simple test for the controller compares binary output of the controll…

…er to the expected png in the file system

test/integration/org/codehaus/groovy/grails/plugins/qrcode/QrcodeControllerTests.groovy

@@ -0,0 +1,25 @@
+package org.codehaus.groovy.grails.plugins.qrcode
+
+import grails.test.*
+import org.springframework.core.io.ClassPathResource
+import org.apache.commons.io.IOUtils
+
+class QrcodeControllerTests extends GrailsUnitTestCase {
+    QrCodeRendererService qrCodeRendererService
+
+    void testSimpleRender() {
+        def qrcodeController = new QrcodeController()
+        qrcodeController.qrCodeRendererService = qrCodeRendererService
+        qrcodeController.request.parameters = [text:'test',size:'30']
+        qrcodeController.index()
+        byte[] out = qrcodeController.response.contentAsByteArray
+        // a 30 by 30 png image of the word "test" in a QRCode
+        InputStream pngIn =
+            new ClassPathResource("org/codehaus/groovy/grails/plugins/qrcode/qrcode_test.png").getInputStream()
+        byte[] png = IOUtils.toByteArray(pngIn)
+
+        assert png != null
+
+        assert Arrays.equals(png,out)
+    }
+}