vyre-conform 0.1.0

Conformance suite for vyre backends — proves byte-identical output to CPU reference
Documentation 
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use super::super::*;
use super::super::load::load_rules;
use super::super::error::LoaderError;
use std::fs;
use tempfile::tempdir;

#[test]
fn test_load_valid_toml() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        version = "1"

        [[ops]]
        name = "add"
        arity = 2
        inputs = ["i32", "i32"]
        output = "i32"
        declared_laws = ["commutative"]
        reference_impl_id = "cpu_add"

        [[witnesses]]
        op = "add"
        seed = 42
        count = 100
        distribution = "uniform"
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let registry = load_rules(dir.path()).unwrap();

    assert_eq!(registry.ops.len(), 1);
    assert_eq!(registry.ops["add"].arity, 2);
    assert_eq!(registry.witnesses.len(), 1);
    assert_eq!(registry.witnesses[0].seed, 42);
}

#[test]
fn test_unsupported_version() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        version = "2"
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(matches!(err, LoaderError::UnsupportedVersion(v) if v == "2"));
}

#[test]
fn test_malformed_toml() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        version = "1"
        [[ops] # Missing bracket
        name = "add"
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(matches!(err, LoaderError::Parse(_)));
}

#[test]
fn test_conflicting_override() {
    let dir = tempdir().unwrap();
    let file_path1 = dir.path().join("rule1.toml");
    let file_path2 = dir.path().join("rule2.toml");

    let toml_content1 = r#"
        version = "1"
        [[ops]]
        name = "add"
        arity = 2
        inputs = ["i32", "i32"]
        output = "i32"
        declared_laws = []
        reference_impl_id = "cpu_add_1"
        "#;

    let toml_content2 = r#"
        version = "1"
        [[ops]]
        name = "add"
        arity = 2
        inputs = ["i32", "i32"]
        output = "i32"
        declared_laws = []
        reference_impl_id = "cpu_add_2"
        "#;

    fs::write(&file_path1, toml_content1).unwrap();
    fs::write(&file_path2, toml_content2).unwrap();

    let registry = load_rules(dir.path()).unwrap();
    assert_eq!(registry.ops.len(), 1);
    assert!(registry.ops["add"]
        .reference_impl_id
        .starts_with("cpu_add_"));
}

#[test]
fn test_missing_version_field() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        [[ops]]
        name = "add"
        arity = 2
        inputs = ["i32", "i32"]
        output = "i32"
        declared_laws = []
        reference_impl_id = "cpu_add"
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(matches!(err, LoaderError::Parse(_)));
}

#[test]
fn test_toml_too_large() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = format!(
        r#"
        version = "1"
        [[ops]]
        name = "add"
        arity = 2
        inputs = ["i32", "i32"]
        output = "i32"
        declared_laws = []
        reference_impl_id = "cpu_add"
        {}
        "#,
        "x".repeat(1_048_600)
    );

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(
        matches!(err, LoaderError::TomlTooLarge { bytes, .. } if bytes > 1_048_576),
        "expected TomlTooLarge, got: {err}"
    );
}

#[test]
fn test_unreasonable_witness_count() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        version = "1"
        [[witnesses]]
        op = "add"
        seed = 42
        count = 1000001
        distribution = "uniform"
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(
        matches!(err, LoaderError::UnreasonableCount { count: 1_000_001 }),
        "expected UnreasonableCount, got: {err}"
    );
}

#[test]
fn test_deny_unknown_fields() {
    let dir = tempdir().unwrap();
    let file_path = dir.path().join("rule.toml");

    let toml_content = r#"
        version = "1"
        unknown_field = true
        "#;

    fs::write(&file_path, toml_content).unwrap();

    let err = load_rules(dir.path()).unwrap_err();
    assert!(
        matches!(err, LoaderError::Parse(_)),
        "expected Parse error for unknown field, got: {err}"
    );
    let err_str = err.to_string();
    assert!(
        err_str.contains("unknown field") && err_str.contains("unknown_field"),
        "error should mention unknown field: {err_str}"
    );
}