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local array = require "util.array";
describe("util.array", function ()
describe("creation", function ()
describe("from table", function ()
it("works", function ()
local a = array({"a", "b", "c"});
assert.same({"a", "b", "c"}, a);
end);
end);
describe("from iterator", function ()
it("works", function ()
-- collects the first value, ie the keys
local a = array(ipairs({true, true, true}));
assert.same({1, 2, 3}, a);
end);
end);
describe("collect", function ()
it("works", function ()
-- collects the first value, ie the keys
local a = array.collect(ipairs({true, true, true}));
assert.same({1, 2, 3}, a);
end);
end);
end);
describe("metatable", function ()
describe("operator", function ()
describe("addition", function ()
it("works", function ()
local a = array({ "a", "b" });
local b = array({ "c", "d" });
assert.same({"a", "b", "c", "d"}, a + b);
end);
end);
describe("equality", function ()
it("works", function ()
local a1 = array({ "a", "b" });
local a2 = array({ "a", "b" });
local b = array({ "c", "d" });
assert.truthy(a1 == a2);
assert.falsy(a1 == b);
assert.falsy(a1 == { "a", "b" }, "Behavior of metatables changed in Lua 5.3");
end);
end);
describe("division", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
local b = a / function (i) if i ~= "b" then return i .. "x" end end;
assert.same({ "ax", "cx" }, b);
end);
end);
end);
end);
describe("methods", function ()
describe("map", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
local b = a:map(string.upper);
assert.same({ "A", "B", "C" }, b);
end);
end);
describe("filter", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
a:filter(function (i) return i ~= "b" end);
assert.same({ "a", "c" }, a);
end);
end);
describe("sort", function ()
it("works", function ()
local a = array({ 5, 4, 3, 1, 2, });
a:sort();
assert.same({ 1, 2, 3, 4, 5, }, a);
end);
end);
describe("unique", function ()
it("works", function ()
local a = array({ "a", "b", "c", "c", "a", "b" });
a:unique();
assert.same({ "a", "b", "c" }, a);
end);
end);
describe("pluck", function ()
it("works", function ()
local a = array({ { a = 1, b = -1 }, { a = 2, b = -2 }, });
a:pluck("a");
assert.same({ 1, 2 }, a);
end);
end);
describe("reverse", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
a:reverse();
assert.same({ "c", "b", "a" }, a);
end);
end);
-- TODO :shuffle
describe("append", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
a:append(array({ "d", "e", }));
assert.same({ "a", "b", "c", "d", "e" }, a);
end);
end);
describe("push", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
a:push("d"):push("e");
assert.same({ "a", "b", "c", "d", "e" }, a);
end);
end);
describe("pop", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
assert.equal("c", a:pop());
assert.same({ "a", "b", }, a);
end);
end);
describe("concat", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
assert.equal("a,b,c", a:concat(","));
end);
end);
describe("length", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
assert.equal(3, a:length());
end);
end);
describe("slice", function ()
it("works", function ()
local a = array({ "a", "b", "c" });
assert.equal(array.slice(a, 1, 2), array{ "a", "b" });
assert.equal(array.slice(a, 1, 3), array{ "a", "b", "c" });
assert.equal(array.slice(a, 2, 3), array{ "b", "c" });
assert.equal(array.slice(a, 2), array{ "b", "c" });
assert.equal(array.slice(a, -4), array{ "a", "b", "c" });
assert.equal(array.slice(a, -3), array{ "a", "b", "c" });
assert.equal(array.slice(a, -2), array{ "b", "c" });
assert.equal(array.slice(a, -1), array{ "c" });
end);
it("can mutate", function ()
local a = array({ "a", "b", "c" });
assert.equal(a:slice(-1), array{"c"});
assert.equal(a, array{"c"});
end);
end);
end);
-- TODO The various array.foo(array ina, array outa) functions
end);
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