Added Matrix equals method & matrix.ts unit tests

__tests__/matrix.ts

@@ -0,0 +1,33 @@
+import { Matrix } from "../matrix";
+
+let A = new Matrix(
+	[1, 2, 3],
+	[4, 5, 6]
+);
+
+let B = new Matrix(
+	[1, 4],
+	[2, 5],
+	[3, 6]
+);
+
+let C = new Matrix(
+	[ 14, 32 ],
+	[ 32, 77 ]
+);
+
+test('A = B.transpose', () => {
+	expect(A.eq(B.transpose())).toBe(true);
+});
+
+test('B = A.transpose', () => {
+	expect(B.eq(A.transpose())).toBe(true);
+});
+
+test('A * B = C', () => {
+	expect(A.mul(B).eq(C)).toBe(true);
+});
+
+test('B * A != C', () => {
+	expect(B.mul(A).eq(C)).toBe(false);
+});

matrix.ts

@@ -94,4 +94,14 @@ export class Matrix {
 		return new_matrix;
 	}
 
+	eq(other_matrix: Matrix) {
+		if(this.rows != other_matrix.rows || this.cols != other_matrix.cols) return false;
+		for(let i=0; i<this.rows; i++) {
+			for(let j=0; j<this.cols; j++) {
+				if(this.matrix[i][j] != other_matrix.matrix[i][j]) return false;
+			}
+		}
+		return true;
+	}
+
 }