Prevent empty cells from mirror.

Author: karpev98

lib/src/coloring/basic_coloring.dart

@@ -436,7 +436,7 @@ class BasicColoring {
   bool mirrorVerticalLeftRight() {
     for (final int i in 0.rangeTo(2)) {
       for (final int j in 0.rangeTo(5)) {
-        if(_shape.grid[i][j] != 0) {
+        if(_shape.grid[j][i] != 0) {
           _shape.grid[j][5 - i] = _shape.grid[j][i];
         }
       }
@@ -453,7 +453,7 @@ class BasicColoring {
   bool mirrorVerticalRightLeft() {
     for (final int i in 3.rangeTo(5)) {
       for (final int j in 0.rangeTo(5)) {
-        if(_shape.grid[i][j] != 0) {
+        if(_shape.grid[j][i] != 0) {
           _shape.grid[j][5 - i] = _shape.grid[j][i];
         }
       }

test/interpreter_test.dart

@@ -449,11 +449,12 @@ void other_schemas() {
             [0, 0, 0, 0, 0, 0],
             [0, 0, 0, 0, 0, 0],
           ]));
+      var results =interpreter
+          .validateOnScheme(
+          "GO(up) PAINT({yellow}), GO(right), PAINT({red}), GO(right), PAINT({blue}, 3, up), MIRROR(horizontal), MIRROR(vertical)",
+          1);
       expect(
-          interpreter
-              .validateOnScheme(
-                  "GO(up) PAINT({yellow}), GO(right), PAINT({red}), GO(right), PAINT({blue}, 3, up), MIRROR(horizontal) MIRROR(vertical)",
-                  1)
+          results
               .first
               .completed,
           isTrue);