idbcursor-advance.htm
<!DOCTYPE html>
<title>IDBCursor.advance()</title>
<link rel="author" href="mailto:odinho@opera.com" title="Odin Hørthe Omdal">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support.js"></script>
<script>
var db, open;
setup(function() {
open = indexedDB.open("testdb-" + new Date().getTime());
open.onupgradeneeded = function(e) {
db = e.target.result;
var objStore = db.createObjectStore("test");
objStore.createIndex("index", "");
objStore.add("cupcake", 5);
objStore.add("pancake", 3); // Yes, it is intended
objStore.add("pie", 1);
objStore.add("pie", 4);
objStore.add("taco", 2);
};
},
{ explicit_done: true });
open.onsuccess = function() {
async_test(document.title + " - advances").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index").openCursor();
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 3, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "cupcake");
assert_equals(cursor.primaryKey, 5);
break;
case 1:
assert_equals(cursor.value, "pie");
assert_equals(cursor.primaryKey, 1);
break;
case 2:
assert_equals(cursor.value, "taco");
assert_equals(cursor.primaryKey, 2);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(2);
});
rq.onerror = fail(this, "unexpected error")
});
async_test(document.title + " - advances backwards").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index").openCursor(null, "prev");
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 3, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "taco");
assert_equals(cursor.primaryKey, 2);
break;
case 1:
assert_equals(cursor.value, "pie");
assert_equals(cursor.primaryKey, 1);
break;
case 2:
assert_equals(cursor.value, "cupcake");
assert_equals(cursor.primaryKey, 5);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(2);
});
rq.onerror = fail(this, "unexpected error")
});
async_test(document.title + " - skip far forward").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index")
.openCursor();
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 1, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "cupcake");
assert_equals(cursor.primaryKey, 5);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(100000);
});
rq.onerror = fail(this, "unexpected error")
});
async_test(document.title + " - within range").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index")
.openCursor(IDBKeyRange.lowerBound("cupcake", true));
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 2, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "pancake");
assert_equals(cursor.primaryKey, 3);
break;
case 1:
assert_equals(cursor.value, "pie");
assert_equals(cursor.primaryKey, 4);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(2);
});
rq.onerror = fail(this, "unexpected error")
});
async_test(document.title + " - within single key range").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index")
.openCursor("pancake");
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 1, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "pancake");
assert_equals(cursor.primaryKey, 3);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(1);
});
rq.onerror = fail(this, "unexpected error")
});
async_test(document.title + " - within single key range, with several results").step(function(e) {
var count = 0;
var rq = db.transaction("test").objectStore("test").index("index")
.openCursor("pie");
rq.onsuccess = this.step_func(function(e) {
if (!e.target.result) {
assert_equals(count, 2, "count");
this.done();
return;
}
var cursor = e.target.result;
switch(count) {
case 0:
assert_equals(cursor.value, "pie");
assert_equals(cursor.primaryKey, 1);
break;
case 1:
assert_equals(cursor.value, "pie");
assert_equals(cursor.primaryKey, 4);
break;
default:
assert_unreached("Unexpected count: " + count);
}
count++;
cursor.advance(1);
});
rq.onerror = fail(this, "unexpected error")
});
// Stop blocking the testing system from hereon
done();
}
</script>
<div id="log"></div>
