refactor(utils): ♻️ move nonZeroSign method from int to num ext…

…ension (#511)

Signed-off-by: Albert Mañosa <26429103+albertms10@users.noreply.github.com>

lib/src/utils/int_extension.dart

@@ -1,3 +1,5 @@
+import 'num_extension.dart';
+
 /// An int extension.
 extension IntExtension on int {
   /// This [int] incremented by [step].
@@ -24,16 +26,4 @@ extension IntExtension on int {
 
     return mod == 0 ? n : mod;
   }
-
-  /// The sign of this integer.
-  ///
-  /// Like [sign] except that it returns 1 for zero (considering it positive).
-  ///
-  /// Example:
-  /// ```dart
-  /// 5.nonZeroSign == 1
-  /// 0.nonZeroSign == 1
-  /// (-2).nonZeroSign == -1
-  /// ```
-  int get nonZeroSign => isNegative ? -1 : 1;
 }

lib/src/utils/num_extension.dart

@@ -10,4 +10,16 @@ extension NumExtension on num {
   /// (-5).toDeltaString() == '-5'
   /// ```
   String toDeltaString() => isNegative ? '$this' : '+$this';
+
+  /// The sign of this integer.
+  ///
+  /// Like [sign] except that it returns 1 for zero (considering it positive).
+  ///
+  /// Example:
+  /// ```dart
+  /// 5.nonZeroSign == 1
+  /// 0.nonZeroSign == 1
+  /// (-2).nonZeroSign == -1
+  /// ```
+  int get nonZeroSign => isNegative ? -1 : 1;
 }

test/utils/int_extension_test.dart

@@ -27,13 +27,5 @@ void main() {
         expect(0.nonZeroMod(5), 5);
       });
     });
-
-    group('.nonZeroSign', () {
-      test('returns the non-zero sign of this int', () {
-        expect(5.nonZeroSign, 1);
-        expect(0.nonZeroSign, 1);
-        expect((-2).nonZeroSign, -1);
-      });
-    });
   });
 }

test/utils/num_extension_test.dart

@@ -11,5 +11,15 @@ void main() {
         expect((-10.02).toDeltaString(), '-10.02');
       });
     });
+
+    group('.nonZeroSign', () {
+      test('returns the non-zero sign of this num', () {
+        expect(5.nonZeroSign, 1);
+        expect(345.2345.nonZeroSign, 1);
+        expect(0.nonZeroSign, 1);
+        expect((-2).nonZeroSign, -1);
+        expect((-2.56).nonZeroSign, -1);
+      });
+    });
   });
 }