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local _ = require "mason-core.functional"
describe("functional: relation", function()
it("should check equality", function()
local tbl = {}
local is_tbl = _.equals(tbl)
local is_a = _.equals "a"
local is_42 = _.equals(42)
assert.is_true(is_tbl(tbl))
assert.is_true(is_a "a")
assert.is_true(is_42(42))
assert.is_false(is_a "b")
assert.is_false(is_42(32))
end)
it("should check property equality", function()
local fn_key = function() end
local tbl = { a = "a", b = "b", number = 42, [fn_key] = "fun" }
assert.is_true(_.prop_eq("a", "a", tbl))
assert.is_true(_.prop_eq(fn_key, "fun", tbl))
assert.is_true(_.prop_eq(fn_key) "fun"(tbl))
end)
it("should check whether property satisfies predicate", function()
local obj = {
low = 0,
med = 10,
high = 15,
}
assert.is_false(_.prop_satisfies(_.gt(10), "low", obj))
assert.is_false(_.prop_satisfies(_.gt(10), "med")(obj))
assert.is_true(_.prop_satisfies(_.gt(10)) "high"(obj))
end)
it("should check whether nested property satisfies predicate", function()
local obj = {
low = { value = 0 },
med = { value = 10 },
high = { value = 15 },
}
assert.is_false(_.path_satisfies(_.gt(10), { "low", "value" }, obj))
assert.is_false(_.path_satisfies(_.gt(10), { "med", "value" })(obj))
assert.is_true(_.path_satisfies(_.gt(10)) { "high", "value" }(obj))
end)
it("should subtract numbers", function()
assert.equals(42, _.min(42, 84))
assert.equals(-1, _.min(11, 10))
end)
it("should add numbers", function()
assert.equals(1337, _.add(1300, 37))
assert.equals(-10, _.add(90, -100))
end)
end)
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