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denoland-deno/deno2/js/mock_runtime.js

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// A simple runtime that doesn't involve typescript or protobufs to test
// libdeno. Invoked by mock_runtime_test.cc
const window = eval("this");
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function assert(cond) {
if (!cond) throw Error("mock_runtime.js assert failed");
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}
function typedArrayToArrayBuffer(ta) {
return ta.buffer.slice(ta.byteOffset, ta.byteOffset + ta.byteLength);
}
function CanCallFunction() {
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denoPrint("Hello world from foo");
return "foo";
}
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// This object is created to test snapshotting.
// See DeserializeInternalFieldsCallback and SerializeInternalFieldsCallback.
const snapshotted = new Uint8Array([1, 3, 3, 7]);
function TypedArraySnapshots() {
assert(snapshotted[0] === 1);
assert(snapshotted[1] === 3);
assert(snapshotted[2] === 3);
assert(snapshotted[3] === 7);
}
function PubSuccess() {
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denoSub((channel, msg) => {
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assert(channel === "PubSuccess");
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denoPrint("PubSuccess: ok");
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});
}
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function PubByteLength() {
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denoSub((channel, msg) => {
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assert(channel === "PubByteLength");
assert(msg instanceof ArrayBuffer);
assert(msg.byteLength === 3);
});
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}
function SubReturnEmpty() {
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const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
const ab = typedArrayToArrayBuffer(ui8);
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let r = denoPub("SubReturnEmpty", ab);
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assert(r == null);
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r = denoPub("SubReturnEmpty", ab);
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assert(r == null);
}
function SubReturnBar() {
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const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
const ab = typedArrayToArrayBuffer(ui8);
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const r = denoPub("SubReturnBar", ab);
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assert(r instanceof ArrayBuffer);
assert(r.byteLength === 3);
const rui8 = new Uint8Array(r);
const rstr = String.fromCharCode(...rui8);
assert(rstr === "bar");
}
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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));
}