Do not spawn blacklisted_name lint in test context

[popzxc]

---

fixed #7305

Please write a short comment explaining your change (or "none" for internal only changes)

changelog: blacklisted_name lint is not spawned in the test context anymore.

[rust-highfive]

r? @phansch

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[flip1995]

r? @flip1995 (reassigning since @phansch is taking a break)

[flip1995]

We already have some lints, that shouldn't trigger in test code. This is how we usually handle those situations:

When going into a test context, save this information in the lint struct:

rust-clippy/clippy_lints/src/wildcard_imports.rs

Lines 108 to 111 in 48fa1dc

	fn check_item(&mut self, cx: &LateContext<'_>, item: &Item<'_>) {
	if is_test_module_or_function(item) {
	self.test_modules_deep = self.test_modules_deep.saturating_add(1);
	}

When leaving the test context:

rust-clippy/clippy_lints/src/wildcard_imports.rs

Lines 186 to 190 in 48fa1dc

	fn check_item_post(&mut self, _: &LateContext<'_>, item: &Item<'_>) {
	if is_test_module_or_function(item) {
	self.test_modules_deep = self.test_modules_deep.saturating_sub(1);
	}
	}

[flip1995]

Thanks! LGTM overall. One small thing left. Please squash the commits after fixing that.

[flip1995]

@bors r+

Thanks!

[bors]

📌 Commit 28d3873 has been approved by flip1995

[bors]

⌛ Testing commit 28d3873 with merge 8d427b6...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: flip1995
Pushing 8d427b6 to master...