use alef::backends::rustler::RustlerBackend;
use alef::core::backend::Backend;
use alef::core::config::{ResolvedCrateConfig, new_config::NewAlefConfig};
use alef::core::ir::{ApiSurface, CoreWrapper, EnumDef, EnumVariant, FieldDef, PrimitiveType, TypeDef, TypeRef};
fn make_config(app_name: &str) -> ResolvedCrateConfig {
let crate_name = app_name.replace('_', "-");
let toml = format!(
r#"
[workspace]
languages = ["elixir"]
[[crates]]
name = "{crate_name}"
sources = ["src/lib.rs"]
[crates.elixir]
app_name = "{app_name}"
"#
);
let cfg: NewAlefConfig = toml::from_str(&toml).expect("test config must parse");
cfg.resolve().expect("test config must resolve").remove(0)
}
fn make_field(name: &str, ty: TypeRef, optional: bool, doc: &str) -> FieldDef {
FieldDef {
name: name.to_string(),
ty,
optional,
default: None,
doc: doc.to_string(),
sanitized: false,
is_boxed: false,
type_rust_path: None,
cfg: None,
typed_default: None,
core_wrapper: CoreWrapper::None,
vec_inner_core_wrapper: CoreWrapper::None,
newtype_wrapper: None,
serde_rename: None,
serde_flatten: false,
binding_excluded: false,
binding_exclusion_reason: None,
original_type: None,
}
}
fn find_module<'a>(generated: &'a [alef::core::backend::GeneratedFile], needle: &str) -> &'a str {
let module = generated
.iter()
.find(|f| {
let p = f.path.to_string_lossy();
p.contains(needle) && p.ends_with(".ex")
})
.unwrap_or_else(|| {
panic!(
"should generate module containing {needle}; got: {:?}",
generated
.iter()
.map(|f| f.path.to_string_lossy().to_string())
.collect::<Vec<_>>()
)
});
&module.content
}
#[test]
fn test_struct_module_emits_moduledoc_heredoc_when_doc_present() {
let struct_def = TypeDef {
name: "ProcessConfig".to_string(),
rust_path: "my_crate::ProcessConfig".to_string(),
original_rust_path: String::new(),
fields: vec![make_field("name", TypeRef::String, false, "")],
methods: vec![],
is_opaque: false,
is_clone: true,
is_copy: false,
is_trait: false,
has_default: false,
has_stripped_cfg_fields: false,
is_return_type: false,
serde_rename_all: None,
has_serde: false,
super_traits: vec![],
doc: "Configuration for a processing pipeline.\n\nDescribes the input and output channels.".to_string(),
cfg: None,
binding_excluded: false,
binding_exclusion_reason: None,
};
let config = make_config("test_app");
let api = ApiSurface {
crate_name: "test-app".to_string(),
version: "1.0.0".to_string(),
functions: vec![],
types: vec![struct_def],
enums: vec![],
errors: vec![],
excluded_type_paths: std::collections::HashMap::new(),
excluded_trait_names: ::std::collections::HashSet::new(),
};
let generated = RustlerBackend.generate_public_api(&api, &config).unwrap();
let content = find_module(&generated, "process_config");
assert!(
content.contains("@moduledoc \"\"\""),
"multi-line module doc must use heredoc form; got:\n{content}"
);
assert!(
content.contains("Configuration for a processing pipeline."),
"module doc body must be preserved; got:\n{content}"
);
assert!(
content.contains("Describes the input and output channels."),
"second paragraph must be preserved; got:\n{content}"
);
assert!(
content.contains("@typedoc"),
"@typedoc must be emitted; got:\n{content}"
);
let typedoc_pos = content.find("@typedoc").expect("@typedoc must be present");
let type_t_pos = content.find("@type t ::").expect("@type t must be present");
assert!(
typedoc_pos < type_t_pos,
"@typedoc must precede @type t; got:\n{content}"
);
}
#[test]
fn test_struct_module_emits_moduledoc_false_when_doc_empty() {
let struct_def = TypeDef {
name: "Anon".to_string(),
rust_path: "my_crate::Anon".to_string(),
original_rust_path: String::new(),
fields: vec![make_field("v", TypeRef::Primitive(PrimitiveType::U32), false, "")],
methods: vec![],
is_opaque: false,
is_clone: true,
is_copy: false,
is_trait: false,
has_default: false,
has_stripped_cfg_fields: false,
is_return_type: false,
serde_rename_all: None,
has_serde: false,
super_traits: vec![],
doc: String::new(),
cfg: None,
binding_excluded: false,
binding_exclusion_reason: None,
};
let config = make_config("test_app");
let api = ApiSurface {
crate_name: "test-app".to_string(),
version: "1.0.0".to_string(),
functions: vec![],
types: vec![struct_def],
enums: vec![],
errors: vec![],
excluded_type_paths: std::collections::HashMap::new(),
excluded_trait_names: ::std::collections::HashSet::new(),
};
let generated = RustlerBackend.generate_public_api(&api, &config).unwrap();
let content = find_module(&generated, "anon");
assert!(
content.contains("@moduledoc false"),
"docless module must emit @moduledoc false; got:\n{content}"
);
assert!(
!content.contains("@typedoc"),
"docless module must not emit @typedoc; got:\n{content}"
);
}
#[test]
fn test_unit_enum_module_emits_doc_on_each_variant_accessor() {
