Fix toString and update test case.

cocos/core/math/mat3.ts

@@ -833,8 +833,8 @@ export class Mat3 extends ValueType {
         const t = this;
         return `[\n${
             t.m00}, ${t.m01}, ${t.m02},\n${
-            t.m03},\n${t.m04}, ${t.m05},\n${
-            t.m06}, ${t.m07},\n${t.m08}\n`
+            t.m03}, ${t.m04}, ${t.m05},\n${
+            t.m06}, ${t.m07}, ${t.m08}\n`
             + `]`;
     }
 

cocos/core/math/mat4.ts

@@ -1825,11 +1825,12 @@ export class Mat4 extends ValueType {
      * @return 当前矩阵的字符串表示。
      */
     public toString (): string {
+        const t = this;
         return `[\n${
-            this.m00}, ${this.m01}, ${this.m02}, ${this.m03},\n${
-            this.m04}, ${this.m05}, ${this.m06}, ${this.m07},\n${
-            this.m08}, ${this.m09}, ${this.m10}, ${this.m11},\n${
-            this.m12}, ${this.m13}, ${this.m14}, ${this.m15}\n`
+            t.m00}, ${t.m01}, ${t.m02}, ${t.m03},\n${
+            t.m04}, ${t.m05}, ${t.m06}, ${t.m07},\n${
+            t.m08}, ${t.m09}, ${t.m10}, ${t.m11},\n${
+            t.m12}, ${t.m13}, ${t.m14}, ${t.m15}\n`
             + ']';
     }
 

tests/core/math/mat3.test.ts

@@ -138,4 +138,20 @@ describe('Test Mat3', () => {
         log('toEuler: ', v0);
         expect(Vec3.equals(v0, expect0)).toBe(true);
     });
+
+    test('toString', () => {
+        const m = new Mat3(
+12.1234, 0, 44.123433,
+55.12234, 6.1230835, 12384.126,
+7348.12237, 1283.8, 0.000009
+);
+        const expect0 = `[
+12.1234, 0, 44.123433,
+55.12234, 6.1230835, 12384.126,
+7348.12237, 1283.8, 0.000009
+]`;
+        const s = m.toString();
+        log('toString: ', s);
+        expect(s).toBe(expect0);
+    });
 });

tests/core/math/mat4.test.ts

@@ -631,4 +631,20 @@ describe('Test Mat4', () => {
         const r = Mat4.multiplyScalarAndAdd(new Mat4(), b, a, 2);
         expect(Mat4.equals(r, res)).toBe(true);
     });
+
+    test('toString', () => {
+        const m = new Mat4(
+12.1234, 0.002, 44.123433, 55.12234,
+6.1230835, 12384.126, 7348.12237, 283.23848943,
+1283.8, 0.000009, 0.012384294, 0.18492384,
+1284734.123, 0.12841203, 0, 0.00001283
+);
+        const expect0 = `[
+12.1234, 0.002, 44.123433, 55.12234,
+6.1230835, 12384.126, 7348.12237, 283.23848943,
+1283.8, 0.000009, 0.012384294, 0.18492384,
+1284734.123, 0.12841203, 0, 0.00001283
+]`;
+        expect(m.toString()).toBe(expect0);
+    });
 });

tests/core/math/rect.test.ts

@@ -78,7 +78,7 @@ describe('Test Rect', () => {
     });
     test('toString', () => {
         const rect1 = new Rect(0, 0, 100, 100);
-        const res = '(0.00, 0.00, 100.00, 100.00)';
+        const res = '(0, 0, 100, 100)';
 
         expect(rect1.toString()).toBe(res);
     });

tests/core/math/size.test.ts

@@ -34,7 +34,7 @@ describe('Test Size', () => {
 
     test('toString', () => {
         const size = new Size(100, 100);
-        expect(size.toString()).toBe('(100.00, 100.00)');
+        expect(size.toString()).toBe('(100, 100)');
     });
 
 });

tests/core/math/vec2.test.ts

@@ -118,6 +118,11 @@ describe('Test Vec2', () => {
         expect(vec3.y).toBe(2);
         expect(vec3.z).toBe(0);
     });
+
+    test('toString', () => {
+        const v = new Vec2(100, 100);
+        expect(v.toString()).toBe('(100, 100)');
+    });
 });
 
 function polar(angle: number, length: number) {

tests/core/math/vec3.test.ts

@@ -343,4 +343,9 @@ describe('Test Vec3', () => {
         expect(vec2.x).toBe(1);
         expect(vec2.y).toBe(2);
     });
+
+    test('toString', () => {
+        const v = new Vec3(100, 100, 1283.3892389);
+        expect(v.toString()).toBe('(100, 100, 1283.3892389)');
+    });
 });

tests/core/math/vec4.test.ts

@@ -474,4 +474,9 @@ describe('Test Vec4', () => {
         expect(Vec4.equals(v4_0, v4_1)).toBeTruthy();
         expect(Vec4.equals(v4_0, v4_2)).toBeFalsy();
     });
+
+    test('toString', () => {
+        const v = new Vec4(100, 100, 1283.3892389, 0);
+        expect(v.toString()).toBe('(100, 100, 1283.3892389, 0)');
+    });
 });