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test_util.ts
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test_util.ts
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// 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. permW1N0 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,
assertNotEquals,
assertStrictEq
} from "./deps/https/deno.land/std/testing/asserts.ts";
interface TestPermissions {
read?: boolean;
write?: boolean;
net?: boolean;
env?: boolean;
run?: boolean;
hrtime?: boolean;
}
const processPerms = Deno.permissions();
function permissionsMatch(
processPerms: Deno.Permissions,
requiredPerms: Deno.Permissions
): boolean {
for (const permName in processPerms) {
if (processPerms[permName] !== requiredPerms[permName]) {
return false;
}
}
return true;
}
export const permissionCombinations: Map<string, Deno.Permissions> = new Map();
function permToString(perms: Deno.Permissions): 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;
const h = perms.hrtime ? 1 : 0;
return `permR${r}W${w}N${n}E${e}U${u}H${h}`;
}
function registerPermCombination(perms: Deno.Permissions): void {
const key = permToString(perms);
if (!permissionCombinations.has(key)) {
permissionCombinations.set(key, perms);
}
}
function normalizeTestPermissions(perms: TestPermissions): Deno.Permissions {
return {
read: !!perms.read,
write: !!perms.write,
net: !!perms.net,
run: !!perms.run,
env: !!perms.env,
hrtime: !!perms.hrtime
};
}
export function testPerm(
perms: TestPermissions,
fn: testing.TestFunction
): void {
const normalizedPerms = normalizeTestPermissions(perms);
registerPermCombination(normalizedPerms);
if (!permissionsMatch(processPerms, normalizedPerms)) {
return;
}
testing.test(fn);
}
export function test(fn: testing.TestFunction): void {
testPerm(
{
read: false,
write: false,
net: false,
env: false,
run: false,
hrtime: false
},
fn
);
}
function extractNumber(re: RegExp, str: string): number | undefined {
const match = str.match(re);
if (match) {
return Number.parseInt(match[1]);
}
}
export function parseUnitTestOutput(
rawOutput: Uint8Array,
print: boolean
): { actual?: number; expected?: number; resultOutput?: string } {
const decoder = new TextDecoder();
const output = decoder.decode(rawOutput);
let expected, actual, result;
for (const line of output.split("\n")) {
if (!expected) {
// expect "running 30 tests"
expected = extractNumber(/running (\d+) tests/, line);
} else if (line.indexOf("test result:") !== -1) {
result = line;
}
if (print) {
console.log(line);
}
}
// Check that the number of expected tests equals what was reported at the
// bottom.
if (result) {
// result should be a string like this:
// "test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; ..."
actual = extractNumber(/(\d+) passed/, result);
}
return { actual, expected, resultOutput: result };
}
test(function permissionsMatches(): void {
assert(
permissionsMatch(
{
read: true,
write: false,
net: false,
env: false,
run: false,
hrtime: false
},
normalizeTestPermissions({ read: true })
)
);
assert(
permissionsMatch(
{
read: false,
write: false,
net: false,
env: false,
run: false,
hrtime: false
},
normalizeTestPermissions({})
)
);
assertEquals(
permissionsMatch(
{
read: false,
write: true,
net: true,
env: true,
run: true,
hrtime: true
},
normalizeTestPermissions({ read: true })
),
false
);
assertEquals(
permissionsMatch(
{
read: true,
write: false,
net: true,
env: false,
run: false,
hrtime: false
},
normalizeTestPermissions({ read: true })
),
false
);
assert(
permissionsMatch(
{
read: true,
write: true,
net: true,
env: true,
run: true,
hrtime: true
},
{
read: true,
write: true,
net: true,
env: true,
run: true,
hrtime: true
}
)
);
});
testPerm({ read: true }, async function parsingUnitTestOutput(): Promise<void> {
const cwd = Deno.cwd();
const testDataPath = `${cwd}/tools/testdata/`;
let result;
// This is an example of a successful unit test output.
result = parseUnitTestOutput(
await Deno.readFile(`${testDataPath}/unit_test_output1.txt`),
false
);
assertEquals(result.actual, 96);
assertEquals(result.expected, 96);
// This is an example of a silently dying unit test.
result = parseUnitTestOutput(
await Deno.readFile(`${testDataPath}/unit_test_output2.txt`),
false
);
assertEquals(result.actual, undefined);
assertEquals(result.expected, 96);
// This is an example of compiling before successful unit tests.
result = parseUnitTestOutput(
await Deno.readFile(`${testDataPath}/unit_test_output3.txt`),
false
);
assertEquals(result.actual, 96);
assertEquals(result.expected, 96);
// Check what happens on empty output.
result = parseUnitTestOutput(new TextEncoder().encode("\n\n\n"), false);
assertEquals(result.actual, undefined);
assertEquals(result.expected, undefined);
});