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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /toolkit/components/osfile/tests/xpcshell/test_read_write.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'toolkit/components/osfile/tests/xpcshell/test_read_write.js')
-rw-r--r--toolkit/components/osfile/tests/xpcshell/test_read_write.js103
1 files changed, 103 insertions, 0 deletions
diff --git a/toolkit/components/osfile/tests/xpcshell/test_read_write.js b/toolkit/components/osfile/tests/xpcshell/test_read_write.js
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index 000000000..00235ed8c
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+++ b/toolkit/components/osfile/tests/xpcshell/test_read_write.js
@@ -0,0 +1,103 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+var {utils: Cu} = Components;
+
+var SHARED_PATH;
+
+var EXISTING_FILE = do_get_file("xpcshell.ini").path;
+
+add_task(function* init() {
+ do_get_profile();
+ SHARED_PATH = OS.Path.join(OS.Constants.Path.profileDir, "test_osfile_read.tmp");
+});
+
+
+// Check that OS.File.read() is executed after the previous operation
+add_test_pair(function* ordering() {
+ let string1 = "Initial state " + Math.random();
+ let string2 = "After writing " + Math.random();
+ yield OS.File.writeAtomic(SHARED_PATH, string1);
+ OS.File.writeAtomic(SHARED_PATH, string2);
+ let string3 = yield OS.File.read(SHARED_PATH, { encoding: "utf-8" });
+ do_check_eq(string3, string2);
+});
+
+add_test_pair(function* read_write_all() {
+ let DEST_PATH = SHARED_PATH + Math.random();
+ let TMP_PATH = DEST_PATH + ".tmp";
+
+ let test_with_options = function(options, suffix) {
+ return Task.spawn(function*() {
+ do_print("Running test read_write_all with options " + JSON.stringify(options));
+ let TEST = "read_write_all " + suffix;
+
+ let optionsBackup = JSON.parse(JSON.stringify(options));
+
+ // Check that read + writeAtomic performs a correct copy
+ let currentDir = yield OS.File.getCurrentDirectory();
+ let pathSource = OS.Path.join(currentDir, EXISTING_FILE);
+ let contents = yield OS.File.read(pathSource);
+ do_check_true(!!contents); // Content is not empty
+ let bytesRead = contents.byteLength;
+
+ let bytesWritten = yield OS.File.writeAtomic(DEST_PATH, contents, options);
+ do_check_eq(bytesRead, bytesWritten); // Correct number of bytes written
+
+ // Check that options are not altered
+ do_check_eq(JSON.stringify(options), JSON.stringify(optionsBackup));
+ yield reference_compare_files(pathSource, DEST_PATH, TEST);
+
+ // Check that temporary file was removed or never created exist
+ do_check_false(new FileUtils.File(TMP_PATH).exists());
+
+ // Check that writeAtomic fails if noOverwrite is true and the destination
+ // file already exists!
+ contents = new Uint8Array(300);
+ let view = new Uint8Array(contents.buffer, 10, 200);
+ try {
+ let opt = JSON.parse(JSON.stringify(options));
+ opt.noOverwrite = true;
+ yield OS.File.writeAtomic(DEST_PATH, view, opt);
+ do_throw("With noOverwrite, writeAtomic should have refused to overwrite file (" + suffix + ")");
+ } catch (err if err instanceof OS.File.Error && err.becauseExists) {
+ do_print("With noOverwrite, writeAtomic correctly failed (" + suffix + ")");
+ }
+ yield reference_compare_files(pathSource, DEST_PATH, TEST);
+
+ // Check that temporary file was removed or never created
+ do_check_false(new FileUtils.File(TMP_PATH).exists());
+
+ // Now write a subset
+ let START = 10;
+ let LENGTH = 100;
+ contents = new Uint8Array(300);
+ for (var i = 0; i < contents.byteLength; i++)
+ contents[i] = i % 256;
+ view = new Uint8Array(contents.buffer, START, LENGTH);
+ bytesWritten = yield OS.File.writeAtomic(DEST_PATH, view, options);
+ do_check_eq(bytesWritten, LENGTH);
+
+ let array2 = yield OS.File.read(DEST_PATH);
+ do_check_eq(LENGTH, array2.length);
+ for (var i = 0; i < LENGTH; i++)
+ do_check_eq(array2[i], (i + START) % 256);
+
+ // Cleanup.
+ yield OS.File.remove(DEST_PATH);
+ yield OS.File.remove(TMP_PATH);
+ });
+ };
+
+ yield test_with_options({tmpPath: TMP_PATH}, "Renaming, not flushing");
+ yield test_with_options({tmpPath: TMP_PATH, flush: true}, "Renaming, flushing");
+ yield test_with_options({}, "Not renaming, not flushing");
+ yield test_with_options({flush: true}, "Not renaming, flushing");
+});
+
+
+function run_test() {
+ run_next_test();
+}