Casper has a new Colorizer object which can add color to CLI output http://twitpic.com/6yy8vb

@@ -66,6 +66,7 @@
         };
         // local properties
         this.checker = null;
+        this.colorizer = new phantom.Casper.Colorizer();
         this.currentUrl = 'about:blank';
         this.currentHTTPStatus = 200;
         this.loadInProgress = false;
@@ -832,6 +833,54 @@
     };
 
     /**
+     * This is a port of lime colorizer.
+     * http://trac.symfony-project.org/browser/tools/lime/trunk/lib/lime.php)
+     *
+     * (c) Fabien Potencier, Symfony project, MIT license
+     */
+    phantom.Casper.Colorizer = function() {
+        var options    = { bold: 1, underscore: 4, blink: 5, reverse: 7, conceal: 8 }
+        ,   foreground = { black: 30, red: 31, green: 32, yellow: 33, blue: 34, magenta: 35, cyan: 36, white: 37 }
+        ,   background = { black: 40, red: 41, green: 42, yellow: 43, blue: 44, magenta: 45, cyan: 46, white: 47 }
+        ,   styles     = {
+            'ERROR':     { bg: 'red', fg: 'white', bold: true },
+            'INFO':      { fg: 'green', bold: true },
+            'TRACE':     { fg: 'green', bold: true },
+            'PARAMETER': { fg: 'cyan' },
+            'COMMENT':   { fg: 'yellow' },
+            'GREEN_BAR': { fg: 'white', bg: 'green', bold: true },
+            'RED_BAR':   { fg: 'white', bg: 'red', bold: true },
+            'INFO_BAR':  { fg: 'cyan', bold: true }
+        };
+
+        this.colorize = function(text, styleName) {
+            if (styleName in styles) {
+                return this.format(text, styles[styleName]);
+            }
+            return text;
+        };
+
+        this.format = function(text, style) {
+            if (typeof style !== "object") {
+                return text;
+            }
+            var codes = [];
+            if (style.fg && foreground[style.fg]) {
+                codes.push(foreground[style.fg]);
+            }
+            if (style.bg && foreground[style.bg]) {
+                codes.push(foreground[style.bg]);
+            }
+            for (var option in options) {
+                if (style[option] === true) {
+                    codes.push(options[option]);
+                }
+            }
+            return "\033[" + codes.join(';') + 'm' + text + "\033[0m";
+        };
+    };
+
+    /**
      * Creates a new WebPage instance for Casper use.
      *
      * @param  Casper  casper  A Casper instance

 var testResults = {
     passed: 0,
     failed: 0
-};
+}, PASS = 'PASS', FAIL = 'FAIL';
 
 phantom.Casper.extend({
     assert: function(condition, message) {
-        var status = '[PASS]';
+        var status = PASS;
         if (condition === true) {
+            style = 'INFO';
             testResults.passed++;
         } else {
-            status = '[FAIL]';
+            status = FAIL;
+            style = 'ERROR';
             testResults.failed++;
         }
-        this.echo([status, message].join(' '));
+        this.echo([this.colorizer.colorize(status, style), this.formatMessage(message)].join(' '));
     },
 
     assertEquals: function(testValue, expected, message) {
         if (expected === testValue) {
-            this.echo('[PASS] ' + message);
+            this.echo(this.colorizer.colorize(PASS, 'INFO') + ' ' + this.formatMessage(message));
             testResults.passed++;
         } else {
-            this.echo('[FAIL] ' + message);
-            this.echo('       got:      ' + testValue);
-            this.echo('       expected: ' + expected);
+            this.echo(this.colorizer.colorize(FAIL, 'ERROR') + ' ' + this.formatMessage(message));
+            this.echo('   got:      ' + testValue);
+            this.echo('   expected: ' + expected);
             testResults.failed++;
         }
     },
@@ -49,11 +51,25 @@ phantom.Casper.extend({
         return this.assertMatch(this.getCurrentUrl(), pattern, message);
     },
 
+    formatMessage: function(message) {
+        var parts = /(\w+\(\))(.*)/.exec(message);
+        if (!parts) {
+            return message;
+        }
+        return this.colorizer.colorize(parts[1], 'PARAMETER') + parts[2];
+    },
+
     renderResults: function() {
-        this.echo("==========================================");
-        var total = testResults.passed + testResults.failed,
-            status = testResults.failed > 0 ? 'FAIL' : 'OK';
-        this.echo(status + ': ' + total + ' tests executed, ' + testResults.passed + ' passed, ' + testResults.failed + ' failed.');
+        var total = testResults.passed + testResults.failed, status, style, result;
+        if (testResults.failed > 0) {
+            status = FAIL;
+            style = 'RED_BAR';
+        } else {
+            status = PASS;
+            style = 'GREEN_BAR';
+        }
+        result = status + ' ' + total + ' tests executed, ' + testResults.passed + ' passed, ' + testResults.failed + ' failed.';
+        this.echo(this.colorizer.colorize(result, style));
         this.exit();
     }
 });
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