1 files changed, 54 insertions, 0 deletions
diff --git a/test/assert.js b/test/assert.js
new file mode 100644
index 0000000..6063ea5
--- /dev/null
+++ b/test/assert.js
@@ -0,0 +1,54 @@
+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]]);
+    }
+};