Fill up codegen tests

Author: tyranron

juniper_codegen/src/graphql_input_object/derive.rs

@@ -149,10 +149,16 @@ fn parse_enum_variant(
         .map_err(diagnostic::emit_error)
         .ok()?;
 
+    let ignored = field_attr.ignore.is_some();
     if let Some(default) = &field_attr.default {
         ERR.emit_custom(
             default.span_ident(),
-            "field of `@oneOf` input object cannot have default value",
+            if ignored {
+                "`default` attribute argument has no meaning for ignored variants, as they are \
+                 never constructed"
+            } else {
+                "field cannot have default value in `@oneOf` input object"
+            },
         );
     }
 
@@ -185,7 +191,7 @@ fn parse_enum_variant(
         name,
         description: field_attr.description.map(SpanContainer::into_inner),
         deprecated: field_attr.deprecated.map(SpanContainer::into_inner),
-        ignored: field_attr.ignore.is_some(),
+        ignored,
     })
 }
 

tests/codegen/fail/input_object/derive_wrong_item.rs

@@ -0,0 +1,6 @@
+use juniper::GraphQLInputObject;
+
+#[derive(GraphQLInputObject)]
+union Test { id: i32 }
+
+fn main() {}

tests/codegen/fail/input_object/derive_wrong_item.stderr

@@ -0,0 +1,5 @@
+error: GraphQL input object cannot be derived on unions
+ --> fail/input_object/derive_wrong_item.rs:4:1
+  |
+4 | union Test { id: i32 }
+  | ^^^^^

tests/codegen/fail/input_object/enum/derive_all_variants_ignored.rs

@@ -0,0 +1,9 @@
+use juniper::GraphQLInputObject;
+
+#[derive(GraphQLInputObject)]
+enum Object {
+    #[graphql(ignore)]
+    Field(String),
+}
+
+fn main() {}

tests/codegen/fail/input_object/enum/derive_all_variants_ignored.stderr

@@ -0,0 +1,5 @@
+error: GraphQL input object expected at least 1 non-ignored field
+ --> fail/input_object/enum/derive_all_variants_ignored.rs:5:5
+  |
+5 |     #[graphql(ignore)]
+  |     ^

tests/codegen/fail/input_object/enum/derive_default_value.rs

@@ -0,0 +1,9 @@
+use juniper::GraphQLInputObject;
+
+#[derive(GraphQLInputObject)]
+enum Object {
+    #[graphql(default)]
+    Test(String),
+}
+
+fn main() {}

tests/codegen/fail/input_object/enum/derive_default_value.stderr

@@ -0,0 +1,6 @@
+error: GraphQL input object field cannot have default value in `@oneOf` input object
+       · note: https://spec.graphql.org/October2021#sec-Input-Objects
+ --> fail/input_object/enum/derive_default_value.rs:5:15
+  |
+5 |     #[graphql(default)]
+  |               ^^^^^^^

tests/codegen/fail/input_object/enum/derive_ignored_with_default_value.rs

@@ -0,0 +1,12 @@
+use juniper::GraphQLInputObject;
+
+#[derive(GraphQLInputObject)]
+enum Object {
+    Num(i32),
+    #[graphql(ignore, default = "none")]
+    Test(String),
+    #[graphql(skip, default)]
+    Test2(String),
+}
+
+fn main() {}

tests/codegen/fail/input_object/enum/derive_ignored_with_default_value.stderr

@@ -0,0 +1,13 @@
+error: GraphQL input object `default` attribute argument has no meaning for ignored variants, as they are never constructed
+       · note: https://spec.graphql.org/October2021#sec-Input-Objects
+ --> fail/input_object/enum/derive_ignored_with_default_value.rs:6:23
+  |
+6 |     #[graphql(ignore, default = "none")]
+  |                       ^^^^^^^
+
+error: GraphQL input object `default` attribute argument has no meaning for ignored variants, as they are never constructed
+       · note: https://spec.graphql.org/October2021#sec-Input-Objects
+ --> fail/input_object/enum/derive_ignored_with_default_value.rs:8:21
+  |
+8 |     #[graphql(skip, default)]
+  |                     ^^^^^^^

tests/codegen/fail/input_object/enum/derive_incompatible_field_type.rs

@@ -0,0 +1,13 @@
+use juniper::{GraphQLInputObject, GraphQLObject};
+
+#[derive(GraphQLObject)]
+struct ObjectA {
+    test: String,
+}
+
+#[derive(GraphQLInputObject)]
+enum Object {
+    Field(ObjectA),
+}
+
+fn main() {}