Fix tests

Author: lalinsky

src/index_tests.zig

@@ -10,10 +10,10 @@ const Deadline = @import("utils/Deadline.zig");
 const Index = @import("Index.zig");
 
 fn generateRandomHashes(buf: []u32, seed: u64) []u32 {
-    var prng = std.rand.DefaultPrng.init(seed);
+    var prng = std.Random.DefaultPrng.init(seed);
     const rand = prng.random();
     for (buf) |*h| {
-        h.* = std.rand.int(rand, u32);
+        h.* = rand.int(u32);
     }
     return buf;
 }

src/segment.zig

@@ -99,7 +99,7 @@ test "Item array sort" {
     items[1] = Item{ .hash = 2, .id = 100 };
     items[2] = Item{ .hash = 1, .id = 300 };
 
-    std.sort.insertion(Item, items, {}, Item.cmp);
+    std.sort.insertion(Item, items, {}, Item.lessThan);
 
     try std.testing.expectEqualSlices(Item, &[_]Item{
         Item{ .hash = 1, .id = 300 },

src/segment_merge_policy.zig

@@ -223,7 +223,7 @@ test "TieredMergePolicy" {
 
     var last_id: u64 = 1;
 
-    var prng = std.rand.DefaultPrng.init(blk: {
+    var prng = std.Random.DefaultPrng.init(blk: {
         var seed: u64 = undefined;
         try std.posix.getrandom(std.mem.asBytes(&seed));
         //seed = 16044660244849477186;