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<!DOCTYPE html>
<title>Test the key value store</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
promise_test(async () => {
const key = token();
const test_value = "TESTVALUE";
let server_value = await readValueFromServer(key);
assert_false(server_value.status,
"The server returns a sentinel value when requesting a value " +
"that the stash does not have");
server_value = await readValueFromServer(key);
assert_false(server_value.status,
"Requesting a not-set value twice is idempotent");
writeValueToServer(key, "");
server_value = await nextValueFromServer(key);
assert_equals(server_value, "",
"The server correctly identifies that an empty string was " +
"set, and returns it, and not the sentinel value");
writeValueToServer(key, test_value);
server_value = await nextValueFromServer(key);
assert_equals(server_value, test_value,
"The server correctly sets and returns non-empty strings");
writeValueToServer(key, "");
server_value = await nextValueFromServer(key);
assert_equals(server_value, "",
"The server correctly identifies empty strings after dealing " +
"with non-empty-string values");
}, "Test the key-value store, specifically with empty strings");
</script>
</body>
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