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diff --git a/dom/system/tests/ioutils/test_ioutils_read_write.html b/dom/system/tests/ioutils/test_ioutils_read_write.html new file mode 100644 index 0000000000..f52115d261 --- /dev/null +++ b/dom/system/tests/ioutils/test_ioutils_read_write.html @@ -0,0 +1,520 @@ +<!-- Any copyright is dedicated to the Public Domain. +- http://creativecommons.org/publicdomain/zero/1.0/ --> +<!DOCTYPE HTML> +<html> + +<head> + <meta charset="utf-8"> + <title>Test the IOUtils file I/O API</title> + <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" href="chrome://mochikit/content/tests/SimpleTest/test.css" /> + <script src="file_ioutils_test_fixtures.js"></script> + <script> + "use strict"; + + const { Assert } = ChromeUtils.import("resource://testing-common/Assert.jsm"); + const { ObjectUtils } = ChromeUtils.import("resource://gre/modules/ObjectUtils.jsm"); + + add_task(async function test_read_failure() { + const doesNotExist = PathUtils.join(PathUtils.tempDir, "does_not_exist.tmp"); + await Assert.rejects( + IOUtils.read(doesNotExist), + /Could not open the file at .*/, + "IOUtils::read rejects when file does not exist" + ); + }); + + add_task(async function test_write_no_overwrite() { + // Make a new file, and try to write to it with overwrites disabled. + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_overwrite.tmp"); + const untouchableContents = new TextEncoder().encode("Can't touch this!\n"); + + let exists = await IOUtils.exists(tmpFileName); + ok(!exists, `File ${tmpFileName} should not exist before writing`); + + await IOUtils.write(tmpFileName, untouchableContents); + + exists = await IOUtils.exists(tmpFileName); + ok(exists, `File ${tmpFileName} should exist after writing`); + + const newContents = new TextEncoder().encode("Nah nah nah!\n"); + await Assert.rejects( + IOUtils.write(tmpFileName, newContents, { + mode: "create", + }), + /Refusing to overwrite the file at */, + "IOUtils::write rejects writing to existing file if overwrites are disabled" + ); + ok( + await fileHasBinaryContents(tmpFileName, untouchableContents), + "IOUtils::write doesn't change target file when overwrite is refused" + ); + + const bytesWritten = await IOUtils.write( + tmpFileName, + newContents, + { mode: "overwrite" } + ); + is( + bytesWritten, + newContents.length, + "IOUtils::write can overwrite files if specified" + ); + + await cleanup(tmpFileName); + }); + + add_task(async function test_write_with_backup() { + info("Test backup file option with non-existing file"); + + let fileContents = new TextEncoder().encode("Original file contents"); + let destFileName = PathUtils.join(PathUtils.tempDir, "test_write_with_backup_option.tmp"); + let backupFileName = destFileName + ".backup"; + let bytesWritten = + await IOUtils.write(destFileName, fileContents, { + backupFile: backupFileName, + }); + ok( + await fileHasTextContents(destFileName, "Original file contents"), + "IOUtils::write creates a new file with the correct contents" + ); + ok( + !await fileExists(backupFileName), + "IOUtils::write does not create a backup if the target file does not exist" + ); + is( + bytesWritten, + fileContents.length, + "IOUtils::write correctly writes to a new file without performing a backup" + ); + + info("Test backup file option with existing destination"); + let newFileContents = new TextEncoder().encode("New file contents"); + ok(await fileExists(destFileName), `Expected ${destFileName} to exist`); + bytesWritten = + await IOUtils.write(destFileName, newFileContents, { + backupFile: backupFileName, + }); + ok( + await fileHasTextContents(backupFileName, "Original file contents"), + "IOUtils::write can backup an existing file before writing" + ); + ok( + await fileHasTextContents(destFileName, "New file contents"), + "IOUtils::write can create the target with the correct contents" + ); + is( + bytesWritten, + newFileContents.length, + "IOUtils::write correctly writes to the target after taking a backup" + ); + + await cleanup(destFileName, backupFileName); + }); + + add_task(async function test_write_with_backup_and_tmp() { + info("Test backup with tmp and backup file options, non-existing destination"); + + let fileContents = new TextEncoder().encode("Original file contents"); + let destFileName = PathUtils.join(PathUtils.tempDir, "test_write_with_backup_and_tmp_options.tmp"); + let backupFileName = destFileName + ".backup"; + let tmpFileName = PathUtils.join(PathUtils.tempDir, "temp_file.tmp"); + let bytesWritten = + await IOUtils.write(destFileName, fileContents, { + backupFile: backupFileName, + tmpPath: tmpFileName, + }); + ok(!await fileExists(tmpFileName), "IOUtils::write cleans up the