test: history widgets

test/widgets/button_form_data_file_test.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:apidash/consts.dart';
+import 'package:apidash/widgets/button_form_data_file.dart';
+
+void main() {
+  testWidgets('Testing FormDataFileButton for default label',
+      (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: FormDataFileButton(),
+        ),
+      ),
+    );
+
+    final icon = find.byIcon(Icons.snippet_folder_rounded);
+    Finder button = find.ancestor(
+        of: icon,
+        matching: find.byWidgetPredicate((widget) => widget is ElevatedButton));
+
+    expect(button, findsOneWidget);
+    expect(find.text(kLabelSelectFile), findsOneWidget);
+  });
+
+  testWidgets('Testing FormDataFileButton with provided label',
+      (WidgetTester tester) async {
+    const testValue = 'test_file.txt';
+    await tester.pumpWidget(
+      const MaterialApp(
+        home: Scaffold(
+          body: FormDataFileButton(initialValue: testValue),
+        ),
+      ),
+    );
+
+    final icon = find.byIcon(Icons.snippet_folder_rounded);
+    Finder button = find.ancestor(
+        of: icon,
+        matching: find.byWidgetPredicate((widget) => widget is ElevatedButton));
+
+    expect(button, findsOneWidget);
+    expect(find.text(testValue), findsOneWidget);
+  });
+
+  testWidgets('Testing FormDataFileButton triggers onPressed callback',
+      (WidgetTester tester) async {
+    bool pressed = false;
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: FormDataFileButton(
+            onPressed: () {
+              pressed = true;
+            },
+          ),
+        ),
+      ),
+    );
+
+    final icon = find.byIcon(Icons.snippet_folder_rounded);
+    Finder button = find.ancestor(
+        of: icon,
+        matching: find.byWidgetPredicate((widget) => widget is ElevatedButton));
+
+    await tester.tap(button);
+    await tester.pump();
+
+    expect(pressed, isTrue);
+  });
+}