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🧪 test: Add test for HashMap resize logic #69

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🧪 test: Add test for HashMap resize logic #69

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36 changes: 36 additions & 0 deletions echo-core-zig/src/data/hashmap.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -294,3 +294,39 @@ test "HashMap multiple resizes and collisions" {
// 1000 / 0.75 = 1333.33 -> next power of 2 is 2048
try std.testing.expect(map.entries.len >= 2048);
}

test "HashMap simple resize logic retains items" {
var map = try HashMap([]const u8, i32).init(std.testing.allocator, 8);
defer map.deinit();

// Capacity is 8, so threshold is 8 * 3 / 4 = 6
// We insert 10 items, which will trigger at least one resize
try map.put("item1", 1);
try map.put("item2", 2);
try map.put("item3", 3);
try map.put("item4", 4);
try map.put("item5", 5);
try map.put("item6", 6);
try map.put("item7", 7); // triggers resize
try map.put("item8", 8);
try map.put("item9", 9);
try map.put("item10", 10);

// Verify all items still exist and are correct
try std.testing.expectEqual(@as(i32, 1), map.get("item1").?.*);
try std.testing.expectEqual(@as(i32, 2), map.get("item2").?.*);
try std.testing.expectEqual(@as(i32, 3), map.get("item3").?.*);
try std.testing.expectEqual(@as(i32, 4), map.get("item4").?.*);
try std.testing.expectEqual(@as(i32, 5), map.get("item5").?.*);
try std.testing.expectEqual(@as(i32, 6), map.get("item6").?.*);
try std.testing.expectEqual(@as(i32, 7), map.get("item7").?.*);
try std.testing.expectEqual(@as(i32, 8), map.get("item8").?.*);
try std.testing.expectEqual(@as(i32, 9), map.get("item9").?.*);
try std.testing.expectEqual(@as(i32, 10), map.get("item10").?.*);

// Verify the count is correct
try std.testing.expectEqual(@as(usize, 10), map.count);

// Verify it actually resized
try std.testing.expect(map.entries.len > 8);
}