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#include "stack.h"
#include <cgreen/cgreen.h>
#include <string.h>
Describe(Stack);
BeforeEach(Stack) {}
AfterEach(Stack) {}
Ensure(Stack, when_pushing_an_item_on_to_a_stack) {
Stack *stack = stack_init();
stack_push(stack, (void *)10);
assert_that(stack_size(stack), is_equal_to(1));
assert_that(stack_peek(stack), is_equal_to(10));
}
Ensure(Stack, when_pushing_multiple_items_on_to_a_stack) {
Stack *stack = stack_init();
stack_push(stack, (void *)20);
stack_push(stack, (void *)10);
stack_push(stack, (void *)50);
assert_that(stack_size(stack), is_equal_to(3));
assert_that(stack_peek(stack), is_equal_to(50));
}
Ensure(Stack, when_pushing_a_custom_type_on_to_a_stack) {
typedef struct {
} Item;
Stack *stack = stack_init();
Item *item = malloc(sizeof(Item));
stack_push(stack, item);
assert_that(stack_size(stack), is_equal_to(1));
assert_that(stack_peek(stack), is_equal_to(item));
assert_that(stack_pop(stack), is_equal_to(item));
}
Ensure(Stack, when_popping_an_item_off_of_a_stack) {
Stack *stack = stack_init();
stack_push(stack, (void *)20);
stack_push(stack, (void *)10);
stack_push(stack, (void *)50);
void *result = stack_pop(stack);
assert_that(stack_size(stack), is_equal_to(2));
assert_that(stack_peek(stack), is_equal_to(10));
assert_that(result, is_equal_to(50));
}
TestSuite *stack_tests() {
TestSuite *suite = create_test_suite();
add_test_with_context(suite, Stack, when_pushing_an_item_on_to_a_stack);
add_test_with_context(suite, Stack, when_pushing_multiple_items_on_to_a_stack);
add_test_with_context(suite, Stack, when_pushing_a_custom_type_on_to_a_stack);
add_test_with_context(suite, Stack, when_popping_an_item_off_of_a_stack);
return suite;
}
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