sousa-gecko/testing/web-platform/tests/fetch/api/response/response-form-data.html

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<html>
  <head>
    <meta charset="utf-8">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>
  <body>
    <script>
const validCases = [
    {
        name: "onePartWithEpilogue",
        boundary: "boundary",
        value: "--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary--%0D%0A",
        expected: [["username", "foo"]]
    },
    {
        name: "onePartWithTransportPadding",
        boundary: "boundary",
        value: "--boundary%20%09%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary--%0D%0A",
        expected: [["username", "foo"]]
    },
    {
        name: "onePartWithoutEpilogue",
        boundary: "boundary",
        value: "--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary--",
        expected: [["username", "foo"]]
    },
    {
        name: "twoPartsWithEpilogue",
        boundary: "boundary",
        value: "--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22account%22%0D%0A%0D%0Agoo%0D%0A--boundary--%0D%0A",
        expected: [["username", "foo"], ["account", "goo"]]
    },
    {
        name: "twoPartsWithoutEpilogue",
        boundary: "boundary",
        value: "--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22account%22%0D%0A%0D%0Agoo%0D%0A--boundary--",
        expected: [["username", "foo"], ["account", "goo"]]
    },
    {
        name: "twoPartsWithTransportPadding",
        boundary: "boundary",
        value: "--boundary%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22username%22%0D%0A%0D%0Afoo%0D%0A--boundary%09%20%0D%0AContent-Disposition%3A%20form-data%3B%20name%3D%22account%22%0D%0A%0D%0Agoo%0D%0A--boundary--",
        expected: [["username", "foo"], ["account", "goo"]]
    }
];

validCases.forEach(testData => {
    promise_test(async t => {
        const response = new Response(decodeURIComponent(testData.value), { "headers": [["Content-Type", "multipart/form-data; boundary=" + testData.boundary]] });
        const formData = await response.formData();
        const actual = Array.from(formData.entries());
        assert_equals(actual.length, testData.expected.length, "Number of form data entries should match");
        for (let i = 0; i < testData.expected.length; i++)
            assert_array_equals(actual[i], testData.expected[i], `Entry ${i} should match`);
    }, "Validate form data - " + testData.name);
});

const invalidCases = [
    {
        name: "empty",
        boundary: "boundary",
        value: "--boundary--boundary--%0D%0A"
    },
    {
        name: "cr1",
        boundary: "boundary",
        value: "--boundary%0A--boundary--%0D%0A"
    },
    {
        name: "cr2",
        boundary: "boundary",
        value: "--boundary%0D--boundary--%0D%0A"
    },
    {
        name: "cr3",
        boundary: "boundary",
        value: "--boundary%0D%0A%0D%0A%0D%0A--boundary--%0D%0A"
    },
    {
        name: "cr_",
        boundary: "boundary",
        value: "--boundary%0A_--boundary--%0D%0A"
    },
    {
        name: "dashes",
        boundary: "boundary",
        value: "--boundary-%20---boundary--%0D%0A"
    },
    {
        name: "boundary",
        boundary: "boundary--",
        value: "--boundary--%0D%0A"
    },
];

invalidCases.forEach(testData => {
    promise_test(async t => {
        const response = new Response(decodeURIComponent(testData.value), { "headers": [["Content-Type", "multipart/form-data; boundary=" + testData.boundary]] });
        await promise_rejects_js(t, TypeError, response.formData());
    }, "Validate buggy form data - " + testData.name);
});

promise_test(async t => {
    const response1 = new Response(new FormData);
    const response1Body = await response1.text();
    assert_true(response1Body.startsWith("--"), "start");
    let boundary = response1Body.substring(2).trim();
    assert_true(boundary.endsWith("--"), "end");
    boundary = boundary.slice(0, -2);
    const response2 = new Response(response1Body, { "headers": [["Content-Type", "multipart/form-data; boundary=" + boundary]] });
    const formData = await response2.formData();
    assert_array_equals(Array.from(formData.entries()), []);
}, "Empty form data");
    </script>
  </body>
</html>