Merge cucumber -> testing

testing/src/test/java/com/baeldung/testing/calculator/CalculatorIntegrationTest.java

@@ -0,0 +1,15 @@
+package com.baeldung.testing.calculator;
+
+import org.junit.runner.RunWith;
+
+import cucumber.api.CucumberOptions;
+import cucumber.api.junit.Cucumber;
+
+@RunWith(Cucumber.class)
+@CucumberOptions(
+    features={"classpath:features/calculator.feature", "classpath:features/calculator-scenario-outline.feature"}
+    , plugin = { "pretty", "json:target/reports/json/calculator.json" }
+    , glue = {"com.baeldung.cucumber.calculator"}
+)
+public class CalculatorIntegrationTest {
+}

testing/src/test/java/com/baeldung/testing/calculator/CalculatorRunSteps.java

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+package com.baeldung.testing.calculator;
+
+import com.baeldung.cucumber.Calculator;
+import cucumber.api.java.Before;
+import cucumber.api.java.en.Given;
+import cucumber.api.java.en.Then;
+import cucumber.api.java.en.When;
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+
+public class CalculatorRunSteps {
+
+    private int total;
+
+    private Calculator calculator;
+
+    @Before
+    private void init() {
+        total = -999;
+
+    }
+
+    @Given("^I have a calculator$")
+    public void initializeCalculator() throws Throwable {
+        calculator = new Calculator();
+    }
+
+    @When("^I add (-?\\d+) and (-?\\d+)$")
+    public void testAdd(int num1, int num2) throws Throwable {
+        total = calculator.add(num1, num2);
+    }
+
+    @Then("^the result should be (-?\\d+)$")
+    public void validateResult(int result) throws Throwable {
+        Assert.assertThat(total, Matchers.equalTo(result));
+    }
+
+}

testing/src/test/resources/features/calculator-scenario-outline.feature

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+Feature: Calculator
+  As a user
+  I want to use a calculator to add numbers
+  So that I don't need to add myself
+
+  Scenario Outline: Add two numbers <num1> & <num2>
+    Given I have a calculator
+    When I add <num1> and <num2>
+    Then the result should be <total>
+
+    Examples: 
+    | num1 | num2 | total |
+    | -2 | 3 | 1 |
+    | 10 | 15 | 25 |
+    | 99 | -99 | 0 |
+    | -1 | -10 | -11 |

testing/src/test/resources/features/calculator.feature

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+Feature: Calculator
+  As a user
+  I want to use a calculator to add numbers
+  So that I don't need to add myself
+
+  Scenario: Add two numbers -2 & 3
+    Given I have a calculator
+    When I add -2 and 3
+    Then the result should be 1
+   
+  Scenario: Add two numbers 10 & 15
+    Given I have a calculator
+    When I add 10 and 15
+    Then the result should be 25
+   
+  Scenario: Add two numbers 99 & -99
+    Given I have a calculator
+    When I add 99 and -99
+    Then the result should be 0
+   
+  Scenario: Add two numbers -1 & -10
+    Given I have a calculator
+    When I add -1 and -10
+    Then the result should be -11