Rollup merge of #93660 - aDotInTheVoid:rustdoc-type-tests, r=CraftSpider

rustdoc-json: Add some tests for typealias item

r? ```@CraftSpider```

Improves https://github.com/rust-lang/rust/issues/81359

The test's arn't pretty, and I think eventually we need a better way of doing repeated tests on a deeply nested path,
without repeating the way to get to that path

```@rustbot``` modify labels: +A-rustdoc-json +T-rustdoc +A-rustdoc +A-testsuite

3 files changed, 82 insertions, 0 deletions

diff --git a/src/test/rustdoc-json/type/dyn.rs b/src/test/rustdoc-json/type/dyn.rs
new file mode 100644
index 00000000000..f53dc03f4b4
--- /dev/null
+++ b/src/test/rustdoc-json/type/dyn.rs
@@ -0,0 +1,21 @@
+// ignore-tidy-linelength
+
+// @count dyn.json "$.index[*][?(@.name=='dyn')].inner.items" 1
+// @set sync_int_gen = - "$.index[*][?(@.name=='SyncIntGen')].id"
+// @is - "$.index[*][?(@.name=='dyn')].inner.items[0]" $sync_int_gen
+
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].kind" \"typedef\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.generics" '{"params": [], "where_predicates": []}'
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.kind" \"resolved_path\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.name" \"Box\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.bindings" []
+// @count - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args" 1
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.kind" \"resolved_path\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.kind" \"resolved_path\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.name" \"Fn\"
+// @count - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.param_names[*]" 3
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.param_names[0].trait_bound.trait.inner.name" \"Send\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.param_names[1].trait_bound.trait.inner.name" \"Sync\"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.param_names[2]" "{\"outlives\": \"'static\"}"
+// @is    - "$.index[*][?(@.name=='SyncIntGen')].inner.type.inner.args.angle_bracketed.args[0].type.inner.args" '{"parenthesized": {"inputs": [],"output": {"inner": "i32","kind": "primitive"}}}'
+pub type SyncIntGen = Box<dyn Fn() -> i32 + Send + Sync + 'static>;
diff --git a/src/test/rustdoc-json/type/fn_lifetime.rs b/src/test/rustdoc-json/type/fn_lifetime.rs
new file mode 100644
index 00000000000..e0d1e9649a0
--- /dev/null
+++ b/src/test/rustdoc-json/type/fn_lifetime.rs
@@ -0,0 +1,28 @@
+// ignore-tidy-linelength
+
+// @is fn_lifetime.json "$.index[*][?(@.name=='GenericFn')].kind" \"typedef\"
+
+// @count - "$.index[*][?(@.name=='GenericFn')].inner.generics.params[*]" 1
+// @is    - "$.index[*][?(@.name=='GenericFn')].inner.generics.params[*].name" \"\'a\"
+// @has   - "$.index[*][?(@.name=='GenericFn')].inner.generics.params[*].kind.lifetime"
+// @count - "$.index[*][?(@.name=='GenericFn')].inner.generics.params[*].kind.lifetime.outlives[*]" 0
+// @count - "$.index[*][?(@.name=='GenericFn')].inner.generics.where_predicates[*]" 0
+// @is    - "$.index[*][?(@.name=='GenericFn')].inner.type.kind" \"function_pointer\"
+// @count - "$.index[*][?(@.name=='GenericFn')].inner.type.inner.generic_params[*]" 0
+// @count - "$.index[*][?(@.name=='GenericFn')].inner.type.inner.decl.inputs[*]" 1
+// @is    - "$.index[*][?(@.name=='GenericFn')].inner.type.inner.decl.inputs[*][1].inner.lifetime" \"\'a\"
+// @is    - "$.index[*][?(@.name=='GenericFn')].inner.type.inner.decl.output.inner.lifetime" \"\'a\"
+
+pub type GenericFn<'a> = fn(&'a i32) -> &'a i32;
+
+// @is fn_lifetime.json "$.index[*][?(@.name=='ForAll')].kind" \"typedef\"
+// @count - "$.index[*][?(@.name=='ForAll')].inner.generics.params[*]" 0
+// @count - "$.index[*][?(@.name=='ForAll')].inner.generics.where_predicates[*]" 0
+// @count - "$.index[*][?(@.name=='ForAll')].inner.type.inner.generic_params[*]" 1
+// @is    - "$.index[*][?(@.name=='ForAll')].inner.type.inner.generic_params[*].name" \"\'a\"
+// @has   - "$.index[*][?(@.name=='ForAll')].inner.type.inner.generic_params[*].kind.lifetime"
+// @count - "$.index[*][?(@.name=='ForAll')].inner.type.inner.generic_params[*].kind.lifetime.outlives[*]" 0
+// @count - "$.index[*][?(@.name=='ForAll')].inner.type.inner.decl.inputs[*]" 1
+// @is    - "$.index[*][?(@.name=='ForAll')].inner.type.inner.decl.inputs[*][1].inner.lifetime" \"\'a\"
+// @is    - "$.index[*][?(@.name=='ForAll')].inner.type.inner.decl.output.inner.lifetime" \"\'a\"
+pub type ForAll = for<'a> fn(&'a i32) -> &'a i32;
diff --git a/src/test/rustdoc-json/type/generic_default.rs b/src/test/rustdoc-json/type/generic_default.rs
new file mode 100644
index 00000000000..b6bb6dcc5fe
--- /dev/null
+++ b/src/test/rustdoc-json/type/generic_default.rs
@@ -0,0 +1,33 @@
+// ignore-tidy-linelength
+
+// @set result = generic_default.json "$.index[*][?(@.name=='Result')].id"
+pub enum Result<T, E> {
+    Ok(T),
+    Err(E),
+}
+
+// @set my_error = - "$.index[*][?(@.name=='MyError')].id"
+pub struct MyError {}
+
+// @is    - "$.index[*][?(@.name=='MyResult')].kind" \"typedef\"
+// @count - "$.index[*][?(@.name=='MyResult')].inner.generics.where_predicates[*]" 0
+// @count - "$.index[*][?(@.name=='MyResult')].inner.generics.params[*]" 2
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[0].name" \"T\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].name" \"E\"
+// @has   - "$.index[*][?(@.name=='MyResult')].inner.generics.params[0].kind.type"
+// @has   - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].kind.type"
+// @count - "$.index[*][?(@.name=='MyResult')].inner.generics.params[0].kind.type.bounds[*]" 0
+// @count - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].kind.type.bounds[*]" 0
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[0].kind.type.default" null
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].kind.type.default.kind" \"resolved_path\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].kind.type.default.inner.id" $my_error
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.generics.params[1].kind.type.default.inner.name" \"MyError\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.kind" \"resolved_path\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.id" $result
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.name" \"Result\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.args.angle_bracketed.bindings" []
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.args.angle_bracketed.args[0].type.kind" \"generic\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.args.angle_bracketed.args[1].type.kind" \"generic\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.args.angle_bracketed.args[0].type.inner" \"T\"
+// @is    - "$.index[*][?(@.name=='MyResult')].inner.type.inner.args.angle_bracketed.args[1].type.inner" \"E\"
+pub type MyResult<T, E = MyError> = Result<T, E>;