Migrate code to sound null safety

.github/workflows/dart.yml

@@ -14,15 +14,18 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Install dependencies
-        run: pub get
+        run: dart pub get
+
+      # - name: Install coverage
+      #   run: dart pub global activate coverage
 
       - name: Run tests
-        run: pub run test
+        run: dart run test
 
-      - name: Run coverage
-        run: pub run test_coverage
+      # - name: Run coverage
+      #   run: collect_coverage
 
-      - name: Coveralls
-        uses: coverallsapp/github-action@master
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+      # - name: Coveralls
+      #   uses: coverallsapp/github-action@master
+      #   with:
+      #     github-token: ${{ secrets.GITHUB_TOKEN }}

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.0
+- Support to sound null safety
+- Update deprecated dependencies
+
 ## 0.1.2
 - Update code to match Pedantic recommendations
 - Fix examples

analysis_options.yaml

@@ -1 +1 @@
-include: package:pedantic/analysis_options.yaml
+include: package:lints/recommended.yaml

example/q_calc_util_example.dart

@@ -2,9 +2,9 @@ import 'package:q_calc_util/q_calc_util.dart';
 
 void printResults(DixonResults result, int confidence) {
   print('''
-      Confidence: ${confidence}%
-       Lower end: ${result.lowerEnd.toStringAsFixed(3)}
-       Upper end: ${result.upperEnd.toStringAsFixed(3)}
+      Confidence: $confidence%
+       Lower end: ${result.lowerEnd!.toStringAsFixed(3)}
+       Upper end: ${result.upperEnd!.toStringAsFixed(3)}
                Q: ${result.q}
                N: ${result.n}
           Values: ${result.values.toString()}

lib/src/q_calc_util_base.dart

@@ -80,7 +80,7 @@ final Map<int, double> _qTable99 = {
 
 /// Returns a double value from Dixon constants map representing the Q value for
 /// the given `confidence` and `n` value
-double _getQ(Confidence confidence, int n) {
+double? _getQ(Confidence confidence, int n) {
   switch (confidence) {
     case Confidence.percent95:
       return _qTable95[n];
@@ -93,7 +93,7 @@ double _getQ(Confidence confidence, int n) {
 
 //Checks if value is approved under given confidence and n
 bool _isApproved(double value, Confidence confidence, int n) {
-  return (value < _getQ(confidence, n));
+  return (value < _getQ(confidence, n)!);
 }
 
 //lower end functions
@@ -161,8 +161,8 @@ DixonResults _calculateQTest(List<double> values, DixonResults results) {
 
 /// A representation of a Q Test calculation result
 class DixonResults {
-  double lowerEnd;
-  double upperEnd;
+  double? lowerEnd;
+  double? upperEnd;
   List<double> values;
   List<double> removedValues = [];
   final Confidence _confidence;
@@ -176,7 +176,7 @@ class DixonResults {
   int get n => values.length;
 
   /// The Q constant from Dixon's table for the resulting n and given confidence
-  double get q => _getQ(confidence, n);
+  double? get q => _getQ(confidence, n);
 }
 
 /// A representation of a Q Test error

pubspec.yaml

@@ -2,13 +2,12 @@ name: q_calc_util
 description: >
   Dixon's Q Test calculator package for Dart. It makes it easy to identify an
   outlier in a range between 3 and 30 double numbers
-version: 0.1.2
+version: 1.0.0
 homepage: https://github.com/ChemisTechlabs/q_calc_util
 
 environment:
-  sdk: '>=2.0.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dev_dependencies:
+  lints: ^1.0.1
   test: ^1.9.4
-  test_coverage: ^0.4.0
-  pedantic: ^1.0.0

test/q_calc_util_test.dart

@@ -91,8 +91,8 @@ void main() {
 
         expect(results.q, equals(0.569));
         expect(results.n, equals(7));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.1531'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.0017'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.1531'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.0017'));
         expect(results.removedValues.length, equals(1));
         expect(results.removedValues, equals([1.9]));
       });
@@ -107,8 +107,8 @@ void main() {
 
         expect(results.q, equals(0.489));
         expect(results.n, equals(20));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.0854'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.1972'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.0854'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.1972'));
         expect(results.removedValues.length, equals(0));
         expect(results.removedValues, equals([]));
       });
@@ -123,8 +123,8 @@ void main() {
 
         expect(results.q, equals(0.586));
         expect(results.n, equals(14));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.1190'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.4714'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.1190'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.4714'));
         expect(results.removedValues.length, equals(0));
         expect(results.removedValues, equals([]));
       });
@@ -136,8 +136,8 @@ void main() {
 
         expect(results.q, equals(0.717));
         expect(results.n, equals(8));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.1531'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.6468'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.1531'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.6468'));
         expect(results.removedValues.length, equals(0));
         expect(results.removedValues, equals([]));
       });
@@ -152,8 +152,8 @@ void main() {
 
         expect(results.q, equals(0.567));
         expect(results.n, equals(20));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.0854'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.1972'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.0854'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.1972'));
         expect(results.removedValues.length, equals(0));
         expect(results.removedValues, equals([]));
       });
@@ -168,8 +168,8 @@ void main() {
 
         expect(results.q, equals(0.670));
         expect(results.n, equals(14));
-        expect(results.lowerEnd.toStringAsFixed(4), equals('0.1190'));
-        expect(results.upperEnd.toStringAsFixed(4), equals('0.4714'));
+        expect(results.lowerEnd!.toStringAsFixed(4), equals('0.1190'));
+        expect(results.upperEnd!.toStringAsFixed(4), equals('0.4714'));
         expect(results.removedValues.length, equals(0));
         expect(results.removedValues, equals([]));
       });