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Add API to choose non-default preopens (#1317)
I need to find a proper document explaining how this all works. As is it works but is not following a proper spec.
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okio-wasifilesystem/src/wasmTest/kotlin/okio/WasiFileSystemPreopensTest.kt
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|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| /* | ||
| * Copyright (C) 2023 Square, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package okio | ||
|
|
||
| import kotlin.test.BeforeTest | ||
| import kotlin.test.Test | ||
| import kotlin.test.assertEquals | ||
| import kotlin.test.assertFailsWith | ||
| import kotlin.test.assertNull | ||
| import okio.Path.Companion.toPath | ||
| import okio.WasiFileSystem.Companion.DEFAULT_FIRST_PREOPEN | ||
|
|
||
| /** | ||
| * Confirm the [WasiFileSystem] can operate on different preopened directories independently. | ||
| * | ||
| * This tracks the `preopens` attribute in `.mjs` script in `okio-wasifilesystem/build.gradle.kts`. | ||
| */ | ||
| class WasiFileSystemPreopensTest { | ||
| private val fileSystem = WasiFileSystem( | ||
| relativePathPreopen = DEFAULT_FIRST_PREOPEN, | ||
| pathToPreopen = mapOf( | ||
| "/tmp".toPath() to DEFAULT_FIRST_PREOPEN, | ||
| "/a".toPath() to DEFAULT_FIRST_PREOPEN + 1, | ||
| "/b".toPath() to DEFAULT_FIRST_PREOPEN + 2, | ||
| ), | ||
| ) | ||
|
|
||
| private val testId = "${this::class.simpleName}-${randomToken(16)}" | ||
| private val baseA: Path = "/a".toPath() / testId | ||
| private val baseB: Path = "/b".toPath() / testId | ||
|
|
||
| @BeforeTest | ||
| fun setUp() { | ||
| fileSystem.createDirectory(baseA) | ||
| fileSystem.createDirectory(baseB) | ||
| } | ||
|
|
||
| @Test | ||
| fun operateOnPreopens() { | ||
| fileSystem.write(baseA / "a.txt") { | ||
| writeUtf8("hello world a") | ||
| } | ||
| fileSystem.write(baseB / "b.txt") { | ||
| writeUtf8("bello burld") | ||
| } | ||
| assertEquals( | ||
| "hello world a".length.toLong(), | ||
| fileSystem.metadata(baseA / "a.txt").size, | ||
| ) | ||
| assertEquals( | ||
| "bello burld".length.toLong(), | ||
| fileSystem.metadata(baseB / "b.txt").size, | ||
| ) | ||
| } | ||
|
|
||
| @Test | ||
| fun operateAcrossPreopens() { | ||
| fileSystem.write(baseA / "a.txt") { | ||
| writeUtf8("hello world") | ||
| } | ||
|
|
||
| fileSystem.atomicMove(baseA / "a.txt", baseB / "b.txt") | ||
|
|
||
| assertEquals( | ||
| "hello world", | ||
| fileSystem.read(baseB / "b.txt") { | ||
| readUtf8() | ||
| }, | ||
| ) | ||
| } | ||
|
|
||
| @Test | ||
| fun cannotOperateOutsideOfPreopens() { | ||
| val noPreopen = "/c".toPath() / testId | ||
| assertFailsWith<FileNotFoundException> { | ||
| fileSystem.createDirectory(noPreopen) | ||
| } | ||
| assertFailsWith<FileNotFoundException> { | ||
| fileSystem.sink(noPreopen) | ||
| } | ||
| assertNull(fileSystem.metadataOrNull(noPreopen)) | ||
| assertFailsWith<FileNotFoundException> { | ||
| fileSystem.metadata(noPreopen) | ||
| } | ||
| assertNull(fileSystem.listOrNull(noPreopen)) | ||
| assertFailsWith<FileNotFoundException> { | ||
| fileSystem.list(noPreopen) | ||
| } | ||
| } | ||
| } |
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