Add missing tests of BitCascadingValueProvider (#11850)

[msynk]

closes #11850

Summary by CodeRabbit

• Tests
  • Added comprehensive test coverage for cascading value provisioning functionality, including multiple scenarios and edge cases.

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Walkthrough

Adds comprehensive unit tests for the BitCascadingValueProvider component, including a test class with nine test methods and two test utility Blazor components (CascadingConsumer and NullableConsumer) to validate cascading value provisioning across various scenarios.

Changes

Cohort / File(s)	Summary
Test Class src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/BitCascadingValueProviderTests.cs	Adds BitCascadingValueProviderTests with 9 test methods: ShouldProvideCascadingValuesFromEnumerable, ShouldProvideCascadingValuesFromValueList, ShouldRenderChildContentWhenNoValuesAreProvided, ShouldRenderEmptyWhenNothingProvided, ShouldPreferValuesParameterOverValueList, ShouldSkipNullEntriesAndStillCascadeOthers, ShouldRespectOrderWhenDuplicateNamesExist, ShouldAllowNullValuesWhenTypeProvided, and ShouldHandleManyCascadingValues. Tests cover enumerable and list-based value provisioning, null handling, duplicate names, precedence rules, and edge cases.
Test Utility Components src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs, src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs	Adds two test helper Blazor components: CascadingConsumer with cascading parameters Number (int) and Greeting (string?); NullableConsumer with cascading parameters NullableNumber (int?) and Greeting (string?). Both render concatenated output of their cascading parameters.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

• Homogeneous pattern: nine test methods following consistent setup-render-assert structure across similar scenarios
• Test-specific changes with straightforward logic and assertions
• Utility components are trivial implementations with minimal complexity
• Areas requiring attention: Verify test assertions are accurate for each cascading scenario; confirm edge cases (null values, duplicate names, many values) are properly validated

Poem

🐰 Tests cascade like carrots in a row,
Nine scenarios, now we truly know,
The Provider works, both far and near,
With null and dupes, all crystal clear!
thump thump ✨

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding missing tests for BitCascadingValueProvider, directly addressing the linked issue.
Linked Issues check	✅ Passed	The pull request adds comprehensive unit tests for BitCascadingValueProvider covering various scenarios (enumerable values, value lists, null handling, ordering, etc.), fully satisfying the objective to add missing unit tests.
Out of Scope Changes check	✅ Passed	All changes are directly related to adding tests for BitCascadingValueProvider; helper components (CascadingConsumer, NullableConsumer) are appropriately scoped test utilities.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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Actionable comments posted: 0

🧹 Nitpick comments (1)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/BitCascadingValueProviderTests.cs (1)

167-193: Consider adding assertion for consumer.Greeting in the null values test.

The test validates NullableNumber is null but doesn't explicitly assert that Greeting is also null on the consumer. While the markup assertion "-" implies both are null, an explicit assertion would improve test clarity.

         Assert.IsNull(intCascade.Value);
         Assert.AreEqual("Greeting", stringCascade.Name);
         Assert.IsNull(consumer.NullableNumber);
+        Assert.IsNull(consumer.Greeting);
         component.MarkupMatches("-");

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

Knowledge base: Disabled due to Reviews -> Disable Knowledge Base setting

📥 Commits

Reviewing files that changed from the base of the PR and between 2c4972a and 6c121f7.

📒 Files selected for processing (3)

• src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/BitCascadingValueProviderTests.cs (1 hunks)
• src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs (1 hunks)
• src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs (1 hunks)

🧰 Additional context used

🧬 Code graph analysis (3)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs (1)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs (1)

• BuildRenderTree (12-15)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs (1)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs (1)

• BuildRenderTree (12-15)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/BitCascadingValueProviderTests.cs (3)

src/BlazorUI/Bit.BlazorUI/Utils/Params/BitCascadingValueProvider.cs (1)

• BitCascadingValueProvider (9-93)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs (1)

• CascadingConsumer (6-16)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs (1)

• NullableConsumer (6-16)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: build Bit.BlazorUI

🔇 Additional comments (3)

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/NullableConsumer.cs (1)

6-16: LGTM!

The NullableConsumer test helper is well-structured. It correctly uses nullable types (int?, string?) for cascading parameters, enabling tests to validate null value handling in BitCascadingValueProvider. The implementation mirrors the pattern used in CascadingConsumer.

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/CascadingConsumer.cs (1)

6-16: LGTM!

Clean implementation of a test helper component. The use of non-nullable int for Number (defaulting to 0 if not cascaded) and nullable string? for Greeting provides good coverage for different cascading parameter scenarios.

src/BlazorUI/Bit.BlazorUI.Tests/Utils/Params/BitCascadingValueProviderTests.cs (1)

9-36: Good test coverage for cascading value provisioning.

The test class comprehensively covers the BitCascadingValueProvider component with well-structured tests for enumerable values, null entries, empty states, and parameter precedence.