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local Data = require "nvim-lsp-installer.data"
local spy = require "luassert.spy"
describe("data", function()
it("creates enums", function()
local colors = Data.enum {
"BLUE",
"YELLOW",
}
assert.equal(
vim.inspect {
["BLUE"] = "BLUE",
["YELLOW"] = "YELLOW",
},
vim.inspect(colors)
)
end)
it("creates sets", function()
local colors = Data.set_of {
"BLUE",
"YELLOW",
"BLUE",
"RED",
}
assert.equal(
vim.inspect {
["BLUE"] = true,
["YELLOW"] = true,
["RED"] = true,
},
vim.inspect(colors)
)
end)
it("reverses lists", function()
local colors = { "BLUE", "YELLOW", "RED" }
assert.equal(
vim.inspect {
"RED",
"YELLOW",
"BLUE",
},
vim.inspect(Data.list_reverse(colors))
)
-- should not modify in-place
assert.equal(vim.inspect { "BLUE", "YELLOW", "RED" }, vim.inspect(colors))
end)
it("maps over list", function()
local colors = { "BLUE", "YELLOW", "RED" }
assert.equal(
vim.inspect {
"LIGHT_BLUE1",
"LIGHT_YELLOW2",
"LIGHT_RED3",
},
vim.inspect(Data.list_map(function(color, i)
return "LIGHT_" .. color .. i
end, colors))
)
-- should not modify in-place
assert.equal(vim.inspect { "BLUE", "YELLOW", "RED" }, vim.inspect(colors))
end)
it("coalesces first non-nil value", function()
assert.equal("Hello World!", Data.coalesce(nil, nil, "Hello World!", ""))
end)
it("makes a shallow copy of a list", function()
local list = { "BLUE", { nested = "TABLE" }, "RED" }
local list_copy = Data.list_copy(list)
assert.equal(vim.inspect { "BLUE", { nested = "TABLE" }, "RED" }, vim.inspect(list_copy))
assert.is_not.is_true(list == list_copy)
assert.is_true(list[2] == list_copy[2])
end)
it("finds first item that fulfills predicate", function()
local predicate = spy.new(function(item)
return item == "Waldo"
end)
assert.equal(
"Waldo",
Data.list_find_first({
"Where",
"On Earth",
"Is",
"Waldo",
"?",
}, predicate)
)
assert.spy(predicate).was.called(4)
end)
it("determines whether any item in the list fulfills predicate", function()
local predicate = spy.new(function(item)
return item == "On Earth"
end)
assert.is_true(Data.list_any({
"Where",
"On Earth",
"Is",
"Waldo",
"?",
}, predicate))
assert.spy(predicate).was.called(2)
end)
it("memoizes functions with default cache mechanism", function()
local expensive_function = spy.new(function(s)
return s
end)
local memoized_fn = Data.memoize(expensive_function)
assert.equal("key", memoized_fn "key")
assert.equal("key", memoized_fn "key")
assert.equal("new_key", memoized_fn "new_key")
assert.spy(expensive_function).was_called(2)
end)
it("memoizes function with custom cache mechanism", function()
local expensive_function = spy.new(function(arg1, arg2)
return arg1 .. arg2
end)
local memoized_fn = Data.memoize(expensive_function, function(arg1, arg2)
return arg1 .. arg2
end)
assert.equal("key1key2", memoized_fn("key1", "key2"))
assert.equal("key1key2", memoized_fn("key1", "key2"))
assert.equal("key1key3", memoized_fn("key1", "key3"))
assert.spy(expensive_function).was_called(2)
end)
end)
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