bashrs 6.66.0

Rust-to-Shell transpiler for deterministic bootstrap scripts
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use super::*;

#[test]
fn test_contract_system_creation() {
    let system = ContractSystem::new();
    assert!(system.function_sigs.contains_key("echo"));
    assert!(system.function_sigs.contains_key("test"));
    assert!(system.function_sigs.contains_key("read"));
}

#[test]
fn test_type_inference_basic() {
    let mut system = ContractSystem::new();

    let context = TypeContext::Assignment {
        value_type: ShellType::String,
    };

    let inferred_type = system.infer_variable_type("var1", &context);
    assert!(matches!(inferred_type, ShellType::TypeVar(_)));

    // Solve constraints
    assert!(system.solve_constraints().is_ok());

    // Check that variable now has string type
    let final_type = system.get_variable_type("var1").unwrap();
    assert_eq!(*final_type, ShellType::String);
}

#[test]
fn test_function_call_inference() {
    let mut system = ContractSystem::new();

    let context = TypeContext::FunctionCall {
        function: "echo".to_string(),
        param_index: 0,
    };

    let inferred_type = system.infer_variable_type("args", &context);
    assert!(matches!(inferred_type, ShellType::TypeVar(_)));

    assert!(system.solve_constraints().is_ok());

    let final_type = system.get_variable_type("args").unwrap();
    assert!(matches!(final_type, ShellType::Array(_)));
}

#[test]
fn test_arithmetic_context_inference() {
    let mut system = ContractSystem::new();

    let context = TypeContext::Arithmetic;
    let _inferred_type = system.infer_variable_type("num", &context);

    assert!(system.solve_constraints().is_ok());

    let final_type = system.get_variable_type("num").unwrap();
    assert_eq!(*final_type, ShellType::Integer);
}

#[test]
fn test_contract_validation() {
    let mut system = ContractSystem::new();

    // Add a variable with string type
    system
        .type_env
        .insert("var1".to_string(), ShellType::String);

    // Add a contract expecting integer type
    let contract = Contract {
        kind: ContractKind::TypeAnnotation,
        condition: ContractCondition::TypeConstraint {
            var: "var1".to_string(),
            expected_type: ShellType::Integer,
        },
        description: "var1 should be integer".to_string(),
        location: Span::new(BytePos(0), BytePos(10)),
    };

    system.add_contract(contract);

    let violations = system.validate_contracts();
    assert_eq!(violations.len(), 1);
    assert!(violations[0]
        .reason
        .contains("has type string but expected integer"));
}

#[test]
fn test_non_null_contract() {
    let mut system = ContractSystem::new();

    let contract = Contract {
        kind: ContractKind::Precondition,
        condition: ContractCondition::NonNull {
            var: "undefined_var".to_string(),
        },
        description: "Variable must be defined".to_string(),
        location: Span::new(BytePos(0), BytePos(10)),
    };

    system.add_contract(contract);

    let violations = system.validate_contracts();
    assert_eq!(violations.len(), 1);
    assert!(violations[0].reason.contains("is not defined"));
}

#[test]
fn test_function_signature_registration() {
    let mut system = ContractSystem::new();

    let custom_func = FunctionSignature {
        name: "custom_func".to_string(),
        parameters: vec![Parameter {
            name: "input".to_string(),
            param_type: ShellType::String,
            is_optional: false,
        }],
        return_type: ShellType::Boolean,
        preconditions: vec![],
        postconditions: vec![],
    };

    system.register_function(custom_func);
    assert!(system.function_sigs.contains_key("custom_func"));
}

#[test]
fn test_shell_type_compatibility() {
    let string_type = ShellType::String;
    let int_type = ShellType::Integer;
    let union_type = ShellType::Union(vec![ShellType::String, ShellType::Integer]);

    assert!(string_type.is_compatible(&string_type));
    assert!(!string_type.is_compatible(&int_type));
    assert!(union_type.is_compatible(&string_type));
    assert!(union_type.is_compatible(&int_type));
}

#[test]
fn test_array_type_inference() {
    let mut system = ContractSystem::new();

    // Test array type unification
    let array_str = ShellType::Array(Box::new(ShellType::String));
    let type_var = system.inference_engine.fresh_type_var();

    let constraint = TypeConstraint {
        left: type_var.clone(),
        right: array_str.clone(),
        location: Span::new(BytePos(0), BytePos(10)),
        reason: ConstraintReason::Assignment,
    };

    system.inference_engine.add_constraint(constraint);
    assert!(system.solve_constraints().is_ok());
}

#[test]
fn test_contract_condition_logic() {
    let type_constraint = ContractCondition::TypeConstraint {
        var: "x".to_string(),
        expected_type: ShellType::String,
    };

    let non_null_constraint = ContractCondition::NonNull {
        var: "y".to_string(),
    };

    let and_condition =
        ContractCondition::And(Box::new(type_constraint), Box::new(non_null_constraint));

    // Test that we can construct complex logical conditions
    match and_condition {
        ContractCondition::And(_, _) => {}
        _ => panic!("Should be And condition"),
    }
}