Improve code coverage for System.Text.Json with targeted unit tests#120731

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Copilot wants to merge 24 commits intomainfrom

copilot/maximize-code-coverage-json

Commits on Oct 15, 2025

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Improve code coverage for System.Text.Json with targeted unit tests

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stephentoub
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Mark DeepEquals_TooDeepJsonDocument test as OuterLoop

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stephentoub
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Add tests for SerializeToDocument/Element/Node with JsonTypeInfo and Deserialize from Span

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stephentoub
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Add tests for null value scenarios with JsonTypeInfo

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stephentoub
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Fix tests to use DefaultJsonTypeInfoResolver

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stephentoub
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Add 15 more tests for JsonSerializer Deserialize/Serialize methods with JsonTypeInfo

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stephentoub
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Add 13 tests using JsonSerializerContext for various Serialize/Deserialize methods

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stephentoub
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Commits on Oct 16, 2025

Commits on Oct 17, 2025