#include "env.h"
#include "unity.h"

#include <string.h>

static am_t am;

void setUp(void)
{
	am_init(&am);
}

void tearDown(void)
{
}

static void test_set_foo_to_42_then_fetch(void)
{
	am.regs[EXPR] = expr_str_symbol(&am, "foo");
	am.regs[VAL] = expr_integer(&am, 42);
	env_set(&am);

	am.regs[EXPR] = expr_str_symbol(&am, "foo");
	am.regs[VAL] = NULL;
	env_fetch(&am);

	TEST_ASSERT_NOT_NULL(am.regs[VAL]);
	TEST_ASSERT_TRUE(am.regs[VAL]->is_atom);
	TEST_ASSERT_EQUAL(ATOM_TYPE_INTEGER, am.regs[VAL]->atom.type);
	TEST_ASSERT_EQUAL(42, am.regs[VAL]->atom.integer);
}

static void test_update_foo_from_123_to_456_then_fetch(void)
{
	am.regs[EXPR] = expr_str_symbol(&am, "foo");
	am.regs[VAL] = expr_integer(&am, 123);
	env_set(&am);
	am.regs[VAL] = expr_integer(&am, 456);
	env_set(&am);

	am.regs[EXPR] = expr_str_symbol(&am, "foo");
	am.regs[VAL] = NULL;
	env_fetch(&am);

	TEST_ASSERT_NOT_NULL(am.regs[VAL]);
	TEST_ASSERT_TRUE(am.regs[VAL]->is_atom);
	TEST_ASSERT_EQUAL(ATOM_TYPE_INTEGER, am.regs[VAL]->atom.type);
	TEST_ASSERT_EQUAL(456, am.regs[VAL]->atom.integer);
}

int main(void)
{
	UNITY_BEGIN();
	RUN_TEST(test_set_foo_to_42_then_fetch);
	RUN_TEST(test_update_foo_from_123_to_456_then_fetch);
	return UNITY_END();
}