✅ test: add unit tests for multimodalContent

[lobehubbot]

Summary

• Added comprehensive unit tests for multimodalContent utility module
• Total test files added: 1
• Test cases added: 25
• Coverage focus: Serialization/deserialization of multimodal message content parts (text and image)

Changes

• All tests pass successfully
• Business logic coverage improved
• Edge cases and error handling covered
• Tests follow existing patterns

Module Processed

packages/utils/src/multimodalContent.ts

Test Coverage

• Functions tested:
  • serializePartsForStorage() - Serializes message content parts to JSON string
  • deserializeParts() - Deserializes JSON string to message content parts
• Coverage type: Unit tests
• Test approach:
  • Testing serialization with various content types (text, image, mixed)
  • Testing deserialization with valid and invalid inputs
  • Testing edge cases (empty arrays, special characters, unicode, invalid JSON)
  • Testing round-trip serialization to ensure data integrity
  • Testing error handling for malformed inputs

Key Test Scenarios Covered:

Serialization:

• Text content parts
• Image content parts (including long base64 data)
• Mixed content (text and image)
• Content with thoughtSignature metadata
• Empty arrays
• Special characters and unicode

Deserialization:

• Valid JSON arrays of text and image parts
• Invalid inputs (plain text, empty strings, invalid JSON)
• JSON objects/primitives (not arrays)
• Empty arrays
• Arrays without proper type property
• Special characters and unicode preservation

Round-trip Testing:

• Data integrity through multiple serialize/deserialize cycles
• No data loss across transformations

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🤖 Generated with Claude Code

Summary by Sourcery

Tests:

• Add comprehensive unit tests for multimodalContent covering serializePartsForStorage and deserializeParts for text, image, mixed, and edge-case inputs, including invalid and malformed data.

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Project	Deployment	Preview	Comments	Updated (UTC)
lobehub	Ready	Preview	Comment	Dec 9, 2025 5:55am

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds a new Jest unit test suite for the multimodalContent utilities, focusing on serialization/deserialization behavior and edge cases for text and image content parts.

File-Level Changes

Change	Details	Files
Add comprehensive unit tests for multimodal content serialization and deserialization, including edge cases and error handling.	Introduce a new test file defining test cases for serializePartsForStorage and deserializeParts covering text, image, mixed, and empty content arrays Verify handling of special characters, unicode, and long base64 image data during serialization and deserialization Add tests for invalid inputs such as non-JSON strings, invalid JSON, non-array JSON values, and arrays with missing or incorrect type fields Include round-trip tests to ensure data integrity across multiple serialize/deserialize cycles and proper error handling for malformed inputs	packages/utils/src/multimodalContent.test.ts

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[gru-agent]

TestGru Assignment

Summary

Link	CommitId	Status	Reason
Detail	db110f1	🚫 Skipped	No files need to be tested {"packages/utils/src/multimodalContent.test.ts":"File path does not match include patterns."}

History Assignment

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[sourcery-ai]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.61%. Comparing base (a775f65) to head (db110f1).

Additional details and impacted files

@@           Coverage Diff           @@
##             next   #10689   +/-   ##
=======================================
  Coverage   80.61%   80.61%           
=======================================
  Files         977      978    +1     
  Lines       66574    66587   +13     
  Branches     8769     8809   +40     
=======================================
+ Hits        53667    53680   +13     
  Misses      12907    12907           

Flag	Coverage Δ
app	73.06% <ø> (ø)
database	98.32% <ø> (ø)
packages/agent-runtime	98.08% <ø> (ø)
packages/context-engine	91.61% <ø> (ø)
packages/conversation-flow	98.05% <ø> (ø)
packages/electron-server-ipc	93.76% <ø> (ø)
packages/file-loaders	92.21% <ø> (ø)
packages/model-bank	100.00% <ø> (ø)
packages/model-runtime	91.66% <ø> (ø)
packages/prompts	79.17% <ø> (ø)
packages/python-interpreter	96.50% <ø> (ø)
packages/utils	95.36% <ø> (+0.05%)	⬆️
packages/web-crawler	96.81% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Store	73.05% <ø> (ø)
Services	56.44% <ø> (ø)
Server	75.34% <ø> (ø)
Libs	38.57% <ø> (ø)
Utils	83.36% <ø> (ø)

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