[Math] Working out some tests for matrices

Math/MathTests/MatrixTests.swift

@@ -0,0 +1,108 @@
+//
+//  MathTests.swift
+//  MathTests
+//
+//  Created by Eryn Wells on 10/28/15.
+//  Copyright © 2015 Eryn Wells. All rights reserved.
+//
+
+import XCTest
+@testable import Math
+
+class Matrix4Tests: XCTestCase {
+    func testThatItHasProperDimension() {
+        XCTAssertEqual(Matrix4.dimension, 4)
+    }
+
+    func testThatItHasProperCount() {
+        XCTAssertEqual(Matrix4.count, 16)
+        XCTAssertEqual(Matrix4().data.count, Matrix4.count)
+    }
+}
+
+class Matrix4SubscriptTests: XCTestCase {
+    var m: Matrix4! = nil
+
+    override func setUp() {
+        do {
+            m = try Matrix4(values: [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15])
+        } catch {
+            XCTFail()
+        }
+    }
+
+    func testThatSingleSubscriptWorks() {
+        for i in 0..<Matrix4.count {
+            XCTAssertEqual(m[i], m.data[i])
+        }
+    }
+
+    func testThatRowColumnSubscriptWorks() {
+        var value: Int = 0
+        for i in 0..<Matrix4.dimension {
+            for j in 0..<Matrix4.dimension {
+                XCTAssertEqual(m[i,j], Float(value++))
+            }
+        }
+    }
+
+    func testThatSingleSubscriptAssignmentWorks() {
+        m[6] = 42.0
+        XCTAssertEqual(m[6], 42.0)
+    }
+
+    func testThatRowColumnSubscriptAssignmentWorks() {
+        m[1,2] = 42.0
+        XCTAssertEqual(m[1,2], 42.0)
+    }
+}
+
+class Matrix3Tests: XCTestCase {
+    func testThatItHasProperDimension() {
+        XCTAssertEqual(Matrix3.dimension, 3)
+    }
+
+    func testThatItHasProperCount() {
+        XCTAssertEqual(Matrix3.count, 9)
+        XCTAssertEqual(Matrix3().data.count, Matrix3.count)
+    }
+}
+
+class Matrix3SubscriptTests: XCTestCase {
+    var m: Matrix3! = nil
+
+    override func setUp() {
+        m = Matrix3()
+        for i in 0..<Matrix3.count {
+            m[i] = Float(i)
+        }
+    }
+
+    func testThatSingleSubscriptWorks() {
+        for i in 0..<Matrix3.count {
+            XCTAssertEqual(m[i], m.data[i])
+        }
+    }
+
+    func testThatRowColumnSubscriptWorks() {
+        XCTAssertEqual(m[0,0], m.data[0])
+        XCTAssertEqual(m[0,1], m.data[1])
+        XCTAssertEqual(m[0,2], m.data[2])
+        XCTAssertEqual(m[1,0], m.data[3])
+        XCTAssertEqual(m[1,1], m.data[4])
+        XCTAssertEqual(m[1,2], m.data[5])
+        XCTAssertEqual(m[2,0], m.data[6])
+        XCTAssertEqual(m[2,1], m.data[7])
+        XCTAssertEqual(m[2,2], m.data[8])
+    }
+
+    func testThatSingleSubscriptAssignmentWorks() {
+        m[6] = 42.0
+        XCTAssertEqual(m[6], 42.0)
+    }
+
+    func testThatRowColumnSubscriptAssignmentWorks() {
+        m[1,2] = 42.0
+        XCTAssertEqual(m[1,2], 42.0)
+    }
+}