yahoo/pngjs-image

// Copyright 2015 Yahoo! Inc.
// Copyrights licensed under the Mit License. See the accompanying LICENSE file for terms.

//xhdn0g08 - incorrect IHDR checksum
//xcsn0g01 - incorrect IDAT checksum
var testGen = require('../testGen');

describe('Corrupted files', function () {

    describe('Signature', function () {

        describe('Signature byte 1 MSBit reset to zero', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xs2n0g01',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });

        describe('Signature byte 2 is a "Q"', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xs1n0g01',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });

        describe('Signature byte 4 lowercase', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xs4n0g01',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });

        describe('7th byte a space instead of control-Z', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xs7n0g01',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });

        describe('added cr bytes', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xcrn0g04',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });

        describe('added lf bytes', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xlfn0g04',
                expectFailure: true,
                expectMessage: 'Invalid signature for a PNG image.'
            });
        });
    });

    describe('Header', function () {

        describe('Color-Type', function () {

            describe('1', function () {
                testGen.addDecodeTests({
                    resourceGroup: 'corrupt',
                    resourceFile: 'xc1n0g08',
                    expectFailure: true,
                    expectMessage: 'Unknown color-type 1.'
                });
            });

            describe('9', function () {
                testGen.addDecodeTests({
                    resourceGroup: 'corrupt',
                    resourceFile: 'xc9n2c08',
                    expectFailure: true,
                    expectMessage: 'Unknown color-type 9.'
                });
            });
        });

        describe('Bit-Depth', function () {

            describe('0', function () {
                testGen.addDecodeTests({
                    resourceGroup: 'corrupt',
                    resourceFile: 'xd0n2c08',
                    expectFailure: true,
                    expectMessage: 'Unknown bit-depth of 0.'
                });
            });

            describe('3', function () {
                testGen.addDecodeTests({
                    resourceGroup: 'corrupt',
                    resourceFile: 'xd3n2c08',
                    expectFailure: true,
                    expectMessage: 'Unknown bit-depth of 3.'
                });
            });

            describe('99', function () {
                testGen.addDecodeTests({
                    resourceGroup: 'corrupt',
                    resourceFile: 'xd9n2c08',
                    expectFailure: true,
                    expectMessage: 'Unknown bit-depth of 99.'
                });
            });
        });
    });

    describe('Data', function () {

        describe('Missing IDAT', function () {
            testGen.addDecodeTests({
                resourceGroup: 'corrupt',
                resourceFile: 'xdtn0g01',
                expectFailure: true,
                expectMessage: 'Could not retrieve chunk type IDAT.'
            });
        });
    });
});