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# General Lua Libraries for Lua 5.1, 5.2 & 5.3
# Copyright (C) 2011-2018 stdlib authors
before: |
base_module = 'package'
this_module = 'std.package'
global_table = '_G'
extend_base = {'find', 'insert', 'mappath', 'normalize', 'remove'}
M = require(this_module)
path = M.normalize('begin', 'middle', 'end')
function catfile(...)
return table.concat({...}, M.dirsep)
end
function catpath(...)
return table.concat({...}, M.pathsep)
end
specify std.package:
- context when required:
- context by name:
- it does not touch the global table:
expect(show_apis {added_to=global_table, by=this_module}).
to_equal {}
- it does not touch the core package table:
expect(show_apis {added_to=base_module, by=this_module}).
to_equal {}
- it contains apis from the core package table:
expect(show_apis {from=base_module, not_in=this_module}).
to_contain.a_permutation_of(extend_base)
- context via the std module:
- it does not touch the global table:
expect(show_apis {added_to=global_table, by='std'}).
to_equal {}
- it does not touch the core package table:
expect(show_apis {added_to=base_module, by='std'}).
to_equal {}
- describe find:
- before: |
path = table.concat({'begin', 'm%ddl.', 'end'}, M.pathsep)
f = M.find
- context with bad arguments:
badargs.diagnose(f, 'std.package.find(string, string, ?int, ?boolean|:plain)')
- it returns nil for unmatched element:
expect(f(path, 'unmatchable')).to_be(nil)
- it returns the element index for a matched element:
expect(f(path, 'end')).to_be(3)
- it returns the element text for a matched element:
i, element = f(path, 'e.*n')
expect({i, element}).to_equal {1, 'begin'}
- it accepts a search start element argument:
i, element = f(path, 'e.*n', 2)
expect({i, element}).to_equal {3, 'end'}
- it works with plain text search strings:
expect(f(path, 'm%ddl.')).to_be(nil)
i, element = f(path, '%ddl.', 1, ':plain')
expect({i, element}).to_equal {2, 'm%ddl.'}
- describe insert:
- before:
f = M.insert
- context with bad arguments:
badargs.diagnose(f, 'std.package.insert(string, [int], string)')
- it appends by default:
expect(f(path, 'new')).
to_be(M.normalize('begin', 'middle', 'end', 'new'))
- it prepends with pos set to 1:
expect(f(path, 1, 'new')).
to_be(M.normalize('new', 'begin', 'middle', 'end'))
- it can insert in the middle too:
expect(f(path, 2, 'new')).
to_be(M.normalize('begin', 'new', 'middle', 'end'))
expect(f(path, 3, 'new')).
to_be(M.normalize('begin', 'middle', 'new', 'end'))
- it normalizes the returned path:
path = table.concat({'begin', 'middle', 'end'}, M.pathsep)
expect(f(path, 'new')).
to_be(M.normalize('begin', 'middle', 'end', 'new'))
expect(f(path, 1, './x/../end')).
to_be(M.normalize('end', 'begin', 'middle'))
- describe mappath:
- before: |
expected = require 'std.string'.split(path, M.pathsep)
f = M.mappath
- context with bad arguments:
badargs.diagnose(f, 'std.package.mappath(string, function, ?any*)')
- it calls a function with each path element:
t = {}
f(path, function(e)
t[#t + 1] = e
end)
expect(t).to_equal(expected)
- it passes additional arguments through: |
reversed = {}
for i = #expected, 1, -1 do
table.insert(reversed, expected[i])
end
t = {}
f(path, function(e, pos)
table.insert(t, pos, e)
end, 1)
expect(t).to_equal(reversed)
- describe normalize:
- before:
f = M.normalize
- context with bad arguments:
badargs.diagnose(f, 'std.package.normalize(string*)')
- context with a single element:
- it strips redundant . directories:
expect(f './x/./y/.').to_be(catfile('.', 'x', 'y'))
- it strips redundant .. directories:
expect(f '../x/../y/z/..').to_be(catfile('..', 'y'))
expect(f '../x/../y/z/..').to_be(catfile('..', 'y'))
expect(f '../../x/../y/z/..').to_be(catfile('..', '..', 'y'))
expect(f '../../x/../y/./..').to_be(catfile('..', '..'))
expect(f '../../w/x/../../y/z/..').to_be(catfile('..', '..', 'y'))
expect(f '../../w/./../.././z/..').to_be(catfile('..', '..', '..'))
- it leaves leading .. directories unmolested:
expect(f '../../1').to_be(catfile('..', '..', '1'))
expect(f './../../1').to_be(catfile('..', '..', '1'))
- it normalizes / to platform dirsep:
expect(f '/foo/bar').to_be(catfile('', 'foo', 'bar'))
- it normalizes ? to platform pathmark:
expect(f '?.lua').
to_be(catfile('.', M.pathmark .. '.lua'))
- it strips redundant trailing /:
expect(f '/foo/bar/').to_be(catfile('', 'foo', 'bar'))
- it inserts missing ./ for relative paths:
for _, path in ipairs {'x', './x'} do
expect(f(path)).to_be(catfile('.', 'x'))
end
- context with multiple elements:
- it strips redundant . directories:
expect(f('./x/./y/.', 'x')).
to_be(catpath(catfile('.', 'x', 'y'), catfile('.', 'x')))
- it strips redundant .. directories:
expect(f('../x/../y/z/..', 'x')).
to_be(catpath(catfile('..', 'y'), catfile('.', 'x')))
- it normalizes / to platform dirsep:
expect(f('/foo/bar', 'x')).
to_be(catpath(catfile('', 'foo', 'bar'), catfile('.', 'x')))
- it normalizes ? to platform pathmark:
expect(f('?.lua', 'x')).
to_be(catpath(catfile('.', M.pathmark .. '.lua'), catfile('.', 'x')))
- it strips redundant trailing /:
expect(f('/foo/bar/', 'x')).
to_be(catpath(catfile('', 'foo', 'bar'), catfile('.', 'x')))
- it inserts missing ./ for relative paths:
for _, path in ipairs {'x', './x'} do
expect(f(path, 'a')).
to_be(catpath(catfile('.', 'x'), catfile('.', 'a')))
end
- it eliminates all but the first equivalent elements:
expect(f(catpath('1', 'x', '2', './x', './2', './x/../x'))).
to_be(catpath('./1', './x', './2'))
- describe remove:
- before:
f = M.remove
- context with bad arguments:
badargs.diagnose(f, 'std.package.remove(string, ?int)')
- it removes the last item by default:
expect(f(path)).to_be(M.normalize('begin', 'middle'))
- it pops the first item with pos set to 1:
expect(f(path, 1)).to_be(M.normalize('middle', 'end'))
- it can remove from the middle too:
expect(f(path, 2)).to_be(M.normalize('begin', 'end'))
- it does not normalize the returned path:
path = table.concat({'begin', 'middle', 'end'}, M.pathsep)
expect(f(path)).
to_be(table.concat({'begin', 'middle'}, M.pathsep))
- it splits package.config up:
expect(string.format('%s\n%s\n%s\n%s\n%s\n',
M.dirsep, M.pathsep, M.pathmark, M.execdir, M.igmark)
).to_contain(package.config)
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