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|
local cache = require "util.cache";
describe("util.cache", function()
describe("#new()", function()
it("should work", function()
local c = cache.new(5);
local function expect_kv(key, value, actual_key, actual_value)
assert.are.equal(key, actual_key, "key incorrect");
assert.are.equal(value, actual_value, "value incorrect");
end
expect_kv(nil, nil, c:head());
expect_kv(nil, nil, c:tail());
assert.are.equal(c:count(), 0);
c:set("one", 1)
assert.are.equal(c:count(), 1);
expect_kv("one", 1, c:head());
expect_kv("one", 1, c:tail());
c:set("two", 2)
expect_kv("two", 2, c:head());
expect_kv("one", 1, c:tail());
c:set("three", 3)
expect_kv("three", 3, c:head());
expect_kv("one", 1, c:tail());
c:set("four", 4)
c:set("five", 5);
assert.are.equal(c:count(), 5);
expect_kv("five", 5, c:head());
expect_kv("one", 1, c:tail());
c:set("foo", nil);
assert.are.equal(c:count(), 5);
expect_kv("five", 5, c:head());
expect_kv("one", 1, c:tail());
assert.are.equal(c:get("one"), 1);
expect_kv("five", 5, c:head());
expect_kv("one", 1, c:tail());
assert.are.equal(c:get("two"), 2);
assert.are.equal(c:get("three"), 3);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("foo"), nil);
assert.are.equal(c:get("bar"), nil);
c:set("six", 6);
assert.are.equal(c:count(), 5);
expect_kv("six", 6, c:head());
expect_kv("two", 2, c:tail());
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), 2);
assert.are.equal(c:get("three"), 3);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("six"), 6);
c:set("three", nil);
assert.are.equal(c:count(), 4);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), 2);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("six"), 6);
c:set("seven", 7);
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), 2);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
c:set("eight", 8);
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
c:set("four", 4);
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), 5);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
c:set("nine", 9);
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), 4);
assert.are.equal(c:get("five"), nil);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
assert.are.equal(c:get("nine"), 9);
do
local keys = { "nine", "four", "eight", "seven", "six" };
local values = { 9, 4, 8, 7, 6 };
local i = 0;
for k, v in c:items() do
i = i + 1;
assert.are.equal(k, keys[i]);
assert.are.equal(v, values[i]);
end
assert.are.equal(i, 5);
c:set("four", "2+2");
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), "2+2");
assert.are.equal(c:get("five"), nil);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
assert.are.equal(c:get("nine"), 9);
end
do
local keys = { "four", "nine", "eight", "seven", "six" };
local values = { "2+2", 9, 8, 7, 6 };
local i = 0;
for k, v in c:items() do
i = i + 1;
assert.are.equal(k, keys[i]);
assert.are.equal(v, values[i]);
end
assert.are.equal(i, 5);
c:set("foo", nil);
assert.are.equal(c:count(), 5);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), "2+2");
assert.are.equal(c:get("five"), nil);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
assert.are.equal(c:get("nine"), 9);
end
do
local keys = { "four", "nine", "eight", "seven", "six" };
local values = { "2+2", 9, 8, 7, 6 };
local i = 0;
for k, v in c:items() do
i = i + 1;
assert.are.equal(k, keys[i]);
assert.are.equal(v, values[i]);
end
assert.are.equal(i, 5);
c:set("four", nil);
assert.are.equal(c:get("one"), nil);
assert.are.equal(c:get("two"), nil);
assert.are.equal(c:get("three"), nil);
assert.are.equal(c:get("four"), nil);
assert.are.equal(c:get("five"), nil);
assert.are.equal(c:get("six"), 6);
assert.are.equal(c:get("seven"), 7);
assert.are.equal(c:get("eight"), 8);
assert.are.equal(c:get("nine"), 9);
end
do
local keys = { "nine", "eight", "seven", "six" };
local values = { 9, 8, 7, 6 };
local i = 0;
for k, v in c:items() do
i = i + 1;
assert.are.equal(k, keys[i]);
assert.are.equal(v, values[i]);
end
assert.are.equal(i, 4);
end
do
local evicted_key, evicted_value;
local c2 = cache.new(3, function (_key, _value)
evicted_key, evicted_value = _key, _value;
end);
local function set(k, v, should_evict_key, should_evict_value)
evicted_key, evicted_value = nil, nil;
c2:set(k, v);
assert.are.equal(evicted_key, should_evict_key);
assert.are.equal(evicted_value, should_evict_value);
end
set("a", 1)
set("a", 1)
set("a", 1)
set("a", 1)
set("a", 1)
set("b", 2)
set("c", 3)
set("b", 2)
set("d", 4, "a", 1)
set("e", 5, "c", 3)
end
do
local evicted_key, evicted_value;
local c3 = cache.new(1, function (_key, _value)
evicted_key, evicted_value = _key, _value;
if _key == "a" then
-- Sanity check for what we're evicting
assert.are.equal(_key, "a");
assert.are.equal(_value, 1);
-- We're going to block eviction of this key/value, so set to nil...
evicted_key, evicted_value = nil, nil;
-- Returning false to block eviction
return false
end
end);
local function set(k, v, should_evict_key, should_evict_value)
evicted_key, evicted_value = nil, nil;
local ret = c3:set(k, v);
assert.are.equal(evicted_key, should_evict_key);
assert.are.equal(evicted_value, should_evict_value);
return ret;
end
set("a", 1)
set("a", 1)
set("a", 1)
set("a", 1)
set("a", 1)
-- Our on_evict prevents "a" from being evicted, causing this to fail...
assert.are.equal(set("b", 2), false, "Failed to prevent eviction, or signal result");
expect_kv("a", 1, c3:head());
expect_kv("a", 1, c3:tail());
-- Check the final state is what we expect
assert.are.equal(c3:get("a"), 1);
assert.are.equal(c3:get("b"), nil);
assert.are.equal(c3:count(), 1);
end
local c4 = cache.new(3, false);
assert.are.equal(c4:set("a", 1), true);
assert.are.equal(c4:set("a", 1), true);
assert.are.equal(c4:set("a", 1), true);
assert.are.equal(c4:set("a", 1), true);
assert.are.equal(c4:set("b", 2), true);
assert.are.equal(c4:set("c", 3), true);
assert.are.equal(c4:set("d", 4), false);
assert.are.equal(c4:set("d", 4), false);
assert.are.equal(c4:set("d", 4), false);
expect_kv("c", 3, c4:head());
expect_kv("a", 1, c4:tail());
local c5 = cache.new(3, function (k, v)
if k == "a" then
return nil;
elseif k == "b" then
return true;
end
return false;
end);
assert.are.equal(c5:set("a", 1), true);
assert.are.equal(c5:set("a", 1), true);
assert.are.equal(c5:set("a", 1), true);
assert.are.equal(c5:set("a", 1), true);
assert.are.equal(c5:set("b", 2), true);
assert.are.equal(c5:set("c", 3), true);
assert.are.equal(c5:set("d", 4), true); -- "a" evicted (cb returned nil)
assert.are.equal(c5:set("d", 4), true); -- nop
assert.are.equal(c5:set("d", 4), true); -- nop
assert.are.equal(c5:set("e", 5), true); -- "b" evicted (cb returned true)
assert.are.equal(c5:set("f", 6), false); -- "c" won't evict (cb returned false)
expect_kv("e", 5, c5:head());
expect_kv("c", 3, c5:tail());
end);
end);
end);
|
