Add more test cases

lib/mod_list_troubleshooter.dart

@@ -49,27 +49,54 @@ class ModListTroubleshooter {
   }
 
   ModList linearForward({int stepSize = 20}) {
-    _endIndex = _startIndex + stepSize;
+    final totalMods = originalModList.activeMods.length;
+    
+    if (_startIndex >= totalMods || _startIndex == _endIndex) {
+      int newStart = totalMods - stepSize;
+      if (newStart < 0) {
+        newStart = 0;
+      }
+      _startIndex = newStart;
+    }
+
+    _startIndex = _startIndex.clamp(0, totalMods);
+    _endIndex = (_startIndex + stepSize).clamp(0, totalMods);
+
     final subset = originalModList.activeMods.keys.toList().sublist(
       _startIndex,
       _endIndex,
     );
+
     currentModList.disableAll();
     currentModList.enableMods(subset);
     _startIndex = _endIndex;
+    
     return currentModList;
   }
 
   ModList linearBackward({int stepSize = 20}) {
-    _startIndex = _endIndex - stepSize;
-    _endIndex = _startIndex;
+    final totalMods = originalModList.activeMods.length;
+
+    if (_endIndex <= 0 || _startIndex == _endIndex) {
+      int newEnd = stepSize;
+      if (newEnd > totalMods) {
+        newEnd = totalMods;
+      }
+      _endIndex = newEnd;
+    }
+
+    _endIndex = _endIndex.clamp(0, totalMods);
+    _startIndex = (_endIndex - stepSize).clamp(0, _endIndex);
+
     final subset = originalModList.activeMods.keys.toList().sublist(
       _startIndex,
       _endIndex,
     );
+
     currentModList.disableAll();
     currentModList.enableMods(subset);
     _endIndex = _startIndex;
+    
     return currentModList;
   }
 

test/mod_list_troubleshooter_test.dart

@@ -158,6 +158,45 @@ void main() {
         expect(result.activeMods.keys.last, equals('test.mod9'));
       },
     );
+    test('Bisect should handle abuse gracefully', () {
+      final troubleshooter = ModListTroubleshooter(modList);
+
+      var result = troubleshooter.binaryBackward();
+      expect(result.activeMods.length, equals(15));
+
+      result = troubleshooter.binaryForward();
+      expect(result.activeMods.length, equals(8));
+
+      result = troubleshooter.binaryBackward();
+      expect(result.activeMods.length, equals(4));
+
+      result = troubleshooter.binaryForward();
+      expect(result.activeMods.length, equals(2));
+
+      result = troubleshooter.binaryBackward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+
+      result = troubleshooter.binaryForward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+
+      result = troubleshooter.binaryBackward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+
+      result = troubleshooter.binaryForward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+
+      result = troubleshooter.binaryBackward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+
+      result = troubleshooter.binaryForward();
+      expect(result.activeMods.length, equals(1));
+      expect(result.activeMods.keys.first, equals('test.mod9'));
+    });
   });
 
   group('Linear Tests', () {
@@ -193,61 +232,159 @@ void main() {
         var result = troubleshooter.linearForward(stepSize: 10);
         expect(result.activeMods.length, equals(10));
         expect(result.activeMods.keys.first, equals('test.mod0'));
+        expect(result.activeMods.keys.last, equals('test.mod9'));
 
         result = troubleshooter.linearForward(stepSize: 10);
         expect(result.activeMods.length, equals(10));
         expect(result.activeMods.keys.first, equals('test.mod10'));
+        expect(result.activeMods.keys.last, equals('test.mod19'));
 
         result = troubleshooter.linearForward(stepSize: 10);
         expect(result.activeMods.length, equals(10));
         expect(result.activeMods.keys.first, equals('test.mod20'));
+        expect(result.activeMods.keys.last, equals('test.mod29'));
       },
     );
     test(
-      'Bisect search should end up with half the mods every backward iteration until 1',
+      'Linear search should end up with 10 mods every backward iteration',
       () {
         final troubleshooter = ModListTroubleshooter(modList);
 
-        var result = troubleshooter.binaryBackward();
-        // Half of our initial 30
-        expect(result.activeMods.length, equals(15));
+        var result = troubleshooter.linearBackward(stepSize: 10);
+        expect(result.activeMods.length, equals(10));
+        expect(result.activeMods.keys.first, equals('test.mod20'));
+        expect(result.activeMods.keys.last, equals('test.mod29'));
 
-        result = troubleshooter.binaryBackward();
-        // Half of our previous result
-        expect(result.activeMods.length, equals(8));
+        result = troubleshooter.linearBackward(stepSize: 10);
+        expect(result.activeMods.length, equals(10));
+        expect(result.activeMods.keys.first, equals('test.mod10'));
+        expect(result.activeMods.keys.last, equals('test.mod19'));
 
