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<!DOCTYPE html>
<meta charset=utf-8>
<title>Blob slice</title>
<link rel=help href="https://w3c.github.io/FileAPI/#slice-method-algo">
<link rel=author title="Saurabh Anand" href="mailto:saurabhanandiit@gmail.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../support/Blob.js"></script>
<div id="log"></div>
<script>
test_blob(function() {
var blobTemp = new Blob(["PASS"]);
return blobTemp.slice();
}, {
expected: "PASS",
type: "",
desc: "no-argument Blob slice"
});
test(function() {
var blob1, blob2;
test_blob(function() {
return blob1 = new Blob(["squiggle"]);
}, {
expected: "squiggle",
type: "",
desc: "blob1."
});
test_blob(function() {
return blob2 = new Blob(["steak"], {type: "content/type"});
}, {
expected: "steak",
type: "content/type",
desc: "blob2."
});
var arrayBuffer = new ArrayBuffer(16);
var int8View = new Int8Array(arrayBuffer);
for (var i = 0; i < 16; i++) {
int8View[i] = i + 65;
}
var testData = [
[
["PASSSTRING"],
[{start: -6, contents: "STRING"},
{start: -12, contents: "PASSSTRING"},
{start: 4, contents: "STRING"},
{start: 12, contents: ""},
{start: 0, end: -6, contents: "PASS"},
{start: 0, end: -12, contents: ""},
{start: 0, end: 4, contents: "PASS"},
{start: 0, end: 12, contents: "PASSSTRING"},
{start: 7, end: 4, contents: ""}]
],
// Test 3 strings
[
["foo", "bar", "baz"],
[{start: 0, end: 9, contents: "foobarbaz"},
{start: 0, end: 3, contents: "foo"},
{start: 3, end: 9, contents: "barbaz"},
{start: 6, end: 9, contents: "baz"},
{start: 6, end: 12, contents: "baz"},
{start: 0, end: 9, contents: "foobarbaz"},
{start: 0, end: 11, contents: "foobarbaz"},
{start: 10, end: 15, contents: ""}]
],
// Test string, Blob, string
[
["foo", blob1, "baz"],
[{start: 0, end: 3, contents: "foo"},
{start: 3, end: 11, contents: "squiggle"},
{start: 2, end: 4, contents: "os"},
{start: 10, end: 12, contents: "eb"}]
],
// Test blob, string, blob
[
[blob1, "foo", blob1],
[{start: 0, end: 8, contents: "squiggle"},
{start: 7, end: 9, contents: "ef"},
{start: 10, end: 12, contents: "os"},
{start: 1, end: 4, contents: "qui"},
{start: 12, end: 15, contents: "qui"},
{start: 40, end: 60, contents: ""}]
],
// Test blobs all the way down
[
[blob2, blob1, blob2],
[{start: 0, end: 5, contents: "steak"},
{start: 5, end: 13, contents: "squiggle"},
{start: 13, end: 18, contents: "steak"},
{start: 1, end: 3, contents: "te"},
{start: 6, end: 10, contents: "quig"}]
],
// Test an ArrayBufferView
[
[int8View, blob1, "foo"],
[{start: 0, end: 8, contents: "ABCDEFGH"},
{start: 8, end: 18, contents: "IJKLMNOPsq"},
{start: 17, end: 20, contents: "qui"},
{start: 4, end: 12, contents: "EFGHIJKL"}]
],
// Test a partial ArrayBufferView
[
[new Uint8Array(arrayBuffer, 3, 5), blob1, "foo"],
[{start: 0, end: 8, contents: "DEFGHsqu"},
{start: 8, end: 18, contents: "igglefoo"},
{start: 4, end: 12, contents: "Hsquiggl"}]
],
// Test type coercion of a number
[
[3, int8View, "foo"],
[{start: 0, end: 8, contents: "3ABCDEFG"},
{start: 8, end: 18, contents: "HIJKLMNOPf"},
{start: 17, end: 21, contents: "foo"},
{start: 4, end: 12, contents: "DEFGHIJK"}]
],
[
[(new Uint8Array([0, 255, 0])).buffer,
new Blob(['abcd']),
'efgh',
'ijklmnopqrstuvwxyz'],
[{start: 1, end: 4, contents: "\uFFFD\u0000a"},
{start: 4, end: 8, contents: "bcde"},
{start: 8, end: 12, contents: "fghi"},
{start: 1, end: 12, contents: "\uFFFD\u0000abcdefghi"}]
]
];
testData.forEach(function(data, i) {
var blobs = data[0];
var tests = data[1];
tests.forEach(function(expectations, j) {
test(function() {
var blob = new Blob(blobs);
assert_true(blob instanceof Blob);
assert_false(blob instanceof File);
test_blob(function() {
return expectations.end === undefined
? blob.slice(expectations.start)
: blob.slice(expectations.start, expectations.end);
}, {
expected: expectations.contents,
type: "",
desc: "Slicing test: slice (" + i + "," + j + ")."
});
}, "Slicing test (" + i + "," + j + ").");
});
});
}, "Slices");
var invalidTypes = [
"\xFF",
"te\x09xt/plain",
"te\x00xt/plain",
"te\x1Fxt/plain",
"te\x7Fxt/plain"
];
invalidTypes.forEach(function(type) {
test_blob(function() {
var blob = new Blob(["PASS"]);
return blob.slice(0, 4, type);
}, {
expected: "PASS",
type: "",
desc: "Invalid contentType (" + format_value(type) + ")"
});
});
var validTypes = [
"te(xt/plain",
"te)xt/plain",
"te<xt/plain",
"te>xt/plain",
"te@xt/plain",
"te,xt/plain",
"te;xt/plain",
"te:xt/plain",
"te\\xt/plain",
"te\"xt/plain",
"te/xt/plain",
"te[xt/plain",
"te]xt/plain",
"te?xt/plain",
"te=xt/plain",
"te{xt/plain",
"te}xt/plain",
"te\x20xt/plain",
"TEXT/PLAIN",
"text/plain;charset = UTF-8",
"text/plain;charset=UTF-8"
];
validTypes.forEach(function(type) {
test_blob(function() {
var blob = new Blob(["PASS"]);
return blob.slice(0, 4, type);
}, {
expected: "PASS",
type: type.toLowerCase(),
desc: "Valid contentType (" + format_value(type) + ")"
});
});
</script>
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