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#include <cgreen/cgreen.h>
#include "min_stack.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_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, 1);
assert_that(size(stack), is_equal_to(3));
assert_that(min(stack), is_equal_to(1));
assert_that(pop(stack), is_equal_to(1));
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(3));
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);
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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