-        result = troubleshooter.binaryBackward();
-        expect(result.activeMods.length, equals(4));
-
-        result = troubleshooter.binaryBackward();
-        expect(result.activeMods.length, equals(2));
-
-        result = troubleshooter.binaryBackward();
-        expect(result.activeMods.length, equals(1));
+        result = troubleshooter.linearBackward(stepSize: 10);
+        expect(result.activeMods.length, equals(10));
+        expect(result.activeMods.keys.first, equals('test.mod0'));
+        expect(result.activeMods.keys.last, equals('test.mod9'));
       },
     );
-    test(
-      'Bisect search should end up with half the mods every iteration until 1',
-      () {
+    test('Linear search should end up with 10 mods every iteration', () {
       final troubleshooter = ModListTroubleshooter(modList);
 
-        var result = troubleshooter.binaryBackward();
-        // Half of our initial 30
-        expect(result.activeMods.length, equals(15));
+      var result = troubleshooter.linearBackward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+      expect(result.activeMods.keys.first, equals('test.mod20'));
+      expect(result.activeMods.keys.last, equals('test.mod29'));
 
-        result = troubleshooter.binaryForward();
-        // Half of our previous result
-        expect(result.activeMods.length, equals(8));
+      result = troubleshooter.linearForward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+      expect(result.activeMods.keys.first, equals('test.mod20'));
+      expect(result.activeMods.keys.last, equals('test.mod29'));
 
-        result = troubleshooter.binaryBackward();
-        expect(result.activeMods.length, equals(4));
+      result = troubleshooter.linearBackward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+      expect(result.activeMods.keys.first, equals('test.mod20'));
+      expect(result.activeMods.keys.last, equals('test.mod29'));
+    });
+    test('Linear search should handle abuse gracefully', () {
+      final troubleshooter = ModListTroubleshooter(modList);
 
-        result = troubleshooter.binaryForward();
-        expect(result.activeMods.length, equals(2));
+      var result = troubleshooter.linearBackward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
 
-        result = troubleshooter.binaryBackward();
-        expect(result.activeMods.length, equals(1));
-      },
-    );
+      result = troubleshooter.linearForward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+
+      result = troubleshooter.linearBackward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+
+      result = troubleshooter.linearForward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+
+      result = troubleshooter.linearForward(stepSize: 10);
+      expect(result.activeMods.length, equals(10));
+    });
+    test('Linear search cannot return more items than there are', () {
+      final troubleshooter = ModListTroubleshooter(modList);
+
+      var result = troubleshooter.linearBackward(stepSize: 10000);
+      expect(result.activeMods.length, equals(30));
+
+      result = troubleshooter.linearForward(stepSize: 10000);
+      expect(result.activeMods.length, equals(30));
+    });
+  });
+  group('Loading dependencies', () {
+    late ModList modList = ModList();
+    setUp(() {
+      modList = ModList();
+
+      for (int i = 0; i < 20; i++) {
+        final modId = 'test.mod$i';
+        var mod = makeDummy().copyWith(name: 'Test Mod $i', id: modId);
+        if (i % 3 == 0) {
+          mod = mod.copyWith(dependencies: ['test.mod${i + 1}']);
+        }
+        modList.mods[modId] = mod;
+      }
+      // Dependencies are:
+      // 0 -> 1
+      // 3 -> 4
+      // 6 -> 7
+      // 9 -> 10
+      // 12 -> 13
+      // 15 -> 16
+      // 18 -> 19
+      modList.enableAll();
+    });
+    // Not that it has any reason to since they're completely detached...
+    test('Loading dependencies should not fuck up troubleshooter', () {
+      final troubleshooter = ModListTroubleshooter(modList);
+      final expectedFirst = [
+        'test.mod1',
+        // 0 depends on 1
+        'test.mod0',
+        'test.mod2',
+        // 3 depends on 4
+        'test.mod4',
+        'test.mod3',
+        'test.mod5',
+        // 6 depends on 7
+        'test.mod7',
+        'test.mod6',
+        'test.mod8',
+        // 9 depends on 10
+        'test.mod10',
+        'test.mod9',
+      ];
+
+      var result = troubleshooter.linearForward(stepSize: 10);
+      var loadOrder = result.loadRequired();
+      expect(loadOrder.length, equals(11));
+      for (int i = 0; i < expectedFirst.length; i++) {
+        expect(loadOrder[i], equals(expectedFirst[i]));
+      }
+
+      final expectedSecond = [
+        'test.mod10',
+        'test.mod11',
+        // 12 depends on 13
+        'test.mod13',
+        'test.mod12',
+        'test.mod14',
+        // 15 depends on 16
+        'test.mod16',
+        'test.mod15',
+        'test.mod17',
+        // 18 depends on 19
+        'test.mod19',
+        'test.mod18',
+      ];
+
+      result = troubleshooter.linearForward(stepSize: 10);
+      loadOrder = result.loadRequired();
+      expect(loadOrder.length, equals(10));
+      for (int i = 0; i < expectedSecond.length; i++) {
+        expect(loadOrder[i], equals(expectedSecond[i]));
+      }
+    });
   });
 }