cemc 0.1.2

Cem language compiler - A concatenative language with green threads and linear types
Documentation 
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/**
 * Test program for Cem runtime
 */

#include "stack.h"
#include <assert.h>
#include <stdio.h>
#include <string.h>

void test_push_and_drop() {
  printf("Testing push and drop...\n");

  StackCell *stack = NULL;
  stack = push_int(stack, 42);
  assert(stack != NULL);
  assert(stack->tag == TAG_INT);
  assert(stack->value.i == 42);

  stack = drop(stack);
  assert(stack == NULL);

  printf("  ✓ push_int and drop work\n");
}

void test_arithmetic() {
  printf("Testing arithmetic...\n");

  // Test: 10 20 + => 30
  StackCell *stack = NULL;
  stack = push_int(stack, 10);
  stack = push_int(stack, 20);
  stack = add(stack);
  assert(stack->value.i == 30);
  free_stack(stack);

  // Test: 10 3 - => 7
  stack = NULL;
  stack = push_int(stack, 10);
  stack = push_int(stack, 3);
  stack = subtract(stack);
  assert(stack->value.i == 7);
  free_stack(stack);

  // Test: 6 7 * => 42
  stack = NULL;
  stack = push_int(stack, 6);
  stack = push_int(stack, 7);
  stack = multiply(stack);
  assert(stack->value.i == 42);
  free_stack(stack);

  // Test: 20 4 / => 5
  stack = NULL;
  stack = push_int(stack, 20);
  stack = push_int(stack, 4);
  stack = divide_op(stack);
  assert(stack->value.i == 5);
  free_stack(stack);

  printf("  ✓ add, subtract, multiply, divide work\n");
}

void test_stack_ops() {
  printf("Testing stack operations...\n");

  // Test dup: 42 dup => 42 42
  StackCell *stack = NULL;
  stack = push_int(stack, 42);
  stack = dup(stack);
  assert(stack->value.i == 42);
  assert(stack->next->value.i == 42);
  free_stack(stack);

  // Test swap: 1 2 swap => 2 1
  stack = NULL;
  stack = push_int(stack, 1);
  stack = push_int(stack, 2);
  stack = swap(stack);
  assert(stack->value.i == 1);
  assert(stack->next->value.i == 2);
  free_stack(stack);

  // Test over: 1 2 over => 1 2 1
  stack = NULL;
  stack = push_int(stack, 1);
  stack = push_int(stack, 2);
  stack = over(stack);
  assert(stack->value.i == 1);
  assert(stack->next->value.i == 2);
  assert(stack->next->next->value.i == 1);
  free_stack(stack);

  printf("  ✓ dup, swap, over work\n");
}

void test_comparisons() {
  printf("Testing comparisons...\n");

  // Test <
  StackCell *stack = NULL;
  stack = push_int(stack, 5);
  stack = push_int(stack, 10);
  stack = less_than(stack);
  assert(stack->tag == TAG_BOOL);
  assert(stack->value.b == true);
  free_stack(stack);

  // Test >
  stack = NULL;
  stack = push_int(stack, 10);
  stack = push_int(stack, 5);
  stack = greater_than(stack);
  assert(stack->value.b == true);
  free_stack(stack);

  // Test =
  stack = NULL;
  stack = push_int(stack, 42);
  stack = push_int(stack, 42);
  stack = equal(stack);
  assert(stack->value.b == true);
  free_stack(stack);

  printf("  ✓ less_than, greater_than, equal work\n");
}

void test_strings() {
  printf("Testing strings...\n");

  StackCell *stack = NULL;
  stack = push_string(stack, "hello");
  assert(stack->tag == TAG_STRING);
  assert(strcmp(stack->value.s, "hello") == 0);

  stack = push_string(stack, "world");
  stack = equal(stack);
  assert(stack->value.b == false);
  free_stack(stack);

  stack = NULL;
  stack = push_string(stack, "test");
  stack = push_string(stack, "test");
  stack = equal(stack);
  assert(stack->value.b == true);
  free_stack(stack);

  printf("  ✓ push_string and string equality work\n");
}

void test_example_program() {
  printf("Testing example: (5 + 3) * 2...\n");

  // Simulates: 5 3 + 2 *
  StackCell *stack = NULL;
  stack = push_int(stack, 5);
  stack = push_int(stack, 3);
  stack = add(stack); // Stack: 8
  stack = push_int(stack, 2);
  stack = multiply(stack); // Stack: 16

  assert(stack->value.i == 16);
  free_stack(stack);

  printf("  ✓ Example program: result = 16\n");
}

int main() {
  printf("=== Cem Runtime Tests ===\n\n");

  test_push_and_drop();
  test_arithmetic();
  test_stack_ops();
  test_comparisons();
  test_strings();
  test_example_program();

  printf("\n✅ All runtime tests passed!\n");
  return 0;
}