MediaTypeApiVersionReaderBuilder Does Not Report Parameter Source

[commonsensesoftware]

Is there an existing issue for this?

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Describe the bug

MediaTypeApiVersionReaderBuilder implements IApiVersionParameterSource which is used to describe where an API version parameter can appear. The current implementation does not report its source correctly if there are no parameter names defined.

Expected Behavior

MediaTypeApiVersionReaderBuilder.AddParameters should indicate that it versions by media type, even when there are no parameters. This would have parity with UrlSegmentApiVersionReader, which also does not have parameters.

Steps To Reproduce

var reader = new MediaTypeApiVersionReaderBuilder().Build();
Assert.True(reader.VersionsByMediaType(), "Reader does not version by media type");

This fails when it should succeed.

Exceptions (if any)

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.NET Version

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Anything else?

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