'use strict';
// Rationale for this particular test character sequence, which is
// used in filenames and also in file contents:
//
// - ABC~ ensures the string starts with something we can read to
// ensure it is from the correct source.
// - ‾¥ are inside JIS and help diagnose problems due to filesystem
// encoding or locale
// - ≈ is inside IBM437 and helps diagnose problems due to filesystem
// encoding or locale
// - ¤ is inside Latin-1 and helps diagnose problems due to
// filesystem encoding or locale
// - ･ is inside JIS and single-byte in some variants and helps
// diagnose problems due to filesystem encoding or locale
// - ・ is inside JIS and double-byte and helps diagnose problems
// due to filesystem encoding or locale
// - • is inside Windows-1252 and helps diagnose problems due to
// filesystem encoding or locale and also ensures these aren't
// accidentally turned into e.g. control codes
// - ∙ is inside IBM437 and helps diagnose problems due to filesystem
// encoding or locale
// - · is inside Latin-1 and helps diagnose problems due to
// filesystem encoding or locale
// - ☼ is inside IBM437 shadowing C0 and helps diagnose problems due to
// filesystem encoding or locale and also ensures these aren't
// accidentally turned into e.g. control codes
// - ★ is inside JIS on a non-Kanji page and makes correct output easier to spot
// - 星 is inside JIS on a Kanji page and makes correct output easier to spot
// - 🌟 is outside the BMP
// - 星 repeated here ensures the correct codec state is used after a non-BMP
// character
// - ★ repeated here also makes correct output easier to spot
// - ☼ is inside IBM437 shadowing C0 and helps diagnose problems due to
// filesystem encoding or locale and also ensures these aren't
// accidentally turned into e.g. control codes
// - · is inside Latin-1 and helps diagnose problems due to
// filesystem encoding or locale
// - ∙ is inside IBM437 and helps diagnose problems due to filesystem
// encoding or locale
// - • is inside Windows-1252 and again helps diagnose problems
// due to filesystem encoding or locale
// - ・ is inside a double-byte range of JIS and helps diagnose
// problems due to filesystem encoding or locale
// - ･ is inside a single-byte range of JIS in some variants and helps
// diagnose problems due to filesystem encoding or locale
// - ¤ is inside Latin-1 and helps diagnose problems due to
// filesystem encoding or locale
// - ≈ is inside IBM437 and helps diagnose problems due to filesystem
// encoding or locale
// - ¥‾ are inside a single-byte range of JIS and help
// diagnose problems due to filesystem encoding or locale
// - ~XYZ ensures earlier errors don't lead to misencoding of
// simple ASCII
//
// Overall the near-symmetry makes common I18N mistakes like
// off-by-1-after-non-BMP easier to spot. All the characters
// are also allowed in Windows Unicode filenames.
const kTestChars = 'ABC~‾¥≈¤･・•∙·☼★星🌟星★☼·∙•・･¤≈¥‾~XYZ';
// fileInputTest - verifies <input type=file> single file selection.
//
// Uses eventSender.beginDragWithFiles and related methods to select
// using drag-n-drop because that is currently the only file selection
// mechanism available to Blink layout tests, likely leading to the
// observed renderer crashes on POSIX-like systems using non-UTF-8
// locales.
//
// Fields in the parameter object:
//
// - fileNameSource: purely explanatory and gives a clue about which
// character encoding is the source for the non-7-bit-ASCII parts of
// the fileBaseName, or Unicode if no smaller-than-Unicode source
// contains all the characters. Used in the test name.
// - fileBaseName: the not-necessarily-just-7-bit-ASCII file basename
// for the test file. Used in the test name.
//
// NOTE: This does not correctly account for varying representation of
// combining characters across platforms and filesystems due to
// Unicode normalization or similar platform-specific normalization
// rules. For that reason none of the tests exercise such characters
// or character sequences.
const fileInputTest = ({
fileNameSource,
fileBaseName,
}) => {
promise_test(async testCase => {
if (document.readyState !== 'complete') {
await new Promise(resolve => addEventListener('load', resolve));
}
assert_own_property(
window,
'eventSender',
'This test relies on eventSender.beginDragWithFiles');
const fileInput = Object.assign(document.createElement('input'), {
type: 'file',
});
// This element must be at the top of the viewport so it can be dragged to.
document.body.prepend(fileInput);
testCase.add_cleanup(() => {
document.body.removeChild(fileInput);
});
eventSender.beginDragWithFiles([`resources/${fileBaseName}`]);
const centerX = fileInput.offsetLeft + fileInput.offsetWidth / 2;
const centerY = fileInput.offsetTop + fileInput.offsetHeight / 2;
eventSender.mouseMoveTo(centerX, centerY);
eventSender.mouseUp();
// eventSender is synchronous so we do not wait for onchange
assert_equals(
fileInput.files[0].name,
fileBaseName,
`Dropped file should be ${fileBaseName}`);
// Removes c:\fakepath\ or other pseudofolder and returns just the
// final component of filePath; allows both / and \ as segment
// delimiters.
const baseNameOfFilePath = filePath => filePath.split(/[\/\\]/).pop();
// For historical reasons .value will be prefixed with
// c:\fakepath\, but the basename should match the dropped file
// name exposed through the newer .files[0].name API. This check
// verifies that assumption.
assert_equals(
fileInput.files[0].name,
baseNameOfFilePath(fileInput.value),
`The basename of the field's value should match its files[0].name`);
// Only by fetching the file can we be sure the file actually
// exists and the host filesystem is actually used. Before this
// point the dragged-in filename from eventSender is not actually
// checked against the host filesystem.
const fileObjectUrl = URL.createObjectURL(fileInput.files[0]);
testCase.add_cleanup(() => {
URL.revokeObjectURL(fileObjectUrl);
});
const fileContents = await (await fetch(fileObjectUrl)).text();
assert_equals(
fileContents,
kTestChars,
`The file should contain ${kTestChars}`);
}, `Select ${fileBaseName} (${fileNameSource}) in a file input`);
};
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