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#include "min_stack.h"
#include <cgreen/cgreen.h>
Describe(MinStack);
BeforeEach(MinStack) {}
AfterEach(MinStack) {}
Ensure(MinStack, when_empty) {
Stack *stack = initialize();
assert_that(size(stack), is_equal_to(0));
assert_that(min(stack), is_equal_to(NULL));
assert_that(pop(stack), is_equal_to(NULL));
free(stack);
}
Ensure(MinStack, when_empty_it_has_a_size_of_zero) {
Stack *stack = initialize();
assert_that(size(stack), is_equal_to(0));
free(stack);
}
Ensure(MinStack, when_empty_it_has_a_min_of_null) {
Stack *stack = initialize();
assert_that(min(stack), is_equal_to(NULL));
free(stack);
}
Ensure(MinStack, when_a_single_item_is_on_the_stack_it_has_a_size_of_one) {
Stack *stack = initialize();
push(stack, 1);
assert_that(size(stack), is_equal_to(1));
free(stack);
}
Ensure(MinStack, when_a_single_item_is_on_the_stack_it_is_the_min) {
Stack *stack = initialize();
push(stack, -100);
assert_that(min(stack), is_equal_to(-100));
free(stack);
}
Ensure(
MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_the_item) {
Stack *stack = initialize();
push(stack, 200);
assert_that(pop(stack), is_equal_to(200));
free(stack);
}
Ensure(
MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_a_size_of_zero) {
Stack *stack = initialize();
push(stack, 200);
pop(stack);
assert_that(size(stack), is_equal_to(0));
free(stack);
}
Ensure(
MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_a_min_of_null) {
Stack *stack = initialize();
push(stack, 200);
pop(stack);
assert_that(min(stack), is_equal_to(NULL));
free(stack);
}
Ensure(MinStack, when_pushing_a_single_integer) {
Stack *stack = initialize();
push(stack, 1);
assert_that(size(stack), is_equal_to(1));
assert_that(min(stack), is_equal_to(1));
assert_that(pop(stack), is_equal_to(1));
assert_that(size(stack), is_equal_to(0));
free(stack);
}
Ensure(MinStack, when_pushing_multiple_integers_out_of_order) {
Stack *stack = initialize();
push(stack, 2);
push(stack, 3);
push(stack, 4);
push(stack, 1);
assert_that(size(stack), is_equal_to(4));
assert_that(min(stack), is_equal_to(1));
assert_that(pop(stack), is_equal_to(1));
assert_that(size(stack), is_equal_to(3));
assert_that(min(stack), is_equal_to(2));
assert_that(pop(stack), is_equal_to(4));
assert_that(size(stack), is_equal_to(2));
assert_that(min(stack), is_equal_to(2));
assert_that(pop(stack), is_equal_to(3));
assert_that(size(stack), is_equal_to(1));
assert_that(min(stack), is_equal_to(2));
assert_that(pop(stack), is_equal_to(2));
assert_that(size(stack), is_equal_to(0));
assert_that(min(stack), is_equal_to(NULL));
assert_that(pop(stack), is_equal_to(NULL));
assert_that(size(stack), is_equal_to(0));
free(stack);
}
Ensure(MinStack, when_pushing_duplicate_values_on_to_the_stack) {
Stack *stack = initialize();
push(stack, 2);
push(stack, 1);
push(stack, 2);
assert_that(size(stack), is_equal_to(3));
assert_that(min(stack), is_equal_to(1));
assert_that(pop(stack), is_equal_to(2));
assert_that(min(stack), is_equal_to(1));
assert_that(pop(stack), is_equal_to(1));
assert_that(min(stack), is_equal_to(2));
assert_that(pop(stack), is_equal_to(2));
assert_that(min(stack), is_equal_to(NULL));
assert_that(pop(stack), is_equal_to(NULL));
free(stack);
}
TestSuite *min_stack_tests() {
TestSuite *suite = create_test_suite();
add_test_with_context(suite, MinStack, when_empty_it_has_a_size_of_zero);
add_test_with_context(suite, MinStack, when_empty_it_has_a_min_of_null);
add_test_with_context(
suite, MinStack, when_a_single_item_is_on_the_stack_it_has_a_size_of_one);
add_test_with_context(suite, MinStack,
when_a_single_item_is_on_the_stack_it_is_the_min);
add_test_with_context(
suite, MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_the_item);
add_test_with_context(
suite, MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_a_size_of_zero);
add_test_with_context(
suite, MinStack,
when_a_single_item_is_on_the_stack_when_it_is_popped_off_it_returns_a_min_of_null);
add_test_with_context(suite, MinStack, when_pushing_a_single_integer);
add_test_with_context(suite, MinStack,
when_pushing_multiple_integers_out_of_order);
return suite;
}
int main(int argc, char **argv) {
TestSuite *suite = create_test_suite();
add_suite(suite, min_stack_tests());
return run_test_suite(suite, create_text_reporter());
}
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