var assert = require("assert");
assert = module.exports = Object.create(assert);
assert.isArray = function(actual, message) {
if (!Array.isArray(actual)) {
assert.fail(actual, null, message || "expected {actual} to be an Array", null, assert.isArray);
}
};
assert.arrayEqual = function(actual, expected, message) {
message = message || "expected {expected}, found {actual}";
assert.isArray(actual);
if (actual.length != expected.length) {
assert.fail(actual, expected, message);
}
for (var i in actual) {
if (Array.isArray(actual[i])) {
assert.arrayEqual(actual[i], expected[i], message);
} else if (actual[i] != expected[i]) {
assert.fail(actual, expected, message);
}
}
};
assert.imageDataEqual = function(actual, expected, input, width) {
assert.equal(actual.length, expected.length, "expected same " + expected.length + " pixel components, found " + actual.length);
for (var i = 0; i != actual.length; i += 4) {
var p = i / 4;
var y = Math.floor(p / width);
var x = p - y * width;
var msg = "At (" + x + "," + y + "): "
+ "Input rgba(" + input [i ] + "," + input [i + 1] + "," + input [i + 2] + "," + input [i + 3] + ") "
+ "should become rgba(" + expected[i ] + "," + expected[i + 1] + "," + expected[i + 2] + "," + expected[i + 3] + "); "
+ "found rgba(" + actual [i ] + "," + actual [i + 1] + "," + actual [i + 2] + "," + actual [i + 3] + ")";
assert.equal(actual[i ], expected[i ], msg);
assert.equal(actual[i + 1], expected[i + 1], msg);
assert.equal(actual[i + 2], expected[i + 2], msg);
assert.equal(actual[i + 3], expected[i + 3], msg);
}
};
assert.dyeDataEqual = function(actual, expected) {
var channels = ["R", "G", "Y", "B", "M", "C", "W"];
for (var k in channels) {
var shouldExist = channels[k] in expected;
assert.equal(channels[k] in actual, shouldExist, (shouldExist ? "expected" : "unexpected") + " channel " + channels[k] + " in dye data.");
if (!shouldExist) {
continue;
}
assert.arrayEqual(actual[channels[k]], expected[channels[k]]);
}
};