print("\n--- Test: basic imports ---");

// Import by path (with alias) - relative to this file's directory
import "mod_hello.bob" as H;
assert(type(H) == "module", "module is module");
assert(H.X == 5, "exported var");
assert(H.greet("bob") == "hi bob", "exported func");
// from-import by path (relative)
from "mod_hello.bob" import greet as g;
assert(g("amy") == "hi amy", "from-import works");

// Import by name (search current directory)
import mod_hello as M;
assert(M.X == 5 && M.greet("zoe") == "hi zoe", "import by name");

// From-import by name (skip under main suite; covered by path test)
// from mod_hello import greet as g2;
// assert(g2("x") == "hi x", "from-import by name");

// Import by path without alias (relative)
import "mod_hello.bob";
assert(type(mod_hello) == "module" && mod_hello.X == 5, "import without as binds basename");

// Multiple imports do not re-exec
var before = mod_hello.X;
import "mod_hello.bob";
var after = mod_hello.X;
assert(before == after, "module executed once (cached)");

// Cross-file visibility in same interpreter: eval user file after importing here
import eval as E;
E.evalFile("tests/import_user_of_mod_hello.bob");

// Immutability: cannot reassign module binding
var immFail = false;
try { mod_hello = 123; } catch (e) { immFail = true; }
assert(immFail == true, "module binding is immutable");

// Immutability: cannot assign to module properties
var immProp = false;
try { mod_hello.newProp = 1; } catch (e) { immProp = true; }
assert(immProp == true, "module properties are immutable");

// Type should be module
assert(type(mod_hello) == "module", "module type tag");

print("basic imports: PASS");