1 files changed, 138 insertions, 0 deletions
diff --git a/toolkit/xre/test/test_install_hash.js b/toolkit/xre/test/test_install_hash.js
new file mode 100644
index 0000000000..75154b27bd
--- /dev/null
+++ b/toolkit/xre/test/test_install_hash.js
@@ -0,0 +1,138 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * This runs the xpcshell binary with different cases for the executable path.
+ * They should all result in the same installation hash.
+ */
+
+const { Subprocess } = ChromeUtils.importESModule(
+  "resource://gre/modules/Subprocess.sys.mjs"
+);
+
+const XRE = Cc["@mozilla.org/xre/directory-provider;1"].getService(
+  Ci.nsIXREDirProvider
+);
+const HASH = XRE.getInstallHash(false);
+const EXE = Services.dirsvc.get("XREExeF", Ci.nsIFile);
+const SCRIPT = do_get_file("show_hash.js", false);
+
+async function getHash(bin) {
+  try {
+    let proc = await Subprocess.call({
+      command: bin.path,
+      arguments: [SCRIPT.path],
+    });
+
+    let result = "";
+    let string;
+    while ((string = await proc.stdout.readString())) {
+      result += string;
+    }
+
+    return result.trim();
+  } catch (e) {
+    if (e.errorCode == Subprocess.ERROR_BAD_EXECUTABLE) {
+      return null;
+    }
+    throw e;
+  }
+}
+
+// Walks through a path's entries and calls a mutator function to change the
+// case of each.
+function mutatePath(path, mutator) {
+  let parts = [];
+  let index = 0;
+  while (path.parent != null) {
+    parts.push(mutator(path.leafName, index++));
+    path = path.parent;
+  }
+
+  while (parts.length) {
+    path.append(parts.pop());
+  }
+
+  return path;
+}
+
+// Counts how many path parts a mutator will be called for.
+function countParts(path) {
+  let index = 0;
+  while (path.parent != null) {
+    path = path.parent;
+    index++;
+  }
+  return index;
+}
+
+add_task(async function testSameBinary() {
+  // Running with the same binary path should definitely work and give the same
+  // hash.
+  Assert.equal(
+    await getHash(EXE),
+    HASH,
+    "Should have the same hash when running the same binary."
+  );
+});
+
+add_task(async function testUpperCase() {
+  let upper = mutatePath(EXE, p => p.toLocaleUpperCase());
+  let hash = await getHash(upper);
+
+  // We may not get a hash if any part of the filesystem is case sensitive.
+  if (hash) {
+    Assert.equal(
+      hash,
+      HASH,
+      `Should have seen the same hash from ${upper.path}.`
+    );
+  }
+});
+
+add_task(async function testLowerCase() {
+  let lower = mutatePath(EXE, p => p.toLocaleLowerCase());
+  let hash = await getHash(lower);
+
+  // We may not get a hash if any part of the filesystem is case sensitive.
+  if (hash) {
+    Assert.equal(
+      hash,
+      HASH,
+      `Should have seen the same hash from ${lower.path}.`
+    );
+  }
+});
+
+add_task(async function testEachPart() {
+  // We need to check the case where only some of the directories in the path
+  // are case insensitive.
+
+  let count = countParts(EXE);
+  for (let i = 0; i < count; i++) {
+    let upper = mutatePath(EXE, (p, index) =>
+      index == i ? p.toLocaleUpperCase() : p
+    );
+    let lower = mutatePath(EXE, (p, index) =>
+      index == i ? p.toLocaleLowerCase() : p
+    );
+
+    let upperHash = await getHash(upper);
+    if (upperHash) {
+      Assert.equal(
+        upperHash,
+        HASH,
+        `Should have seen the same hash from ${upper.path}.`
+      );
+    }
+
+    let lowerHash = await getHash(lower);
+    if (lowerHash) {
+      Assert.equal(
+        lowerHash,
+        HASH,
+        `Should have seen the same hash from ${lower.path}.`
+      );
+    }
+  }
+});