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denoland-deno/js/test_util.ts

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2019-01-21 14:03:30 -05:00
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
//
// We want to test many ops in deno which have different behavior depending on
// the permissions set. These tests can specify which permissions they expect,
// which appends a special string like "permW1N0" to the end of the test name.
// Here we run several copies of deno with different permissions, filtering the
// tests by the special string. permW0N0 means allow-write but not allow-net.
// See tools/unit_tests.py for more details.
import * as testing from "./deps/https/deno.land/std/testing/mod.ts";
import {
assert,
assertEquals
} from "./deps/https/deno.land/std/testing/asserts.ts";
export {
assert,
assertEquals
} from "./deps/https/deno.land/std/testing/asserts.ts";
// testing.setFilter must be run before any tests are defined.
testing.setFilter(Deno.args[1]);
interface DenoPermissions {
read?: boolean;
write?: boolean;
net?: boolean;
env?: boolean;
run?: boolean;
}
function permToString(perms: DenoPermissions): string {
const r = perms.read ? 1 : 0;
const w = perms.write ? 1 : 0;
const n = perms.net ? 1 : 0;
const e = perms.env ? 1 : 0;
const u = perms.run ? 1 : 0;
return `permR${r}W${w}N${n}E${e}U${u}`;
}
function permFromString(s: string): DenoPermissions {
const re = /^permR([01])W([01])N([01])E([01])U([01])$/;
const found = s.match(re);
if (!found) {
throw Error("Not a permission string");
}
return {
read: Boolean(Number(found[1])),
write: Boolean(Number(found[2])),
net: Boolean(Number(found[3])),
env: Boolean(Number(found[4])),
run: Boolean(Number(found[5]))
};
}
export function testPerm(
perms: DenoPermissions,
fn: testing.TestFunction
): void {
const name = `${fn.name}_${permToString(perms)}`;
testing.test({ fn, name });
}
export function test(fn: testing.TestFunction): void {
testPerm(
{ read: false, write: false, net: false, env: false, run: false },
fn
);
}
test(function permSerialization() {
for (const write of [true, false]) {
for (const net of [true, false]) {
for (const env of [true, false]) {
for (const run of [true, false]) {
for (const read of [true, false]) {
const perms: DenoPermissions = { write, net, env, run, read };
assertEquals(perms, permFromString(permToString(perms)));
}
}
}
}
}
});
// To better catch internal errors, permFromString should throw if it gets an
// invalid permission string.
test(function permFromStringThrows() {
let threw = false;
try {
permFromString("bad");
} catch (e) {
threw = true;
}
assert(threw);
});