tmpFile"); + ok( + !await fileExists(backupFileName), + "IOUtils::write does not create a backup if the target file does not exist" + ); + ok( + await fileHasTextContents(destFileName, "Original file contents"), + "IOUtils::write can write to the destination when a temporary file is used" + ); + is( + bytesWritten, + fileContents.length, + "IOUtils::write can copy tmp file to destination without performing a backup" + ); + + info("Test backup with tmp and backup file options, existing destination"); + let newFileContents = new TextEncoder().encode("New file contents"); + ok(await fileExists(destFileName), `Expected ${destFileName} to exist`); + bytesWritten = + await IOUtils.write(destFileName, newFileContents, { + backupFile: backupFileName, + tmpPath: tmpFileName, + }); + + ok(!await fileExists(tmpFileName), "IOUtils::write cleans up the tmpFile"); + ok( + await fileHasTextContents(backupFileName, "Original file contents"), + "IOUtils::write can create a backup if the target file exists" + ); + ok( + await fileHasTextContents(destFileName, "New file contents"), + "IOUtils::write can write to the destination when a temporary file is used" + ); + is( + bytesWritten, + newFileContents.length, + "IOUtils::write IOUtils::write can move tmp file to destination after performing a backup" + ); + + info("Test backup with tmp and backup file options, existing destination and backup"); + newFileContents = new TextEncoder().encode("Updated new file contents"); + ok(await fileExists(destFileName), `Expected ${destFileName} to exist`); + ok(await fileExists(backupFileName), `Expected ${backupFileName} to exist`); + bytesWritten = + await IOUtils.write(destFileName, newFileContents, { + backupFile: backupFileName, + tmpPath: tmpFileName, + }); + + ok(!await fileExists(tmpFileName), "IOUtils::write cleans up the tmpFile"); + ok( + await fileHasTextContents(backupFileName, "New file contents"), + "IOUtils::write can create a backup if the target file exists" + ); + ok( + await fileHasTextContents(destFileName, "Updated new file contents"), + "IOUtils::write can write to the destination when a temporary file is used" + ); + is( + bytesWritten, + newFileContents.length, + "IOUtils::write IOUtils::write can move tmp file to destination after performing a backup" + ); + + await cleanup(destFileName, backupFileName); + }); + + add_task(async function test_partial_read() { + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_partial_read.tmp"); + const bytes = Uint8Array.of(...new Array(50).keys()); + const bytesWritten = await IOUtils.write(tmpFileName, bytes); + is( + bytesWritten, + 50, + "IOUtils::write can write entire byte array to file" + ); + + // Read just the first 10 bytes. + const first10 = bytes.slice(0, 10); + const bytes10 = await IOUtils.read(tmpFileName, { maxBytes: 10 }); + ok( + ObjectUtils.deepEqual(bytes10, first10), + "IOUtils::read can read part of a file, up to specified max bytes" + ); + + // Trying to explicitly read nothing isn't useful, but it should still + // succeed. + const bytes0 = await IOUtils.read(tmpFileName, { maxBytes: 0 }); + is(bytes0.length, 0, "IOUtils::read can read 0 bytes"); + + await cleanup(tmpFileName); + }); + + add_task(async function test_empty_read_and_write() { + // Trying to write an empty file isn't very useful, but it should still + // succeed. + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_empty.tmp"); + const emptyByteArray = new Uint8Array(0); + const bytesWritten = await IOUtils.write( + tmpFileName, + emptyByteArray + ); + is(bytesWritten, 0, "IOUtils::write can create an empty file"); + + // Trying to explicitly read nothing isn't useful, but it should still + // succeed. + const bytes0 = await IOUtils.read(tmpFileName, { maxBytes: 0 }); + is(bytes0.length, 0, "IOUtils::read can read 0 bytes"); + + // Implicitly try to read nothing. + const nothing = await IOUtils.read(tmpFileName); + is(nothing.length, 0, "IOUtils:: read can read empty files"); + + await cleanup(tmpFileName); + }); + + add_task(async function test_full_read_and_write() { + // Write a file. + + info("Test writing to a new binary file"); + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_numbers.tmp"); + const bytes = Uint8Array.of(...new Array(50).keys()); + const bytesWritten = await IOUtils.write(tmpFileName, bytes); + is( + bytesWritten, + 50, + "IOUtils::write can write entire byte array to file" + ); + + // Read it back. + info("Test reading a binary file"); + let fileContents = await IOUtils.read(tmpFileName); + ok( + ObjectUtils.deepEqual(bytes, fileContents) && + bytes.length == fileContents.length, + "IOUtils::read can read back entire file" + ); + + const tooManyBytes = bytes.length + 