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denoland-deno/deno2/js/mock_runtime.js
2018-06-11 22:51:11 +02:00

58 lines
1.5 KiB
JavaScript

// A simple runtime that doesn't involve typescript or protobufs to test
// libdeno. Invoked by mock_runtime_test.cc
const window = eval("this");
function assert(cond) {
if (!cond) throw Error("mock_runtime.js assert failed");
}
function typedArrayToArrayBuffer(ta) {
return ta.buffer.slice(ta.byteOffset, ta.byteOffset + ta.byteLength);
}
function CanCallFunction() {
denoPrint("Hello world from foo");
return "foo";
}
function PubSuccess() {
denoSub((channel, msg) => {
assert(channel === "PubSuccess");
denoPrint("PubSuccess: ok");
});
}
function PubByteLength() {
denoSub((channel, msg) => {
assert(channel === "PubByteLength");
assert(msg instanceof ArrayBuffer);
assert(msg.byteLength === 3);
});
}
function SubReturnEmpty() {
const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
const ab = typedArrayToArrayBuffer(ui8);
let r = denoPub("SubReturnEmpty", ab);
assert(r == null);
r = denoPub("SubReturnEmpty", ab);
assert(r == null);
}
function SubReturnBar() {
const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
const ab = typedArrayToArrayBuffer(ui8);
const r = denoPub("SubReturnBar", ab);
assert(r instanceof ArrayBuffer);
assert(r.byteLength === 3);
const rui8 = new Uint8Array(r);
const rstr = String.fromCharCode(...rui8);
assert(rstr === "bar");
}
function DoubleSubFails() {
// denoSub is an internal function and should only be called once from the
// runtime.
denoSub((channel, msg) => assert(false));
denoSub((channel, msg) => assert(false));
}