Contents

--[[-
Note that because ipairs and the length operator work correctly only for sequences
in Lua, no arrays with nils are included in these tests. This means that the provided
example is not included here:

  input: [1,[2,3,null,4],[null],5]
  output: [1,2,3,4,5]

See https://www.lua.org/manual/5.3/manual.html#3.4.7 for more information.
]]

local flatten = require 'flatten-array'

describe('flatten-array', function()
  it('should flatten arrays with a single level of nesting', function()
    assert.are.same(
      { 1, 2, 3, 4, 5, 6, 7, 8 },
      flatten({ 1, { 2, 3, 4, 5, 6, 7 }, 8 })
    )
  end)

  it('should flatten deeply nested arrays', function()
    assert.are.same(
      { 0, 2, 2, 3, 8, 100, 4, 50, -2 },
      flatten({ 0, 2, { { 2, 3 }, 8, 100, 4, { { { 50 } } } }, -2 })
    )

    assert.are.same(
      { 1,2,3,4,5,6,7,8 },
      flatten({ 1, { 2, { { 3 } }, { 4, { { 5 } } }, 6, 7 }, 8 })
    )
  end)

  it('should flatten arrays containing empty arrays', function()
    assert.are.same(
      { 0, 2, 2, 3, 8, 100, -2 },
      flatten({ 0, 2, { { 2, 3 }, 8, { { 100 } }, { {} } }, -2 })
    )
  end)

  it('should flatten arrays with no elements to an empty array', function()
    assert.are.same(
      {},
      flatten({ { { {  } } }, { { } } })
    )
  end)
end)

Version data entries

330 entries across 330 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.179	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.178	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.177	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.176	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.175	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.174	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.173	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.172	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.171	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.170	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.169	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.167	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.166	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.165	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.164	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.163	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.162	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.161	tracks/lua/exercises/flatten-array/flatten-array_spec.lua
trackler-2.2.1.160	tracks/lua/exercises/flatten-array/flatten-array_spec.lua