Add m-esr52 at 52.6.0

1 files changed, 56 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/basic/withSourceHook.js b/js/src/jit-test/tests/basic/withSourceHook.js
new file mode 100644
index 000000000..460c4efe1
--- /dev/null
+++ b/js/src/jit-test/tests/basic/withSourceHook.js
@@ -0,0 +1,56 @@
+// Check that withSourceHook passes URLs, propagates exceptions, and
+// properly restores the original source hooks.
+
+load(libdir + 'asserts.js');
+
+// withSourceHook isn't defined if you pass the shell the --fuzzing-safe
+// option. Skip this test silently, to avoid spurious failures.
+if (typeof withSourceHook != 'function')
+  quit(0);
+
+var log = '';
+
+// Establish an outermost source hook.
+withSourceHook(function (url) {
+  log += 'o';
+  assertEq(url, 'outer');
+  return '(function outer() { 3; })';
+}, function () {
+  log += 'O';
+  // Verify that withSourceHook propagates exceptions thrown by source hooks.
+  assertThrowsValue(function () {
+    // Establish a source hook that throws.
+    withSourceHook(function (url) {
+      log += 'm';
+      assertEq(url, 'middle');
+      throw 'borborygmus'; // middle
+    }, function () {
+      log += 'M';
+      // Establish an innermost source hook that does not throw,
+      // and verify that it is in force.
+      assertEq(withSourceHook(function (url) {
+                                log += 'i';
+                                assertEq(url, 'inner');
+                                return '(function inner() { 1; })';
+                              }, function () {
+                                log += 'I';
+                                return evaluate('(function inner() { 2; })',
+                                                { fileName: 'inner', sourceIsLazy: true })
+                                       .toSource();
+                              }),
+               '(function inner() { 1; })');
+      // Verify that the source hook that throws has been reinstated.
+      evaluate('(function middle() { })',
+               { fileName: 'middle', sourceIsLazy: true })
+      .toSource();
+    });
+  }, 'borborygmus');
+
+  // Verify that the outermost source hook has been restored.
+  assertEq(evaluate('(function outer() { 4; })',
+                    { fileName: 'outer', sourceIsLazy: true })
+           .toSource(),
+           '(function outer() { 3; })');
+});
+
+assertEq(log, 'OMIimo');