tests: added test for Curl_splaygetbest to unit1309

This checks the new behavior of Curl_splaygetbest, so that the smallest
node not larger than the key is removed, and FIFO behavior is kept even
when there are multiple nodes with the same key.

Closes #1358

tests/data/test1309

@@ -1451,6 +1451,117 @@ remove pointer 5, payload 659
 Tree look:
 0.177[0]
 remove pointer 6, payload 177
+Removing nodes not larger than 0
+removed payload 0[0]
+Removing nodes not larger than 100
+removed payload 39[0]
+removed payload 49[0]
+removed payload 49[1]
+removed payload 59[0]
+removed payload 59[1]
+removed payload 59[2]
+removed payload 98[0]
+removed payload 98[1]
+removed payload 98[2]
+Removing nodes not larger than 200
+removed payload 108[0]
+removed payload 118[0]
+removed payload 118[1]
+removed payload 157[0]
+removed payload 157[1]
+removed payload 167[0]
+removed payload 167[1]
+removed payload 167[2]
+removed payload 177[0]
+Removing nodes not larger than 300
+removed payload 216[0]
+removed payload 226[0]
+removed payload 226[1]
+removed payload 236[0]
+removed payload 236[1]
+removed payload 236[2]
+removed payload 275[0]
+removed payload 275[1]
+removed payload 275[2]
+removed payload 285[0]
+removed payload 295[0]
+removed payload 295[1]
+Removing nodes not larger than 400
+removed payload 334[0]
+removed payload 334[1]
+removed payload 344[0]
+removed payload 344[1]
+removed payload 344[2]
+removed payload 354[0]
+removed payload 393[0]
+Removing nodes not larger than 500
+removed payload 403[0]
+removed payload 403[1]
+removed payload 413[0]
+removed payload 413[1]
+removed payload 413[2]
+removed payload 462[0]
+removed payload 472[0]
+removed payload 472[1]
+Removing nodes not larger than 600
+removed payload 521[0]
+removed payload 521[1]
+removed payload 521[2]
+removed payload 531[0]
+removed payload 541[0]
+removed payload 541[1]
+removed payload 580[0]
+removed payload 580[1]
+removed payload 590[0]
+removed payload 590[1]
+removed payload 590[2]
+removed payload 600[0]
+Removing nodes not larger than 700
+removed payload 639[0]
+removed payload 649[0]
+removed payload 649[1]
+removed payload 659[0]
+removed payload 659[1]
+removed payload 659[2]
+removed payload 698[0]
+removed payload 698[1]
+removed payload 698[2]
+Removing nodes not larger than 800
+removed payload 708[0]
+removed payload 718[0]
+removed payload 718[1]
+removed payload 757[0]
+removed payload 757[1]
+removed payload 767[0]
+removed payload 767[1]
+removed payload 767[2]
+removed payload 777[0]
+Removing nodes not larger than 900
+removed payload 816[0]
+removed payload 826[0]
+removed payload 826[1]
+removed payload 836[0]
+removed payload 836[1]
+removed payload 836[2]
+removed payload 875[0]
+removed payload 875[1]
+removed payload 875[2]
+removed payload 885[0]
+removed payload 895[0]
+removed payload 895[1]
+Removing nodes not larger than 1000
+removed payload 934[0]
+removed payload 934[1]
+removed payload 944[0]
+removed payload 944[1]
+removed payload 944[2]
+removed payload 954[0]
+Removing nodes not larger than 1100
+removed payload 1003[0]
+removed payload 1003[1]
+removed payload 1013[0]
+removed payload 1013[1]
+removed payload 1013[2]
 </stdout>
 </verify>
 

tests/unit/unit1309.c

@@ -70,12 +70,14 @@ UNITTEST_START
 /* number of nodes to add to the splay tree */
 #define NUM_NODES 50
 
-  struct Curl_tree *root;
+  struct Curl_tree *root, *removed;
-  struct Curl_tree nodes[NUM_NODES];
+  struct Curl_tree nodes[NUM_NODES*3];
   int rc;
-  int i;
+  int i, j;
+  struct timeval tv_now = {0, 0};
   root = NULL;              /* the empty tree */
 
+  /* add nodes */
   for(i = 0; i < NUM_NODES; i++) {
     struct timeval key;
 
@@ -103,6 +105,36 @@ UNITTEST_START
     }
   }
 
+  fail_unless(root == NULL, "tree not empty after removing all nodes");
+
+  /* rebuild tree */
+  for(i = 0; i < NUM_NODES; i++) {
+    struct timeval key;
+
+    key.tv_sec = 0;
+    key.tv_usec = (541*i)%1023;
+
+    /* add some nodes with the same key */
+    for(j = 0; j <= i % 3; j++) {
+      nodes[i*3+j].payload = (void *)(key.tv_usec*10 + j); /* for simplicity */
+      root = Curl_splayinsert(key, root, &nodes[i*3+j]);
+    }
+  }
+
+  removed = NULL;
+  for(i = 0; i <= 1100; i+= 100) {
+    printf("Removing nodes not larger than %d\n", i);
+    tv_now.tv_usec = i;
+    root = Curl_splaygetbest(tv_now, root, &removed);
+    while(removed != NULL) {
+      printf("removed payload %ld[%ld]\n", (long)(removed->payload) / 10,
+             (long)(removed->payload) % 10);
+      root = Curl_splaygetbest(tv_now, root, &removed);
+    }
+  }
+
+  fail_unless(root == NULL, "tree not empty when it should be");
+
 UNITTEST_STOP