Updated test #64

mist-test/src/items/function_test.mist

@@ -0,0 +1,64 @@
+fn greet() {
+    let mut x = 1;
+    x++;
+}
+
+pub fn test_basic_function() {
+    greet();
+}
+
+fn add(a i32, b i32) i32 {
+    a + b
+}
+
+pub fn test_fn_params() {
+    assert_eq!(add(2, 3), 5);
+}
+
+pub fn test_fn_return() i32 {
+    42
+}
+
+pub fn test_fn_early_return() i32 {
+    return 100;
+    0
+}
+
+pub fn test_fn_mut_param(mut x i32) i32 {
+    x = x + 10;
+    x
+}
+
+pub fn test_method_call() {
+    let s = "hello";
+    assert_eq!(s.len(), 5);
+    assert_eq!(s.to_uppercase(), "HELLO");
+}
+
+fn triple(x i32) i32 {
+    add(x, add(x, x))
+}
+
+pub fn test_nested_fn_calls() {
+    assert_eq!(triple(5), 15);
+}
+
+fn factorial(n i32) i32 {
+    if (n <= 1) 1
+    else n * factorial(n - 1)
+}
+
+pub fn test_recursive_fn() {
+    assert_eq!(factorial(5), 120);
+}
+
+pub fn run_tests() {
+    test_basic_function();
+    test_fn_params();
+    assert_eq!(test_fn_return(), 42);
+    assert_eq!(test_fn_early_return(), 100);
+    assert_eq!(test_fn_mut_param(5), 15);
+    test_method_call();
+    test_nested_fn_calls();
+    test_recursive_fn();
+}