test wip

Signed-off-by: Zixuan James Li <[email protected]>

test/widgets/compose_box_test.dart

@@ -1,8 +1,10 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:math';
 
 import 'package:checks/checks.dart';
 import 'package:file_picker/file_picker.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_checks/flutter_checks.dart';
 import 'package:http/http.dart' as http;
 import 'package:flutter/material.dart';
@@ -582,6 +584,110 @@ void main() {
 
       // TODO test what happens when capturing/uploading fails
     });
+
+    group('attach from keyboard', () {
+      Future<void> testAttachFromKeyboard(WidgetTester tester, {
+        required List<int> data,
+        required String attachedFileUrl,
+        required String mimeType,
+        required String expectedFilename,
+      }) async {
+        TypingNotifier.debugEnable = false;
+        addTearDown(TypingNotifier.debugReset);
+
+        final channel = eg.stream();
+        await prepareComposeBox(tester,
+          narrow: TopicNarrow(channel.streamId, 'topic'), streams: [channel]);
+
+        await tester.enterText(contentInputFinder, 'some content: ');
+        await tester.pump();
+        checkAppearsLoading(tester, false);
+
+        final uploadUrl = '/user_uploads/1/4e/m2A3MSqFnWRLUf9SaPzQ0Up_/$expectedFilename';
+        connection.prepare(delay: const Duration(seconds: 1), json:
+          UploadFileResult(uri: uploadUrl).toJson());
+
+        // Setup adapted from:
+        //   https://github.com/flutter/flutter/blob/0ffc4ce00ea7bb912e379adf39354644eab2c17e/packages/flutter/test/widgets/editable_text_test.dart#L724-L740
+        // This is later used to invoke [EditableText]'s implementation of
+        // [TextInputClient.performAction] on the content [TextField],
+        // which did not expose an API accessible during testing.
+        final ByteData? messageBytes = const JSONMessageCodec().encodeMessage({
+          'args': [
+            -1,
+            'TextInputAction.commitContent',
+            {
+              "mimeType": mimeType,
+              "data": data,
+              "uri": attachedFileUrl,
+            },
+          ],
+          'method': 'TextInputClient.performAction',
+        });
+        await tester.binding.defaultBinaryMessenger.handlePlatformMessage(
+          'flutter/textinput',
+          messageBytes,
+          (ByteData? _) {},
+        );
+        await tester.pump();
+
+        check(controller!.content.text)
+          .equals('some content: [Uploading $expectedFilename…]()\n\n');
+        // (the request is checked more thoroughly in API tests)
+        check(connection.lastRequest!).isA<http.MultipartRequest>()
+          ..method.equals('POST')
+          ..files.single.which((it) => it
+            ..field.equals('file')
+            ..length.equals(data.length)
+            ..filename.equals(expectedFilename)
+            ..contentType.asString.equals(mimeType)
+            ..has<Future<List<int>>>((f) => f.finalize().toBytes(), 'contents')
+              .completes((it) => it.deepEquals(data))
+          );
+        checkAppearsLoading(tester, true);
+
+        await tester.pump(const Duration(seconds: 1));
+        check(controller!.content.text)
+          .equals('some content: [$expectedFilename]($uploadUrl)\n\n');
+        checkAppearsLoading(tester, false);
+      }
+
+      final fileContent = [1, 0, 1, 0, 0];
+
+      testWidgets('empty uri', (tester) async {
+        await testAttachFromKeyboard(tester,
+          data: fileContent,
+          attachedFileUrl: '',
+          mimeType: 'image/jpeg',
+          expectedFilename: 'file');
+      });
+
+      testWidgets('empty file', (tester) async {
+        await testAttachFromKeyboard(tester,
+          data: [],
+          attachedFileUrl: '',
+          mimeType: 'image/jpeg',
+          expectedFilename: 'file');
+      });
+
+      testWidgets('no name', (tester) async {
+        await testAttachFromKeyboard(tester,
+            data: fileContent,
+          attachedFileUrl: 'content://com.zulip.android.zulipboard.provider',
+          mimeType: 'image/jpeg',
+          expectedFilename: 'file');
+      });
+
+      testWidgets('name', (tester) async {
+        await testAttachFromKeyboard(tester,
+          data: fileContent,
+          attachedFileUrl:
+            'content://com.samsung.android.zulipboard.provider'
+            '/root/com.zulip.android.zulipboard/candidate_temp/test.gif',
+          mimeType: 'image/gif',
+          expectedFilename: 'test.gif');
+      });
+    });
   });
 
   group('error banner', () {