1 files changed, 139 insertions, 0 deletions
diff --git a/xpcom/tests/unit/test_symlinks.js b/xpcom/tests/unit/test_symlinks.js
new file mode 100644
index 0000000000..8c0d25f792
--- /dev/null
+++ b/xpcom/tests/unit/test_symlinks.js
@@ -0,0 +1,139 @@
+const CWD = do_get_cwd();
+
+const DIR_TARGET = "target";
+const DIR_LINK = "link";
+const DIR_LINK_LINK = "link_link";
+const FILE_TARGET = "target.txt";
+const FILE_LINK = "link.txt";
+const FILE_LINK_LINK = "link_link.txt";
+
+const DOES_NOT_EXIST = "doesnotexist";
+const DANGLING_LINK = "dangling_link";
+const LOOP_LINK = "loop_link";
+
+const nsIFile = Ci.nsIFile;
+
+var process;
+function createSymLink(from, to) {
+  if (!process) {
+    var ln = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
+    ln.initWithPath("/bin/ln");
+
+    process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
+    process.init(ln);
+  }
+
+  const args = ["-s", from, to];
+  process.run(true, args, args.length);
+  Assert.equal(process.exitValue, 0);
+}
+
+function makeSymLink(from, toName, relative) {
+  var to = from.parent;
+  to.append(toName);
+
+  if (relative) {
+    createSymLink(from.leafName, to.path);
+  } else {
+    createSymLink(from.path, to.path);
+  }
+
+  Assert.ok(to.isSymlink());
+
+  print("---");
+  print(from.path);
+  print(to.path);
+  print(to.target);
+
+  if (from.leafName != DOES_NOT_EXIST && from.isSymlink()) {
+    // XXXjag wish I could set followLinks to false so we'd just get
+    // the symlink's direct target instead of the final target.
+    Assert.equal(from.target, to.target);
+  } else {
+    Assert.equal(from.path, to.target);
+  }
+
+  return to;
+}
+
+function setupTestDir(testDir, relative) {
+  var targetDir = testDir.clone();
+  targetDir.append(DIR_TARGET);
+
+  if (testDir.exists()) {
+    testDir.remove(true);
+  }
+  Assert.ok(!testDir.exists());
+
+  testDir.create(nsIFile.DIRECTORY_TYPE, 0o777);
+
+  targetDir.create(nsIFile.DIRECTORY_TYPE, 0o777);
+
+  var targetFile = testDir.clone();
+  targetFile.append(FILE_TARGET);
+  targetFile.create(nsIFile.NORMAL_FILE_TYPE, 0o666);
+
+  var imaginary = testDir.clone();
+  imaginary.append(DOES_NOT_EXIST);
+
+  var loop = testDir.clone();
+  loop.append(LOOP_LINK);
+
+  var dirLink = makeSymLink(targetDir, DIR_LINK, relative);
+  var fileLink = makeSymLink(targetFile, FILE_LINK, relative);
+
+  makeSymLink(dirLink, DIR_LINK_LINK, relative);
+  makeSymLink(fileLink, FILE_LINK_LINK, relative);
+
+  makeSymLink(imaginary, DANGLING_LINK, relative);
+
+  try {
+    makeSymLink(loop, LOOP_LINK, relative);
+    Assert.ok(false);
+  } catch (e) {}
+}
+
+function createSpaces(dirs, files, links) {
+  function longest(a, b) {
+    return a.length > b.length ? a : b;
+  }
+  return dirs.concat(files, links).reduce(longest, "").replace(/./g, " ");
+}
+
+function testSymLinks(testDir, relative) {
+  setupTestDir(testDir, relative);
+
+  const dirLinks = [DIR_LINK, DIR_LINK_LINK];
+  const fileLinks = [FILE_LINK, FILE_LINK_LINK];
+  const otherLinks = [DANGLING_LINK, LOOP_LINK];
+  const dirs = [DIR_TARGET].concat(dirLinks);
+  const files = [FILE_TARGET].concat(fileLinks);
+  const links = otherLinks.concat(dirLinks, fileLinks);
+
+  const spaces = createSpaces(dirs, files, links);
+  const bools = { false: " false", true: " true " };
+  print(spaces + " dir   file  symlink");
+  var dirEntries = testDir.directoryEntries;
+  while (dirEntries.hasMoreElements()) {
+    const file = dirEntries.nextFile;
+    const name = file.leafName;
+    print(
+      name +
+        spaces.substring(name.length) +
+        bools[file.isDirectory()] +
+        bools[file.isFile()] +
+        bools[file.isSymlink()]
+    );
+    Assert.equal(file.isDirectory(), dirs.includes(name));
+    Assert.equal(file.isFile(), files.includes(name));
+    Assert.equal(file.isSymlink(), links.includes(name));
+  }
+}
+
+function run_test() {
+  var testDir = CWD;
+  testDir.append("test_symlinks");
+
+  testSymLinks(testDir, false);
+  testSymLinks(testDir, true);
+}