1 files changed, 154 insertions, 0 deletions
diff --git a/addon-sdk/source/test/test-text-streams.js b/addon-sdk/source/test/test-text-streams.js
new file mode 100644
index 000000000..c7691fd54
--- /dev/null
+++ b/addon-sdk/source/test/test-text-streams.js
@@ -0,0 +1,154 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const file = require("sdk/io/file");
+const { pathFor } = require("sdk/system");
+const { Loader } = require("sdk/test/loader");
+
+const STREAM_CLOSED_ERROR = new RegExp("The stream is closed and cannot be used.");
+
+// This should match the constant of the same name in text-streams.js.
+const BUFFER_BYTE_LEN = 0x8000;
+
+exports.testWriteRead = function (assert) {
+  let fname = dataFileFilename();
+
+  // Write a small string less than the stream's buffer size...
+  let str = "exports.testWriteRead data!";
+  let stream = file.open(fname, "w");
+  assert.ok(!stream.closed, "stream.closed after open should be false");
+  stream.write(str);
+  stream.close();
+  assert.ok(stream.closed, "stream.closed after close should be true");
+  assert.throws(() => stream.close(),
+                    STREAM_CLOSED_ERROR,
+                    "stream.close after already closed should raise error");
+  assert.throws(() => stream.write("This shouldn't be written!"),
+                    STREAM_CLOSED_ERROR,
+                    "stream.write after close should raise error");
+
+  // ... and read it.
+  stream = file.open(fname);
+  assert.ok(!stream.closed, "stream.closed after open should be false");
+  assert.equal(stream.read(), str,
+                   "stream.read should return string written");
+  assert.equal(stream.read(), "",
+                   "stream.read at EOS should return empty string");
+  stream.close();
+  assert.ok(stream.closed, "stream.closed after close should be true");
+  assert.throws(() => stream.close(),
+                    STREAM_CLOSED_ERROR,
+                    "stream.close after already closed should raise error");
+  assert.throws(() => stream.read(),
+                    STREAM_CLOSED_ERROR,
+                    "stream.read after close should raise error");
+
+  // Write a big string many times the size of the stream's buffer and read it.
+  // Since it comes after the previous test, this also ensures that the file is
+  // truncated when it's opened for writing.
+  str = "";
+  let bufLen = BUFFER_BYTE_LEN;
+  let fileSize = bufLen * 10;
+  for (let i = 0; i < fileSize; i++)
+    str += i % 10;
+  stream = file.open(fname, "w");
+  stream.write(str);
+  stream.close();
+  stream = file.open(fname);
+  assert.equal(stream.read(), str,
+                   "stream.read should return string written");
+  stream.close();
+
+  // The same, but write and read in chunks.
+  stream = file.open(fname, "w");
+  let i = 0;
+  while (i < str.length) {
+    // Use a chunk length that spans buffers.
+    let chunk = str.substr(i, bufLen + 1);
+    stream.write(chunk);
+    i += bufLen + 1;
+  }
+  stream.close();
+  stream = file.open(fname);
+  let readStr = "";
+  bufLen = BUFFER_BYTE_LEN;
+  let readLen = bufLen + 1;
+  do {
+    var frag = stream.read(readLen);
+    readStr += frag;
+  } while (frag);
+  stream.close();
+  assert.equal(readStr, str,
+                   "stream.write and read in chunks should work as expected");
+
+  // Read the same file, passing in strange numbers of bytes to read.
+  stream = file.open(fname);
+  assert.equal(stream.read(fileSize * 100), str,
+                   "stream.read with big byte length should return string " +
+                   "written");
+  stream.close();
+
+  stream = file.open(fname);
+  assert.equal(stream.read(0), "",
+                   "string.read with zero byte length should return empty " +
+                   "string");
+  stream.close();
+
+  stream = file.open(fname);
+  assert.equal(stream.read(-1), "",
+                   "string.read with negative byte length should return " +
+                   "empty string");
+  stream.close();
+
+  file.remove(fname);
+};
+
+exports.testWriteAsync = function (assert, done) {
+  let fname = dataFileFilename();
+  let str = "exports.testWriteAsync data!";
+  let stream = file.open(fname, "w");
+  assert.ok(!stream.closed, "stream.closed after open should be false");
+
+  // Write.
+  stream.writeAsync(str, function (err) {
+    assert.equal(this, stream, "|this| should be the stream object");
+    assert.equal(err, undefined,
+                     "stream.writeAsync should not cause error");
+    assert.ok(stream.closed, "stream.closed after write should be true");
+    assert.throws(() => stream.close(),
+                      STREAM_CLOSED_ERROR,
+                      "stream.close after already closed should raise error");
+    assert.throws(() => stream.writeAsync("This shouldn't work!"),
+                      STREAM_CLOSED_ERROR,
+                      "stream.writeAsync after close should raise error");
+
+    // Read.
+    stream = file.open(fname, "r");
+    assert.ok(!stream.closed, "stream.closed after open should be false");
+    let readStr = stream.read();
+    assert.equal(readStr, str,
+                     "string.read should yield string written");
+    stream.close();
+    file.remove(fname);
+    done();
+  });
+};
+
+exports.testUnload = function (assert) {
+  let loader = Loader(module);
+  let file = loader.require("sdk/io/file");
+
+  let filename = dataFileFilename("temp");
+  let stream = file.open(filename, "w");
+
+  loader.unload();
+  assert.ok(stream.closed, "stream should be closed after module unload");
+};
+
+// Returns the name of a file that should be used to test writing and reading.
+function dataFileFilename() {
+  return file.join(pathFor("ProfD"), "test-text-streams-data");
+}
+
+require('sdk/test').run(exports);