harn-vm 0.10.33

Async bytecode virtual machine for the Harn programming language
Documentation 
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use super::output::*;
use super::*;

#[test]
fn parses_explicit_json_schema_output() {
    let mut spec = crate::value::DictMap::new();
    spec.insert(
        crate::value::intern_key("schema"),
        VmValue::dict(crate::value::DictMap::from_iter([(
            crate::value::intern_key("type"),
            VmValue::String(arcstr::ArcStr::from("object")),
        )])),
    );
    spec.insert(crate::value::intern_key("strict"), VmValue::Bool(false));
    let options = crate::value::DictMap::from_iter([(
        crate::value::intern_key("output"),
        VmValue::dict(spec),
    )]);

    let parsed = parse_output_option(Some(&options)).expect("output");

    assert_eq!(
        parsed.format,
        crate::llm::api::OutputFormat::JsonSchema {
            schema: serde_json::json!({"type": "object"}),
            strict: false,
        }
    );
}

#[test]
fn normalizes_harn_schema_types_for_provider_output() {
    let schema = crate::schema::json_to_vm_value(&serde_json::json!({
        "type": "dict",
        "properties": {
            "items": {
                "type": "list",
                "items": {"type": "int"},
                "x-provider-extension": {"mode": "strict"}
            }
        }
    }));

    let parsed = parse_schema_value(Some(&schema), "output")
        .expect("valid Harn schema")
        .expect("present schema");

    assert_eq!(parsed["type"], "object");
    assert_eq!(parsed["properties"]["items"]["type"], "array");
    assert_eq!(parsed["properties"]["items"]["items"]["type"], "integer");
    assert_eq!(
        parsed["properties"]["items"]["x-provider-extension"]["mode"],
        "strict"
    );
}

#[test]
fn normalizes_harn_schema_types_in_unions_and_type_arrays() {
    // The completion-judge schema that regressed llama.cpp nests aliases in
    // positions the two happy-path tests do not cover: `anyOf` branches, a
    // union `type` array, and the `float`/`nil` scalar siblings. Pin them so a
    // future normalizer refactor cannot silently reopen the strict-grammar 400.
    let schema = crate::schema::json_to_vm_value(&serde_json::json!({
        "type": "dict",
        "properties": {
            "verdict": {"anyOf": [{"type": "bool"}, {"type": "nil"}]},
            "score": {"type": "float"},
            "tags": {"type": ["list", "nil"]}
        }
    }));

    let parsed = parse_schema_value(Some(&schema), "output")
        .expect("valid Harn schema")
        .expect("present schema");

    assert_eq!(parsed["type"], "object");
    assert_eq!(
        parsed["properties"]["verdict"]["anyOf"][0]["type"],
        "boolean"
    );
    assert_eq!(parsed["properties"]["verdict"]["anyOf"][1]["type"], "null");
    assert_eq!(parsed["properties"]["score"]["type"], "number");
    assert_eq!(
        parsed["properties"]["tags"]["type"],
        serde_json::json!(["array", "null"])
    );
}

#[test]
fn parser_does_not_revive_removed_output_synonyms() {
    // W2 collapsed the `response_format` / `json_schema` / top-level `schema`
    // spellings onto the single canonical `output` key. `parse_output_option`
    // no longer reads the legacy keys, so a call carrying only them lowers to
    // plain text output — guarding against an accidental synonym revival.
    let schema = crate::value::DictMap::from_iter([(
        crate::value::intern_key("type"),
        VmValue::String(arcstr::ArcStr::from("object")),
    )]);
    let options = crate::value::DictMap::from_iter([
        (
            crate::value::intern_key("response_format"),
            VmValue::String(arcstr::ArcStr::from("json")),
        ),
        (
            crate::value::intern_key("json_schema"),
            VmValue::dict(schema),
        ),
    ]);

    let parsed = parse_output_option(Some(&options)).expect("output");

    assert_eq!(parsed.format, crate::llm::api::OutputFormat::Text);
}

#[test]
fn rejects_json_schema_when_capability_is_absent() {
    crate::llm::capabilities::clear_user_overrides();
    let err = validate_output_format_supported(
        &crate::llm::api::OutputFormat::JsonSchema {
            schema: serde_json::json!({"type": "object"}),
            strict: true,
        },
        "custom-provider",
        "custom-model",
        &crate::llm::capabilities::lookup("custom-provider", "custom-model"),
    )
    .expect_err("unsupported structured output should fail");

    assert!(err
        .to_string()
        .contains("option `output` is not supported by `custom-model`"));
}

#[test]
fn accepts_json_schema_when_capability_declares_strategy() {
    crate::llm::capabilities::set_user_overrides_toml(
        r#"
[[provider.custom-provider]]
model_match = "*"
structured_output = "format_kw"
"#,
    )
    .expect("capability override");

    validate_output_format_supported(
        &crate::llm::api::OutputFormat::JsonSchema {
            schema: serde_json::json!({"type": "object"}),
            strict: true,
        },
        "custom-provider",
        "custom-model",
        &crate::llm::capabilities::lookup("custom-provider", "custom-model"),
    )
    .expect("supported structured output");
    crate::llm::capabilities::clear_user_overrides();
}