Add tests for TerminalController

test/src/ui/controller_test.dart

@@ -0,0 +1,71 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:xterm/xterm.dart';
+
+void main() {
+  group('TerminalController', () {
+    testWidgets('setSelectionRange works', (tester) async {
+      final terminal = Terminal();
+      final terminalView = TerminalController();
+
+      await tester.pumpWidget(MaterialApp(
+        home: Scaffold(
+          body: TerminalView(
+            terminal,
+            controller: terminalView,
+          ),
+        ),
+      ));
+
+      terminalView.setSelectionRange(CellOffset(0, 0), CellOffset(2, 2));
+
+      await tester.pump();
+
+      expect(terminalView.selection, isNotNull);
+    });
+
+    testWidgets('setSelectionMode changes BufferRange type', (tester) async {
+      final terminal = Terminal();
+      final terminalView = TerminalController();
+
+      await tester.pumpWidget(MaterialApp(
+        home: Scaffold(
+          body: TerminalView(
+            terminal,
+            controller: terminalView,
+          ),
+        ),
+      ));
+
+      terminalView.setSelectionRange(CellOffset(0, 0), CellOffset(2, 2));
+
+      expect(terminalView.selection, isA<BufferRangeLine>());
+
+      terminalView.setSelectionMode(SelectionMode.block);
+
+      expect(terminalView.selection, isA<BufferRangeBlock>());
+    });
+
+    testWidgets('clearSelection works', (tester) async {
+      final terminal = Terminal();
+      final terminalView = TerminalController();
+
+      await tester.pumpWidget(MaterialApp(
+        home: Scaffold(
+          body: TerminalView(
+            terminal,
+            controller: terminalView,
+          ),
+        ),
+      ));
+
+      terminalView.setSelectionRange(CellOffset(0, 0), CellOffset(2, 2));
+
+      expect(terminalView.selection, isNotNull);
+
+      terminalView.clearSelection();
+
+      expect(terminalView.selection, isNull);
+    });
+  });
+}