[PATCH v3 3/5] t-reftable-tree: split test_tree() into two sub-test functions

[Chandra Pratap <chandrapratap3519@gmail.com>]

In the current testing setup, tests for both tree_search() and
infix_walk() defined by reftable/tree.{c, h} are performed by
a single test function, test_tree(). Split tree_test() into
test_tree_search() and test_infix_walk() responsible for
independently testing tree_search() and infix_walk() respectively.
This improves the overall readability of the test file as well as
simplifies debugging.

Note that the last parameter in the tree_search() functiom is
'int insert' which when set, inserts the key if it is not found
in the tree. Otherwise, the function returns NULL for such cases.

Mentored-by: Patrick Steinhardt <ps@pks.im>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Chandra Pratap <chandrapratap3519@gmail.com>
---
 t/unit-tests/t-reftable-tree.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/t/unit-tests/t-reftable-tree.c b/t/unit-tests/t-reftable-tree.c
index 208e7b7874..cb721b377a 100644
--- a/t/unit-tests/t-reftable-tree.c
+++ b/t/unit-tests/t-reftable-tree.c
@@ -26,13 +26,12 @@ static void check_increasing(void *arg, void *key)
 	c->last = key;
 }
 
-static void test_tree(void)
+static void test_tree_search(void)
 {
 	struct tree_node *root = NULL;
 	void *values[11] = { 0 };
 	struct tree_node *nodes[11] = { 0 };
 	size_t i = 1;
-	struct curry c = { 0 };
 
 	do {
 		nodes[i] = tree_search(values + i, &root, &test_compare, 1);
@@ -44,13 +43,29 @@ static void test_tree(void)
 		check_pointer_eq(nodes[i], tree_search(values + i, &root, &test_compare, 0));
 	}
 
-	infix_walk(root, check_increasing, &c);
+	tree_free(root);
+}
+
+static void test_infix_walk(void)
+{
+	struct tree_node *root = NULL;
+	void *values[11] = { 0 };
+	struct curry c = { 0 };
+	size_t i = 1;
+
+	do {
+		tree_search(values + i, &root, &test_compare, 1);
+		i = (i * 7) % 11;
+	} while (i != 1);
+
+	infix_walk(root, &check_increasing, &c);
 	tree_free(root);
 }
 
 int cmd_main(int argc, const char *argv[])
 {
-	TEST(test_tree(), "tree_search and infix_walk work");
+	TEST(test_tree_search(), "tree_search works");
+	TEST(test_infix_walk(), "infix_walk works");
 
 	return test_done();
 }
-- 
2.45.2.404.g9eaef5822c