BAEL-6226 Calculate Pi Java Program (#13693)

* BAEL-6226 Calculate Pi Java Program * BAEL-6226 Calculate Pi Java Program
2023-04-04 03:06:12 +01:00
parent d186dc6997
commit 3cdc10d6bb
4 changed files with 63 additions and 0 deletions
--- a/core-java-modules/core-java-numbers-6/src/test/java/com/baeldung/pi/PiProgramUnitTest.java
+++ b/core-java-modules/core-java-numbers-6/src/test/java/com/baeldung/pi/PiProgramUnitTest.java
@@ -0,0 +1,31 @@
+package com.baeldung.pi;
+
+import static org.junit.Assert.*;
+
+import java.util.Random;
+import org.junit.Test;
+
+public class PiProgramUnitTest {
+
+    @Test
+    public void givenPiCalculator_whenCalculatePiWithTenThousandPoints_thenEstimatedPiIsWithinTolerance() {
+        int totalPoints = 10000;
+        int insideCircle = 0;
+
+        Random random = new Random();
+
+        for (long i = 0; i < totalPoints; i++) {
+            double x = random.nextDouble() * 2 - 1;
+            double y = random.nextDouble() * 2 - 1;
+
+            if (x * x + y * y <= 1) {
+                insideCircle++;
+            }
+
+        }
+        double pi = 4.0 * insideCircle / totalPoints;
+
+        assertEquals(Math.PI, pi, 0.01);
+    }
+
+}