fix for GRAILS-9718 "NullPointerException in Grails unit tests because of null Params and Session"

Author: graemerocher

grails-plugin-testing/src/main/groovy/grails/test/mixin/web/GroovyPageUnitTestMixin.groovy

@@ -23,6 +23,7 @@ import org.codehaus.groovy.grails.commons.GrailsTagLibClass
 import org.codehaus.groovy.grails.commons.TagLibArtefactHandler
 import org.codehaus.groovy.grails.commons.metaclass.MetaClassEnhancer
 import org.codehaus.groovy.grails.plugins.web.api.TagLibraryApi
+import org.codehaus.groovy.grails.web.pages.GroovyPageRequestBinding
 import org.codehaus.groovy.grails.web.pages.GroovyPagesTemplateEngine
 import org.codehaus.groovy.grails.web.pages.TagLibraryLookup
 import org.codehaus.groovy.grails.web.plugins.support.WebMetaUtils;
@@ -60,7 +61,7 @@ class GroovyPageUnitTestMixin extends ControllerUnitTestMixin {
     @Before
     void bindGrailsWebRequest() {
         super.bindGrailsWebRequest()
-        pageScope = new GroovyPageBinding()
+        pageScope = new GroovyPageBinding(new GroovyPageRequestBinding(webRequest))
         request.setAttribute(GrailsApplicationAttributes.PAGE_SCOPE, pageScope)
 
     }

grails-test-suite-uber/src/test/groovy/grails/test/mixin/ControllerAndGroovyPageMixinTests.groovy

@@ -10,9 +10,16 @@ import org.junit.Test
 @TestFor(MyController)
 class ControllerAndGroovyPageMixinTests {
 
-    // verifies the above 2 mixins can operator together without error
+    // GRAILS-9718
     @Test
     void testController() {
         controller != null
+
+        views['/foo/_bar.gsp'] = 'Id: ${params.id}'
+
+        params.id = 10
+        def content = render(template:"/foo/bar")
+
+        assert content == 'Id: 10'
     }
 }