From 62a2e4d7aa28669b784d829a2b036cc95f894402 Mon Sep 17 00:00:00 2001
From: bloeys <bloeys@outlook.com>
Date: Fri, 5 Nov 2021 07:22:57 +0400
Subject: [PATCH] Mat2 tests

---
 gglm/mat2_test.go | 123 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 122 insertions(+), 1 deletion(-)

diff --git a/gglm/mat2_test.go b/gglm/mat2_test.go
index 117c31d..e8b8f18 100755
--- a/gglm/mat2_test.go
+++ b/gglm/mat2_test.go
@@ -6,8 +6,130 @@ import (
 	"github.com/bloeys/gglm/gglm"
 )
 
+func TestMat2GetSet(t *testing.T) {
+
+	m1 := gglm.Mat2{}
+
+	m1.Set(0, 1, -10)
+	m1.Set(1, 0, 55)
+
+	if m1.Get(0, 1) != -10 {
+		t.Errorf("Got: %v; Expected: %v", m1.Get(0, 1), -10)
+	}
+
+	if m1.Get(1, 0) != 55 {
+		t.Errorf("Got: %v; Expected: %v", m1.Get(1, 0), 55)
+	}
+}
+
+func TestMat2Id(t *testing.T) {
+
+	correctAns := gglm.Mat2{
+		Data: [4]float32{
+			1, 0,
+			0, 1,
+		}}
+
+	m1 := gglm.NewMat2Id()
+	if !m1.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", m1.String(), correctAns.String())
+	}
+}
+
+func TestSubMat2(t *testing.T) {
+
+	correctAns := gglm.Mat2{
+		Data: [4]float32{
+			-4, -4,
+			-4, -4,
+		}}
+
+	m1 := &gglm.Mat2{
+		Data: [4]float32{
+			1, 2,
+			3, 4,
+		}}
+	m2 := &gglm.Mat2{Data: [4]float32{
+		5, 6,
+		7, 8,
+	}}
+
+	result := gglm.SubMat2(m1, m2)
+	m1.Sub(m2)
+
+	if !result.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", result.String(), correctAns.String())
+	}
+
+	if !m1.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", m1.String(), correctAns.String())
+	}
+}
+
+func TestAddMat2(t *testing.T) {
+
+	correctAns := gglm.Mat2{
+		Data: [4]float32{
+			6, 8,
+			10, 12,
+		}}
+
+	m1 := &gglm.Mat2{
+		Data: [4]float32{
+			1, 2,
+			3, 4,
+		}}
+	m2 := &gglm.Mat2{Data: [4]float32{
+		5, 6,
+		7, 8,
+	}}
+
+	result := gglm.AddMat2(m1, m2)
+	m1.Add(m2)
+
+	if !result.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", result.String(), correctAns.String())
+	}
+
+	if !m1.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", m1.String(), correctAns.String())
+	}
+}
+
+func TestMulMat2(t *testing.T) {
+
+	correctAns := gglm.Mat2{
+		Data: [4]float32{
+			19, 22,
+			43, 50,
+		}}
+
+	m1 := &gglm.Mat2{
+		Data: [4]float32{
+			1, 2,
+			3, 4,
+		}}
+	m2 := &gglm.Mat2{Data: [4]float32{
+		5, 6,
+		7, 8,
+	}}
+
+	result := gglm.MulMat2(m1, m2)
+	m1.Mul(m2)
+
+	if !result.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", result.String(), correctAns.String())
+	}
+
+	if !m1.Eq(&correctAns) {
+		t.Errorf("Got: %v; Expected: %v", m1.String(), correctAns.String())
+	}
+}
+
 func TestMulMat2Vec2(t *testing.T) {
 
+	correctAns := gglm.Vec2{Data: [2]float32{5, 11}}
+
 	m := &gglm.Mat2{
 		Data: [4]float32{
 			1, 2,
@@ -16,7 +138,6 @@ func TestMulMat2Vec2(t *testing.T) {
 	v := &gglm.Vec2{Data: [2]float32{1, 2}}
 
 	result := gglm.MulMat2Vec2(m, v)
-	correctAns := gglm.Vec2{Data: [2]float32{5, 11}}
 
 	if !result.Eq(&correctAns) {
 		t.Errorf("Got: %v; Expected: %v", result.String(), correctAns.String())