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+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Writer starvation</title>
+<link rel="author" href="mailto:odinho@opera.com" title="Odin Hørthe Omdal">
+<meta name=timeout content=long>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=resources/support.js></script>
+
+<script>
+ var db, read_request_count = 0, read_success_count = 0;
+ var write_request_count = 0, write_success_count = 0;
+ var RQ_COUNT = 25;
+
+ var open_rq = createdb(async_test(undefined));
+ open_rq.onupgradeneeded = function(e) {
+ db = e.target.result;
+ db.createObjectStore("s")
+ .add("1", 1);
+ }
+
+ open_rq.onsuccess = function(e) {
+ var i = 0, continue_reading = true;
+
+ /* Pre-fill some read requests */
+ for (i = 0; i < RQ_COUNT; i++)
+ {
+ read_request_count++;
+
+ db.transaction("s", "readonly", {durability: 'relaxed'})
+ .objectStore("s")
+ .get(1)
+ .onsuccess = this.step_func(function(e) {
+ read_success_count++;
+ assert_equals(e.target.transaction.mode, "readonly");
+ });
+ }
+
+ this.step(loop);
+
+ function loop() {
+ read_request_count++;
+
+ db.transaction("s", "readonly", {durability: 'relaxed'})
+ .objectStore("s")
+ .get(1)
+ .onsuccess = this.step_func(function(e)
+ {
+ read_success_count++;
+ assert_equals(e.target.transaction.mode, "readonly");
+
+ if (read_success_count >= RQ_COUNT && write_request_count == 0)
+ {
+ write_request_count++;
+
+ db.transaction("s", "readwrite", {durability: 'relaxed'})
+ .objectStore("s")
+ .add("written", read_request_count)
+ .onsuccess = this.step_func(function(e)
+ {
+ write_success_count++;
+ assert_equals(e.target.transaction.mode, "readwrite");
+ assert_equals(e.target.result, read_success_count,
+ "write cb came before later read cb's")
+ });
+
+ /* Reads done after the write */
+ for (i = 0; i < 5; i++)
+ {
+ read_request_count++;
+
+ db.transaction("s", "readonly", {durability: 'relaxed'})
+ .objectStore("s")
+ .get(1)
+ .onsuccess = this.step_func(function(e)
+ {
+ read_success_count++;
+ });
+ }
+ }
+ });
+
+ if (read_success_count < RQ_COUNT + 5)
+ step_timeout(this.step_func(loop), write_request_count ? 1000 : 100);
+ else
+ // This is merely a "nice" hack to run finish after the last request is done
+ db.transaction("s", "readonly", {durability: 'relaxed'})
+ .objectStore("s")
+ .count()
+ .onsuccess = this.step_func(function()
+ {
+ step_timeout(this.step_func(finish), 100);
+ });
+ }
+ }
+
+
+function finish() {
+ assert_equals(read_request_count, read_success_count, "read counts");
+ assert_equals(write_request_count, write_success_count, "write counts");
+ this.done();
+}
+</script>
+
+<div id=log></div>