#6772: show null execution result tests (#6799)

* #6772 add test notebook

* #6772 add test cases

* #6772 fix null execution test case

test/notebooks/groovy/ShowNullExecutionResultTest.ipynb

@@ -0,0 +1,92 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "true"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "null"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult = true;\n",
+    "String seeNullString = null;\n",
+    "seeNullString"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "null"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "com.twosigma.beakerx.kernel.Kernel.showNullExecutionResult = false;\n",
+    "String noNullString = null;\n",
+    "noNullString"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Groovy",
+   "language": "groovy",
+   "name": "groovy"
+  },
+  "language_info": {
+   "codemirror_mode": "groovy",
+   "file_extension": ".groovy",
+   "mimetype": "",
+   "name": "Groovy",
+   "nbconverter_exporter": "",
+   "version": "2.4.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}

test/tests/groovy/showNullExecutionResultTest.js

@@ -0,0 +1,59 @@
+/*
+ *  Copyright 2017 TWO SIGMA OPEN SOURCE, LLC
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+var BeakerXPageObject = require('../beakerx.po.js');
+var beakerxPO;
+
+describe('(Groovy) Testing of showing the null execution result', function() {
+
+  beforeAll(function () {
+    beakerxPO = new BeakerXPageObject();
+    beakerxPO.runNotebookByUrl('/notebooks/test/notebooks/groovy/ShowNullExecutionResultTest.ipynb');
+  }, 2);
+
+  afterAll(function () {
+    beakerxPO.closeAndHaltNotebook();
+  });
+
+  describe('(Groovy) Show null execution result as true', function() {
+    it('Cell displays true output', function () {
+      cellIndex = 0;
+      var codeCell = beakerxPO.runCodeCellByIndex(cellIndex);
+
+      expect(codeCell.$('div.output_result').isEnabled()).toBeTruthy();
+      expect(codeCell.$('div.output_result').getText()).toBe('true');
+    });
+  });
+
+  describe('(Groovy) Show null execution result as null', function() {
+    it('Cell displays null output', function () {
+      cellIndex += 1;
+      var codeCell = beakerxPO.runCodeCellByIndex(cellIndex);
+
+      expect(codeCell.$('div.output_result').isEnabled()).toBeTruthy();
+      expect(codeCell.$('div.output_result').getText()).toBe('null');
+    });
+  });
+
+  describe('(Groovy) Do not show null execution result', function() {
+    it('Cell displays no output', function () {
+      cellIndex += 1;
+      var codeCell = beakerxPO.runCodeCellByIndex(cellIndex);
+
+      expect(codeCell.$('div.output').getText()).toBe('');
+    });
+  });
+});