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77 lines
2.8 KiB
Markdown
77 lines
2.8 KiB
Markdown
# Deno runtime tests
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Files in this directory are unit tests for Deno runtime.
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Testing Deno runtime code requires checking API under different runtime
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permissions (ie. running with different `--allow-*` flags). To accomplish this
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all tests exercised are created using `unitTest()` function.
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```
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import { unitTest } from "./test_util.ts";
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unitTest(function simpleTestFn(): void {
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// test code here
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});
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unitTest({
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ignore: Deno.build.os === "windows",
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perms: { read: true, write: true },
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},
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function complexTestFn(): void {
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// test code here
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}
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);
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```
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`unitTest` is is a wrapper function that enhances `Deno.test()` API in several
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ways:
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- ability to conditionally skip tests using `UnitTestOptions.skip`.
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- ability to register required set of permissions for given test case using
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`UnitTestOptions.perms`.
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- sanitization of resources - ensuring that tests close all opened resources
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preventing interference between tests.
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- sanitization of async ops - ensuring that tests don't leak async ops by
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ensuring that all started async ops are done before test finishes.
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## Running tests
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`unit_test_runner.ts` is the main script used to run unit tests.
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Runner discovers required permissions combinations by loading
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`cli/tests/unit/unit_tests.ts` and going through all registered instances of
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`unitTest`.
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There are three ways to run `unit_test_runner.ts`:
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```
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# Run all tests. Spawns worker processes for each discovered permission
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# combination:
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target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --master
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# By default all output of worker processes is discarded; for debug purposes
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# the --verbose flag preserves output from the worker.
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target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --master --verbose
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# Run subset of tests that don't require any permissions.
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target/debug/deno run --unstable cli/tests/unit/unit_test_runner.ts
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# Run subset tests that require "net" and "read" permissions.
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target/debug/deno run --unstable --allow-net --allow-read cli/tests/unit/unit_test_runner.ts
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# "worker" mode communicates with parent using TCP socket on provided address;
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# after initial setup drops permissions to specified set. It shouldn't be used
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# directly, only be "master" process.
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target/debug/deno run -A cli/tests/unit/unit_test_runner.ts --worker --addr=127.0.0.1:4500 --perms=net,write,run
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# Run specific tests.
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target/debug/deno run --unstable --allow-net cli/tests/unit/unit_test_runner.ts -- netTcpListenClose
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RUST_BACKTRACE=1 cargo run -- run --unstable --allow-read --allow-write cli/tests/unit/unit_test_runner.ts -- netUnixDialListen
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```
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### Http server
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`target/debug/test_server` is required to run when one's running unit tests.
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During CI it's spawned automatically, but if you want to run tests manually make
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sure that server is spawned otherwise there'll be cascade of test failures.
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