From 8dfcd15c263109d7ad7bbb197699dc5a44d202c8 Mon Sep 17 00:00:00 2001
From: tongkahpauu <110804459+tongkahpauu@users.noreply.github.com>
Date: Mon, 8 Aug 2022 13:09:42 +0800
Subject: [PATCH 1/2] Added algorithms for surface area calculation

---
 src/main/scala/Mathematics/SurfaceArea.scala | 90 ++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 src/main/scala/Mathematics/SurfaceArea.scala

diff --git a/src/main/scala/Mathematics/SurfaceArea.scala b/src/main/scala/Mathematics/SurfaceArea.scala
new file mode 100644
index 0000000..3b24fec
--- /dev/null
+++ b/src/main/scala/Mathematics/SurfaceArea.scala
@@ -0,0 +1,90 @@
+package Mathematics
+
+import scala.math.{Pi, pow}
+
+object SurfaceArea {
+
+  /** Calculates the total surface area of a sphere
+    * @param radius
+    *   - a double to retrieve the radius of object
+    * @return
+    *   - a float that returns the area of object or an exception for invalid input
+    */
+  def surfaceAreaCircle(radius: Double): Float = {
+    if (radius < 0) throw new IllegalArgumentException("surfaceAreaCircle() only accepts non-negative values")
+    return  4 * Pi.toFloat * pow(radius, 2).toFloat
+  }
+
+  /** Calculates the total surface area of cuboid
+    * @param length
+    *   - a double to retrieve length of object
+    * @param height
+    *   - a double to retrieve height of object
+    * @param breadth
+    *   - a double to retrieve breadth of object
+    * @return
+    *   - a float that returns the surface area of object or an exception for invalid input
+    */
+  def surfaceAreaCuboid(length: Double, height: Double,breadth:Double): Float = {
+    if (length< 0 || height < 0||breadth <0)
+      throw new IllegalArgumentException("surfaceAreaCuboid() only accepts non-negative values")
+    return (2 *((length*breadth)+(breadth*height)+(length*height))).toFloat
+  }
+
+  /** Calculates the total surface area of cube
+    * @param side
+    *   - a double to retrieve side of object
+    * @return
+    *   - a float that returns the surface area of object or an exception for invalid input
+    */
+  def surfaceAreaCube(side: Double): Float = {
+    if (side<0)
+      throw new IllegalArgumentException("surfaceAreaCube() only accepts non-negative values")
+   return (6 * pow(side, 2)).toFloat
+  }
+
+  
+
+   /** Calculates the total surface area of a right circular cylinder
+    * @param radius
+    *   - a double to retrieve the radius of object
+    * @param height
+    *   - a double to retrieve the height of object
+    * @return
+    *   - a float that returns the surface area of object or an exception for invalid input
+    */
+   def surfaceAreaCylinder(radius: Double, height: Double): Float = {
+    if (radius< 0 || height < 0)
+      throw new IllegalArgumentException("surfaceAreaCyclinder() only accepts non-negative values")
+    return (2*Pi*radius*(radius+height)).toFloat
+  }
+
+  /** Calculates the surface area of a right pyramid
+    * @param side
+    *   - a double to retrieve the side of object
+    * @param height
+    *   - a double to retrieve the height of object
+    * @return
+    *   - a float that returns the surface area of object or an exception for invalid input
+    */
+   def surfaceAreaPyramid(side: Double, height:Double): Float = {
+    if (side < 0 || height < 0) throw new IllegalArgumentException("surfaceAreaPyramid() only accepts non-negative values")
+    return (0.5*((side*4)*height)).toFloat + pow(side, 2).toFloat
+  }
+
+   /** Calculates the surface area of right circular cone
+    * @param length
+    *   - a double to retrieve the length of object
+    * @param radius
+    *   - a double to retrieve the radius of object
+    * @return
+    *   - a float that returns the surface area of object or an exception for invalid input
+    */
+ def surfaceAreaCone(length: Double, radius: Double): Float = {
+     if (length < 0 || radius < 0)
+      throw new IllegalArgumentException("surfaceAreaCone() only accepts non-negative values")
+    return Pi.toFloat*radius.toFloat * (length+radius).toFloat
+  }
+
+  
+}
\ No newline at end of file

From 8132afd19ed2be6aebfc7993ea771a04d8fcef93 Mon Sep 17 00:00:00 2001
From: tongkahpauu <110804459+tongkahpauu@users.noreply.github.com>
Date: Mon, 8 Aug 2022 13:10:21 +0800
Subject: [PATCH 2/2] Added test class for surface area calculation

---
 .../scala/Mathematics/SurfaceAreaSpec.scala   | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 src/test/scala/Mathematics/SurfaceAreaSpec.scala

diff --git a/src/test/scala/Mathematics/SurfaceAreaSpec.scala b/src/test/scala/Mathematics/SurfaceAreaSpec.scala
new file mode 100644
index 0000000..fd85c3f
--- /dev/null
+++ b/src/test/scala/Mathematics/SurfaceAreaSpec.scala
@@ -0,0 +1,77 @@
+package Mathematics
+
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers._
+
+class SurfaceAreaSpec extends AnyFlatSpec {
+
+  "A sphere with radius 4.679" should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaSphere(4.679) === 275.11607f)
+  }
+
+  "A sphere with radius -1" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaSphere(-1)
+    }
+    assert(caught.getMessage == "surfaceAreaSphere() only accepts non-negative values")
+  }
+
+  "A cuboid with length 8.375 , height 7.354 and breadth 7.354 " should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaCuboid(8.375, 7.354,7.354) === 354.52163f)
+  }
+
+  "A cuboid with length -2, height -5, breadth -10" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaCuboid(-2, -5,-10)
+    }
+    assert(caught.getMessage == "surfaceAreaCuboid() only accepts non-negative values")
+  }
+
+  "A cube with side 5" should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaCube(5) === 150.0000f)
+  }
+
+  "A cube with side -2" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaCube(-2)
+    }
+    assert(caught.getMessage == "surfaceAreaCube() only accepts non-negative values")
+  }
+
+
+
+  "A right cylinder with radius 7.857 and height 15.365" should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaCylinder(7.857, 15.365) === 1146.40017f)
+  }
+
+  "A right cylinder with radius -2 and height -5" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaCylinder(-2, -5)
+    }
+    assert(caught.getMessage == "surfaceAreaCylinder() only accepts non-negative values")
+  }
+
+  "A right pyramid with side 5.352 and height 7.872" should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaPyramid(5.352,7.872) === 117.64131f)
+  }
+
+  "A right pyramid with side -3 and height -4" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaPyramid(-3,-4)
+    }
+    assert(caught.getMessage == "surfaceAreaPyramid() only accepts non-negative values")
+  }
+
+  "A right circular cone with length of 10.395 and radius of 5.944" should "output the correct Float result" in {
+    assert(SurfaceArea.surfaceAreaCone(10.395, 5.944) === 334.60221f)
+  }
+
+  "A right circular cone with length of -4 and radius of -5" should "output the correct exception result" in {
+    val caught = intercept[IllegalArgumentException] {
+      SurfaceArea.surfaceAreaCone(-4, -5)
+    }
+    assert(caught.getMessage == "surfaceAreaCone() only accepts non-negative values")
+  }
+
+  
+}
\ No newline at end of file