Add test suite for ds.py deductive inference engine

[Copilot]

• Understand the ds.py functionality and existing test structure
• Create test_ds.py file with tests similar to test_output.py
• Test scenario 1: Simple modus ponens (a=>b with =>a gives =>b)
• Test scenario 2: Multi-premise rule with idea generation (a,b=>c with =>a gives b=>c and idea =>b)
• Test cancellation behavior
• Test no inference when facts don't match
• Test multiple inference steps
• Test duplicate facts prevention
• Run tests to verify they work correctly (all 10 tests pass)
• Run linter (all checks passed)
• Run code review (2 minor nitpicks about sleep durations - kept consistent with test_output.py)
• Run security checks (0 alerts found)
• Update comment style to use => notation instead of -> and |- notation

Original prompt

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This section details on the original issue you should resolve

<issue_title>给ds.py写一个类似output的tests</issue_title>
<issue_description>大概功能如下

a

b

和

---

a

可以得到新的fact

b

而
a
b

c

和

---

a

在得到

b

c

的时候还会把

---

b

放到idea里。</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes 给ds.py写一个类似output的tests #17

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[hzhangxyz]

注释中的风格需要调整成
a => b
=> a
a, b => c
这样的

[Copilot]

注释中的风格需要调整成
a => b
=> a...

Updated all comment styles to use => notation instead of -> and |-. Changes in commit ae1a5cc.

[Copilot]

Pull request overview

This PR adds a comprehensive test suite for the ds.py deductive inference engine module, following the structure and patterns established by test_output.py. The tests verify the core functionality of the deductive system, including modus ponens inference, multi-premise rules with partial application, idea generation, and proper handling of edge cases.

Key changes:

• Created test_ds.py with 6 test cases covering the deductive inference engine
• Tests verify simple modus ponens, multi-premise rules, idea generation, chained inferences, cancellation handling, and duplicate prevention
• All tests follow async patterns consistent with existing test files

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[Copilot]

'except' clause does nothing but pass and there is no explanatory comment.

[Copilot]

'except' clause does nothing but pass and there is no explanatory comment.

[Copilot]

'except' clause does nothing but pass and there is no explanatory comment.

[Copilot]

'except' clause does nothing but pass and there is no explanatory comment.

[Copilot]

'except' clause does nothing but pass and there is no explanatory comment.