile.leafName);
+
+  Assert.ok(tmpFile.exists());
+
+  zipW.open(tmpFile, PR_RDWR);
+
+  for (let i = 0; i < TESTS.length; i++) {
+    Assert.ok(zipW.hasEntry(TESTS[i].name));
+    var entry = zipW.getEntry(TESTS[i].name);
+    Assert.ok(entry != null);
+
+    Assert.equal(entry.realSize, TESTS[i].size);
+    Assert.equal(entry.CRC32, TESTS[i].crc);
+    Assert.equal(entry.lastModifiedTime / PR_USEC_PER_MSEC, TESTS[i].time);
+  }
+
+  try {
+    zipW.removeEntry(BADENTRY, false);
+    do_throw("shouldn't be able to remove an entry that doesn't exist");
+  } catch (e) {
+    Assert.equal(e.result, Cr.NS_ERROR_FILE_NOT_FOUND);
+  }
+
+  for (let i = 0; i < TESTS.length; i++) {
+    zipW.removeEntry(TESTS[i].name, false);
+  }
+
+  zipW.close();
+
+  // Certain platforms cache the file size so get a fresh file to check.
+  tmpFile = tmpFile.clone();
+
+  // Empty zip file should just be the end of central directory marker
+  Assert.equal(tmpFile.fileSize, ZIP_EOCDR_HEADER_SIZE);
+}