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

@@ -0,0 +1,38 @@
+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));
+    }
+
+}