Add UI tests for doc(test(...)) attribute checks

src/test/rustdoc-ui/doc-test-attr.rs

@@ -0,0 +1,16 @@
+#![crate_type = "lib"]
+#![deny(invalid_doc_attributes)]
+
+#![doc(test)]
+//~^ ERROR `#[doc(test(...)]` takes a list of attributes
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test = "hello")]
+//~^ ERROR `#[doc(test(...)]` takes a list of attributes
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test(a))]
+//~^ ERROR unknown `doc(test)` attribute `a`
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test(no_crate_inject))]
+#![doc(test(attr(deny(warnings))))]
+
+pub fn foo() {}

src/test/rustdoc-ui/doc-test-attr.stderr

@@ -0,0 +1,34 @@
+error: `#[doc(test(...)]` takes a list of attributes
+  --> $DIR/doc-test-attr.rs:4:8
+   |
+LL | #![doc(test)]
+   |        ^^^^
+   |
+note: the lint level is defined here
+  --> $DIR/doc-test-attr.rs:2:9
+   |
+LL | #![deny(invalid_doc_attributes)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: `#[doc(test(...)]` takes a list of attributes
+  --> $DIR/doc-test-attr.rs:7:8
+   |
+LL | #![doc(test = "hello")]
+   |        ^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: unknown `doc(test)` attribute `a`
+  --> $DIR/doc-test-attr.rs:10:13
+   |
+LL | #![doc(test(a))]
+   |             ^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: aborting due to 3 previous errors
+

src/test/ui/rustdoc/doc-test-attr.rs

@@ -0,0 +1,16 @@
+#![crate_type = "lib"]
+#![deny(invalid_doc_attributes)]
+
+#![doc(test)]
+//~^ ERROR `#[doc(test(...)]` takes a list of attributes
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test = "hello")]
+//~^ ERROR `#[doc(test(...)]` takes a list of attributes
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test(a))]
+//~^ ERROR unknown `doc(test)` attribute `a`
+//~^^ WARN this was previously accepted by the compiler
+#![doc(test(no_crate_inject))]
+#![doc(test(attr(deny(warnings))))]
+
+pub fn foo() {}

src/test/ui/rustdoc/doc-test-attr.stderr

@@ -0,0 +1,34 @@
+error: `#[doc(test(...)]` takes a list of attributes
+  --> $DIR/doc-test-attr.rs:4:8
+   |
+LL | #![doc(test)]
+   |        ^^^^
+   |
+note: the lint level is defined here
+  --> $DIR/doc-test-attr.rs:2:9
+   |
+LL | #![deny(invalid_doc_attributes)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: `#[doc(test(...)]` takes a list of attributes
+  --> $DIR/doc-test-attr.rs:7:8
+   |
+LL | #![doc(test = "hello")]
+   |        ^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: unknown `doc(test)` attribute `a`
+  --> $DIR/doc-test-attr.rs:10:13
+   |
+LL | #![doc(test(a))]
+   |             ^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
+
+error: aborting due to 3 previous errors
+