1; + fileContents = await IOUtils.read(tmpFileName, { maxBytes: tooManyBytes }); + ok( + ObjectUtils.deepEqual(bytes, fileContents) && + fileContents.length == bytes.length, + "IOUtils::read can read entire file when requested maxBytes is too large" + ); + + // Clean up. + await cleanup(tmpFileName); + }); + + add_task(async function test_write_relative_path() { + const tmpFileName = "test_ioutils_write_relative_path.tmp"; + const bytes = Uint8Array.of(...new Array(50).keys()); + + info("Test writing a file at a relative destination"); + await Assert.rejects( + IOUtils.write(tmpFileName, bytes), + /Could not parse path/, + "IOUtils::write only works with absolute paths" + ); + }); + + add_task(async function test_read_relative_path() { + const tmpFileName = "test_ioutils_read_relative_path.tmp"; + + info("Test reading a file at a relative destination"); + await Assert.rejects( + IOUtils.read(tmpFileName), + /Could not parse path/, + "IOUtils::write only works with absolute paths" + ); + }); + + add_task(async function test_lz4() { + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_lz4.tmp"); + + info("Test writing lz4 encoded data"); + const varyingBytes = Uint8Array.of(...new Array(50).keys()); + let bytesWritten = await IOUtils.write(tmpFileName, varyingBytes, { compress: true }); + is(bytesWritten, 64, "Expected to write 64 bytes"); + + info("Test reading lz4 encoded data"); + let readData = await IOUtils.read(tmpFileName, { decompress: true }); + ok(readData.equals(varyingBytes), "IOUtils can write and read back LZ4 encoded data"); + + info("Test writing lz4 compressed data"); + const repeatedBytes = Uint8Array.of(...new Array(50).fill(1)); + bytesWritten = await IOUtils.write(tmpFileName, repeatedBytes, { compress: true }); + is(bytesWritten, 23, "Expected 50 bytes to compress to 23 bytes"); + + info("Test reading lz4 encoded data"); + readData = await IOUtils.read(tmpFileName, { decompress: true }); + ok(readData.equals(repeatedBytes), "IOUtils can write and read back LZ4 compressed data"); + + info("Test writing empty lz4 compressed data") + const empty = new Uint8Array(); + bytesWritten = await IOUtils.write(tmpFileName, empty, { compress: true }); + is(bytesWritten, 12, "Expected to write just the LZ4 header, with a content length of 0"); + + + info("Test reading empty lz4 compressed data") + const readEmpty = await IOUtils.read(tmpFileName, { decompress: true }); + ok(readEmpty.equals(empty), "IOUtils can write and read back empty buffers with LZ4"); + const readEmptyRaw = await IOUtils.read(tmpFileName, { decompress: false }); + is(readEmptyRaw.length, 12, "Expected to read back just the LZ4 header"); + const expectedHeader = Uint8Array.of(109, 111, 122, 76, 122, 52, 48, 0, 0, 0, 0, 0); // "mozLz40\0\0\0\0" + ok(readEmptyRaw.equals(expectedHeader), "Expected to read header with content length of 0"); + + await cleanup(tmpFileName); + }); + + add_task(async function test_lz4_bad_call() { + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_lz4_bad_call.tmp"); + + info("Test decompression with invalid options"); + const varyingBytes = Uint8Array.of(...new Array(50).keys()); + let bytesWritten = await IOUtils.write(tmpFileName, varyingBytes, { compress: true }); + is(bytesWritten, 64, "Expected to write 64 bytes"); + await Assert.rejects( + IOUtils.read(tmpFileName, { maxBytes: 4, decompress: true }), + /The `maxBytes` and `decompress` options are not compatible/, + "IOUtils::read rejects when maxBytes and decompress options are both used" + ); + + await cleanup(tmpFileName) + }); + + add_task(async function test_lz4_failure() { + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_lz4_fail.tmp"); + + info("Test decompression of non-lz4 data"); + const repeatedBytes = Uint8Array.of(...new Array(50).fill(1)); + await IOUtils.write(tmpFileName, repeatedBytes, { compress: false }); + + await Assert.rejects( + IOUtils.read(tmpFileName, { decompress: true }), + (actual) => { + is(actual.constructor, DOMException, + "rejection reason constructor for decompress with bad header"); + is(actual.name, "NotReadableError", + "rejection error name for decompress with bad header"); + ok(/Could not decompress file because it has an invalid LZ4 header \(wrong magic number: .