nextfile/spec/prevfile_spec.lua

109 lines
2.7 KiB
Lua

function get_directory_iterator_from_table(table)
return function(directory)
local index = 0
local filenames = table
return function()
index = index + 1
return filenames[index]
end
end
end
describe("ls", function()
local lfs = require "lfs"
local prevfile = require "prevfile"
insulate("if directory does not exist", function()
lfs.dir = function(directory) error("No such file or directory") end
it("should return nil", function()
local files = prevfile.ls("/testdir")
assert.equals(nil, files)
end)
end)
insulate("if directory is empty", function()
lfs.dir = get_directory_iterator_from_table({})
it("should return empty table", function()
local files = prevfile.ls("/testdir")
assert.are.same({}, files)
end)
it("should call lfs.dir with target directory", function()
spy.on(lfs, "dir")
local test_directory = "/testdir"
prevfile.ls(test_directory)
assert.spy(lfs.dir).was_called_with(test_directory)
end)
end)
insulate("if directory contains files", function()
lfs.dir = get_directory_iterator_from_table({"a.txt", "b.txt", "z.txt", "c.txt"})
it("should return the files in lexographical order", function()
local files = prevfile.ls("/testdir")
assert.are.same({"a.txt", "b.txt", "c.txt", "z.txt"}, files)
end)
end)
insulate("if directory contains numerically-named files", function()
lfs.dir = get_directory_iterator_from_table({"/testdir/709.txt", "/testdir/71.txt", "/testdir/710.txt"})
it("should return the files in numerical order", function()
local files = prevfile.ls("/testdir")
assert.are.same({"/testdir/71.txt", "/testdir/709.txt", "/testdir/710.txt"}, files)
end)
end)
insulate("if directory contains hidden files", function()
lfs.dir = get_directory_iterator_from_table({"a.txt", ".b.txt.swp", "c.txt"})
it("should exclude them from the listing", function()
local files = prevfile.ls("/testdir")
assert.are.same({"a.txt", "c.txt"}, files)
end)
end)
end)
describe("prevfile", function()
local prevfile = require "prevfile"
insulate("if ls returns nil", function()
prevfile.ls = function() return nil end
it("should return nil", function()
local file = prevfile.prevfile()
assert.are.same(nil, file)
end)
end)
insulate("if ls returns files", function()
prevfile.ls = function() return {"a.txt", "b.txt", "c.txt", "z.txt"} end
it("should call prevfile.ls to get files", function()
spy.on(prevfile, "ls")
test_directory = "/testdir"
prevfile.prevfile(test_directory)
assert.spy(prevfile.ls).was_called_with(test_directory)
end)
it("should return the last file in the list", function()
local file = prevfile.prevfile("/testdir")
assert.are.same("z.txt", file)
end)
end)
end)