Add new tests: t0502-table, t0503-tableit

"t0502-table" tests for basic functionality of the objects
table:
	table_create	(creating a new object table)
	table_populate	(fill & lookup on the object table)
	table_resize	(dynamically resize the table)

"t0503-tableit" tests the iterator for object tables:
	table_iterator (make sure the iterator reaches all objects)

Signed-off-by: Vicent Marti <tanoku@gmail.com>

tests/t0502-table.c

+#include "test_lib.h"
+#include "test_helpers.h"
+#include "commit.h"
+#include "revobject.h"
+#include "hash.h"
+
+
+BEGIN_TEST(table_create)
+
+	git_revpool_table *table = NULL;
+
+	table = git_revpool_table_create(55);
+	must_be_true(table != NULL);
+	must_be_true(table->size_mask + 1 == 64);
+
+	git_revpool_table_free(table);
+
+END_TEST
+
+BEGIN_TEST(table_populate)
+
+	const int objects_n = 32;
+	int i;
+	git_revpool_object *objects;
+	git_revpool_table *table = NULL;
+
+	table = git_revpool_table_create(objects_n * 2);
+	must_be_true(table != NULL);
+
+	objects = git__malloc(objects_n * sizeof(git_revpool_object));
+	memset(objects, 0x0, objects_n * sizeof(git_revpool_object));
+
+	/* populate the hash table */
+	for (i = 0; i < objects_n; ++i) {
+		git_hash_buf(&(objects[i].id), &i, sizeof(int));
+		must_pass(git_revpool_table_insert(table, &(objects[i])));
+	}
+
+	/* make sure all the inserted objects can be found */
+	for (i = 0; i < objects_n; ++i) {
+		git_oid id;
+		git_revpool_object *ob;
+
+		git_hash_buf(&id, &i, sizeof(int));
+		ob = git_revpool_table_lookup(table, &id);
+
+		must_be_true(ob != NULL);
+		must_be_true(ob == &(objects[i]));
+	}
+
+	/* make sure we cannot find inexisting objects */
+	for (i = 0; i < 50; ++i) {
+		int hash_id;
+		git_oid id;
+
+		hash_id = (rand() % 50000) + objects_n;
+		git_hash_buf(&id, &hash_id, sizeof(int));
+		must_be_true(git_revpool_table_lookup(table, &id) == NULL);
+	}
+
+	git_revpool_table_free(table);
+	free(objects);
+
+END_TEST
+
+
+BEGIN_TEST(table_resize)
+
+	const int objects_n = 64;
+	int i;
+	unsigned int old_size;
+	git_revpool_object *objects;
+	git_revpool_table *table = NULL;
+
+	table = git_revpool_table_create(objects_n);
+	must_be_true(table != NULL);
+
+	objects = git__malloc(objects_n * sizeof(git_revpool_object));
+	memset(objects, 0x0, objects_n * sizeof(git_revpool_object));
+
+	old_size = table->size_mask + 1;
+
+	/* populate the hash table -- should be automatically resized */
+	for (i = 0; i < objects_n; ++i) {
+		git_hash_buf(&(objects[i].id), &i, sizeof(int));
+		must_pass(git_revpool_table_insert(table, &(objects[i])));
+	}
+
+	must_be_true(table->size_mask > old_size);
+
+	/* make sure all the inserted objects can be found */
+	for (i = 0; i < objects_n; ++i) {
+		git_oid id;
+		git_revpool_object *ob;
+
+		git_hash_buf(&id, &i, sizeof(int));
+		ob = git_revpool_table_lookup(table, &id);
+
+		must_be_true(ob != NULL);
+		must_be_true(ob == &(objects[i]));
+	}
+
+	/* force another resize */
+	old_size = table->size_mask + 1;
+	git_revpool_table_resize(table);
+	must_be_true(table->size_mask > old_size);
+
+	/* make sure all the inserted objects can be found */
+	for (i = 0; i < objects_n; ++i) {
+		git_oid id;
+		git_revpool_object *ob;
+
+		git_hash_buf(&id, &i, sizeof(int));
+		ob = git_revpool_table_lookup(table, &id);
+
+		must_be_true(ob != NULL);
+		must_be_true(ob == &(objects[i]));
+	}
+
+	git_revpool_table_free(table);
+	free(objects);
+
+END_TEST

tests/t0503-tableit.c

+#include "test_lib.h"
+#include "test_helpers.h"
+#include "commit.h"
+#include "revobject.h"
+#include "hash.h"
+
+typedef struct _aux_object {
+	git_revpool_object object;
+	int visited;
+} aux_object;
+
+
+BEGIN_TEST(table_iterator)
+
+	const int objects_n = 32;
+	int i;
+	aux_object *objects, *ob;
+
+	git_revpool_table *table = NULL;
+	git_revpool_tableit iterator;
+
+	table = git_revpool_table_create(objects_n * 2);
+	must_be_true(table != NULL);
+
+	objects = git__malloc(objects_n * sizeof(aux_object));
+	memset(objects, 0x0, objects_n * sizeof(aux_object));
+
+	/* populate the hash table */
+	for (i = 0; i < objects_n; ++i) {
+		git_hash_buf(&(objects[i].object.id), &i, sizeof(int));
+		must_pass(git_revpool_table_insert(table, (git_revpool_object *)&(objects[i])));
+	}
+
+	git_revpool_tableit_init(table, &iterator);
+
+	/* iterate through all nodes, mark as visited */
+	while ((ob = (aux_object *)git_revpool_tableit_next(&iterator)) != NULL)
+		ob->visited = 1;
+
+	/* make sure all nodes have been visited */
+	for (i = 0; i < objects_n; ++i)
+		must_be_true(objects[i].visited);
+
+	git_revpool_table_free(table);
+	free(objects);
+
+END_TEST