*\)/ + .test(actual.message), + "rejection error message for decompress with bad header. Got " + + actual.message); + return true; + }, + "IOUtils::read fails to decompress LZ4 data with a bad header" + ); + + info("Test decompression of short byte buffer"); + const elevenBytes = Uint8Array.of(...new Array(11).fill(1)); + await IOUtils.write(tmpFileName, elevenBytes, { compress: false }); + + await Assert.rejects( + IOUtils.read(tmpFileName, { decompress: true }), + /Could not decompress file because the buffer is too short/, + "IOUtils::read fails to decompress LZ4 data with missing header" + ); + + info("Test decompression of valid header, but corrupt contents"); + const headerFor10bytes = [109, 111, 122, 76, 122, 52, 48, 0, 10, 0, 0, 0] // "mozlz40\0" + 4 byte length + const badContents = new Array(11).fill(255); // Bad leading byte, followed by uncompressed stream. + const goodHeaderBadContents = Uint8Array.of(...headerFor10bytes, ...badContents); + await IOUtils.write(tmpFileName, goodHeaderBadContents, { compress: false }); + + await Assert.rejects( + IOUtils.read(tmpFileName, { decompress: true }), + /Could not decompress file contents, the file may be corrupt/, + "IOUtils::read fails to read corrupt LZ4 contents with a correct header" + ); + + await cleanup(tmpFileName); + }); + + add_task(async function test_write_directory() { + const fileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_write_directory.tmp"); + const tmpPath = `${fileName}.tmp`; + const bytes = Uint8Array.of(1, 2, 3, 4); + + await IOUtils.makeDirectory(fileName); + await Assert.rejects( + IOUtils.write(fileName, bytes), + /NotAllowedError: Could not open the file at .+ for writing/); + + await Assert.rejects( + IOUtils.write(fileName, bytes, { tmpPath }), + /NotAllowedError: Could not open the file at .+ for writing/); + + ok(!await IOUtils.exists(PathUtils.join(fileName, PathUtils.filename(tmpPath)))); + }); + + add_task(async function test_read_offset() { + const tmpFileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_read_offset.tmp"); + + const bytes = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; + const byteArray = Uint8Array.of(...bytes); + + await IOUtils.write(tmpFileName, byteArray); + + for (const offset of [0, 5]) { + info(`Reading bytes from offset ${offset}`); + + const readBytes = await IOUtils.read(tmpFileName, { offset }); + Assert.deepEqual( + Array.from(readBytes), + bytes.slice(offset), + `should have read bytes from offset ${offset}` + ); + } + + for (const offset of [0, 5]) { + info(`Reading up to 5 bytes from offset ${offset}`); + + const readBytes = await IOUtils.read(tmpFileName, {offset, maxBytes: 5}); + Assert.deepEqual( + Array.from(readBytes), + bytes.slice(offset, offset + 5), + `should have read 5 bytes from offset ${offset}` + ); + } + + { + info(`Reading bytes from offset 10`); + const readBytes = await IOUtils.read(tmpFileName, {offset: 10}); + is(readBytes.length, 0, "should have read 0 bytes"); + } + + { + info(`Reading up to 10 bytes from offset 5`); + const readBytes = await IOUtils.read(tmpFileName, {offset: 5, maxBytes: 10}); + is(readBytes.length, 5, "should have read 5 bytes"); + Assert.deepEqual( + Array.from(readBytes), + bytes.slice(5, 10), + "should have read last 5 bytes" + ); + } + }); + + add_task(async function test_write_appendOrCreate() { + const fileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_write_appendOrCreate.tmp"); + + await IOUtils.write(fileName, Uint8Array.of(0, 1, 2, 3, 4), { mode: "appendOrCreate" }); + + { + const contents = await IOUtils.read(fileName); + Assert.deepEqual(Array.from(contents), [0, 1, 2, 3, 4], "read bytes should be equal"); + } + + await IOUtils.write(fileName, Uint8Array.of(5, 6, 7, 8, 9), { mode: "appendOrCreate" }); + + { + const contents = await IOUtils.read(fileName); + Assert.deepEqual(Array.from(contents), [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], "read bytes should be equal after appendOrCreateing"); + } + + await cleanup(fileName); + }); + + add_task(async function test_write_append() { + const fileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_write_append.tmp"); + + await IOUtils.write(fileName, Uint8Array.of(0, 1, 2, 3, 4)); + + const beforeAppend = await IOUtils.read(fileName); + Assert.deepEqual(Array.from(beforeAppend), [0, 1, 2, 3, 4], "read bytes should be equal"); + + await IOUtils.write(fileName, Uint8Array.of(5, 6, 7, 8, 9), { mode: "append" }); + + const afterAppend = await IOUtils.read(fileName); + Assert.deepEqual(Array.from(afterAppend), [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], "read bytes should be equal after appending"); + + await cleanup(fileName); + }); + + add_task(async function test_write_append_no_create() { + const fileName = PathUtils.join(PathUtils.tempDir, "test_ioutils_write_append_no_create.tmp"); + + await Assert.rejects( + IOUtils.write(fileName, Uint8Array.of(5, 6, 7, 8, 9), { mode: "append" }), + /NotFoundError: Could not open the file at .*/ + ); + }); + </script> +</head> + +<body> + <p id="display"></p> + <div id="content" style="display: none"></div> + <pre id="test"></pre> +</body> + +</html> |