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#include "../../unity/unity.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void setUp(void) {
/* Setup code here, or leave empty */
}
void tearDown(void) {
/* Cleanup code here, or leave empty */
}
/* Helper to allocate and zero a struct line */
static struct line* alloc_zeroed_line(void) {
struct line* l = (struct line*)malloc(sizeof(struct line));
TEST_ASSERT_NOT_NULL(l);
memset(l, 0, sizeof(*l));
return l;
}
void test_freeline_null_pointer_ok(void) {
/* Should not crash or modify anything when given NULL */
freeline(NULL);
/* If we got here, no crash; record a trivial assertion */
TEST_ASSERT_TRUE(1);
}
void test_freeline_frees_and_nulls_members(void) {
struct line* l = alloc_zeroed_line();
/* Simulate populated fields and buffer */
l->nfields = 3;
l->nfields_allocated = 3;
l->fields = (struct field*)malloc(sizeof(struct field) * 3);
TEST_ASSERT_NOT_NULL(l->fields);
/* Field contents don't matter to freeline; avoid extra allocations */
for (int i = 0; i < 3; i++) {
l->fields[i].beg = NULL;
l->fields[i].len = 0;
}
l->buf.buffer = (char*)malloc(16);
TEST_ASSERT_NOT_NULL(l->buf.buffer);
memset(l->buf.buffer, 'X', 16);
l->buf.length = 16;
freeline(l);
/* After freeline: pointers are NULLed; counters/length unchanged */
TEST_ASSERT_NULL(l->fields);
TEST_ASSERT_NULL(l->buf.buffer);
TEST_ASSERT_EQUAL_INT(3, (int)l->nfields);
TEST_ASSERT_EQUAL_INT(3, (int)l->nfields_allocated);
TEST_ASSERT_EQUAL_INT(16, (int)l->buf.length);
free(l);
}
void test_freeline_idempotent_on_same_line(void) {
struct line* l = alloc_zeroed_line();
l->fields = (struct field*)malloc(sizeof(struct field));
TEST_ASSERT_NOT_NULL(l->fields);
l->nfields = 1;
l->nfields_allocated = 1;
l->buf.buffer = (char*)malloc(8);
TEST_ASSERT_NOT_NULL(l->buf.buffer);
memset(l->buf.buffer, 'Y', 8);
l->buf.length = 8;
/* First call frees and NULLs pointers */
freeline(l);
TEST_ASSERT_NULL(l->fields);
TEST_ASSERT_NULL(l->buf.buffer);
/* Second call should be safe (free(NULL)) and remain NULL */
freeline(l);
TEST_ASSERT_NULL(l->fields);
TEST_ASSERT_NULL(l->buf.buffer);
free(l);
}
void test_freeline_only_fields_allocated(void) {
struct line* l = alloc_zeroed_line();
l->fields = (struct field*)malloc(sizeof(struct field) * 2);
TEST_ASSERT_NOT_NULL(l->fields);
l->nfields = 2;
l->nfields_allocated = 2;
/* Ensure buffer is NULL/non-allocated */
l->buf.buffer = NULL;
l->buf.length = 5; /* length should remain unchanged */
freeline(l);
TEST_ASSERT_NULL(l->fields);
TEST_ASSERT_NULL(l->buf.buffer);
TEST_ASSERT_EQUAL_INT(2, (int)l->nfields);
TEST_ASSERT_EQUAL_INT(2, (int)l->nfields_allocated);
TEST_ASSERT_EQUAL_INT(5, (int)l->buf.length);
free(l);
}
void test_freeline_only_buffer_allocated(void) {
struct line* l = alloc_zeroed_line();
l->fields = NULL;
l->nfields = 0;
l->nfields_allocated = 0;
l->buf.buffer = (char*)malloc(32);
TEST_ASSERT_NOT_NULL(l->buf.buffer);
memset(l->buf.buffer, 'Z', 32);
l->buf.length = 32;
freeline(l);
TEST_ASSERT_NULL(l->fields);
TEST_ASSERT_NULL(l->buf.buffer);
TEST_ASSERT_EQUAL_INT(0, (int)l->nfields);
TEST_ASSERT_EQUAL_INT(0, (int)l->nfields_allocated);
TEST_ASSERT_EQUAL_INT(32, (int)l->buf.length);
free(l);
}
int main(void) {
UNITY_BEGIN();
RUN_TEST(test_freeline_null_pointer_ok);
RUN_TEST(test_freeline_frees_and_nulls_members);
RUN_TEST(test_freeline_idempotent_on_same_line);
RUN_TEST(test_freeline_only_fields_allocated);
RUN_TEST(test_freeline_only_buffer_allocated);
return UNITY_END();
} |