tree f1fc538ce4179aa676fa17d5c754a3862f490616
parent aa40363eb1ce80bb4bd0535fd66960064fdde0a3
author apaseltiner <apaseltiner@google.com> 1792452113 -0700
committer Copybara-Service <copybara-worker@google.com> 1792452245 -0700

Clean up structured_headers_test.cc.

* Replace `<math.h>` with `<cmath>` and qualify `std::nextafter`.
* Remove a duplicate `"empty param-list"` test case in `ParseParameterisedList`.
* Remove an unused local variable and duplicate `SerializeItem` call in `UnserializableDecimals`.
* Simplify `Unserializable*` assertions to `EXPECT_EQ(..., std::nullopt)`.

Protected by test-only change.

PiperOrigin-RevId: 1002672469