let enum_def = EnumDef {
name: "Severity".to_string(),
rust_path: "my_crate::Severity".to_string(),
original_rust_path: String::new(),
variants: vec![
EnumVariant {
name: "Error".into(),
fields: vec![],
is_tuple: false,
doc: "A blocking issue.".into(),
is_default: false,
serde_rename: None,
},
EnumVariant {
name: "Warning".into(),
fields: vec![],
is_tuple: false,
doc: "A non-blocking caveat.".into(),
is_default: false,
serde_rename: None,
},
],
doc: "Severity levels for diagnostics.".into(),
cfg: None,
is_copy: false,
has_serde: false,
serde_tag: None,
serde_untagged: false,
serde_rename_all: None,
binding_excluded: false,
binding_exclusion_reason: None,
};
let config = make_config("test_app");
let api = ApiSurface {
crate_name: "test-app".to_string(),
version: "1.0.0".to_string(),
functions: vec![],
types: vec![],
enums: vec![enum_def],
errors: vec![],
excluded_type_paths: std::collections::HashMap::new(),
excluded_trait_names: ::std::collections::HashSet::new(),
};
let generated = RustlerBackend.generate_public_api(&api, &config).unwrap();
let content = find_module(&generated, "severity");
assert!(
content.contains("@moduledoc"),
"enum module must emit @moduledoc; got:\n{content}"
);
assert!(
content.contains("Severity levels for diagnostics."),
"enum @moduledoc body must be preserved; got:\n{content}"
);
assert!(
content.contains("@typedoc"),
"unit enum should emit @typedoc on @type t; got:\n{content}"
);
assert!(
content.contains("A blocking issue."),
"Error variant doc must appear in @doc above accessor; got:\n{content}"
);
assert!(
content.contains("A non-blocking caveat."),
"Warning variant doc must appear in @doc above accessor; got:\n{content}"
);
let doc_pos = content.find("A blocking issue.").unwrap();
let def_error_pos = content
.find("def error,")
.unwrap_or_else(|| content.find("def error ").unwrap_or(usize::MAX));
assert!(
doc_pos < def_error_pos,
"@doc must precede def for variant accessor; got:\n{content}"
);
}
#[test]
fn test_data_enum_module_emits_typedoc_on_each_variant_alias() {
let enum_def = EnumDef {
name: "Diagnostic".to_string(),
rust_path: "my_crate::Diagnostic".to_string(),
original_rust_path: String::new(),
variants: vec![
EnumVariant {
name: "Error".into(),
fields: vec![FieldDef {
name: "msg".into(),
ty: TypeRef::String,
optional: false,
default: None,
doc: String::new(),
sanitized: false,
is_boxed: false,
type_rust_path: None,
cfg: None,
typed_default: None,
core_wrapper: CoreWrapper::None,
vec_inner_core_wrapper: CoreWrapper::None,
newtype_wrapper: None,
serde_rename: None,
serde_flatten: false,
binding_excluded: false,
binding_exclusion_reason: None,
original_type: None,
}],
is_tuple: false,
doc: "Hard failure diagnostic.".into(),
is_default: false,
serde_rename: None,
},
EnumVariant {
name: "Warning".into(),
fields: vec![FieldDef {
name: "msg".into(),
ty: TypeRef::String,
optional: false,
default: None,
doc: String::new(),
sanitized: false,
is_boxed: false,
type_rust_path: None,
cfg: None,
typed_default: None,
core_wrapper: CoreWrapper::None,
vec_inner_core_wrapper: CoreWrapper::None,
newtype_wrapper: None,
serde_rename: None,
serde_flatten: false,
binding_excluded: false,
binding_exclusion_reason: None,
original_type: None,
}],
is_tuple: false,
doc: "Soft warning diagnostic.".into(),
is_default: false,
serde_rename: None,
},
],
doc: "All diagnostic variants emitted by the analyzer.".into(),
cfg: None,
is_copy: false,
has_serde: false,
serde_tag: None,
serde_untagged: false,
serde_rename_all: None,
binding_excluded: false,
binding_exclusion_reason: None,
};
let config = make_config("test_app");
let api = ApiSurface {
crate_name: "test-app".to_string(),
version: "1.0.0".to_string(),
functions: vec![],
types: vec![],
enums: vec![enum_def],
errors: vec![],
excluded_type_paths: std::collections::HashMap::new(),
excluded_trait_names: ::std::collections::HashSet::new(),
};
let generated = RustlerBackend.generate_public_api(&api, &config).unwrap();
let content = find_module(&generated, "diagnostic");
assert!(
content.contains("All diagnostic variants emitted by the analyzer."),
"data-enum @moduledoc body must be preserved; got:\n{content}"
);
assert!(
content.contains("Hard failure diagnostic."),
"Error variant doc must appear in @typedoc above type alias; got:\n{content}"
);
assert!(
content.contains("Soft warning diagnostic."),
"Warning variant doc must appear in @typedoc above type alias; got:\n{content}"
);
let typedoc_idx = content.find("Hard failure diagnostic.").unwrap();
let alias_idx = content
.find("@type error ::")
.or_else(|| content.find("@type :\"Error\" ::"))
.expect("variant type alias must be present");
assert!(
typedoc_idx < alias_idx,
"variant @typedoc must precede its @type alias; got:\n{content}"
);
}