Rollup merge of rust-lang#93660 - aDotInTheVoid:rustdoc-type-tests, r…

…=CraftSpider

rustdoc-json: Add some tests for typealias item

r? ```@CraftSpider```

Improves rust-lang#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

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>;

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;

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>;

src/tools/jsondocck/src/main.rs

@@ -231,7 +231,21 @@ fn check_command(command: Command, cache: &mut Cache) -> Result<(), CkError> {
 
             let val = cache.get_value(&command.args[0])?;
             let results = select(&val, &command.args[1]).unwrap();
-            results.len() == expected
+            let eq = results.len() == expected;
+            if !command.negated && !eq {
+                return Err(CkError::FailedCheck(
+                    format!(
+                        "`{}` matched to `{:?}` with length {}, but expected length {}",
+                        &command.args[1],
+                        results,
+                        results.len(),
+                        expected
+                    ),
+                    command,
+                ));
+            } else {
+                eq
+            }
         }
         CommandKind::Is => {
             // @has <path> <jsonpath> <value> = check *exactly one* item matched by path, and it equals value
@@ -317,6 +331,6 @@ fn string_to_value<'a>(s: &str, cache: &'a Cache) -> Cow<'a, Value> {
             panic!("No variable: `{}`. Current state: `{:?}`", &s[1..], cache.variables)
         }))
     } else {
-        Cow::Owned(serde_json::from_str(s).unwrap())
+        Cow::Owned(serde_json::from_str(s).expect(&format!("Cannot convert `{}` to json", s)))
     }
 }