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describe("pl.text", function ()
local text = require("pl.text")
describe("Template", function()
local Template = text.Template
it("substitute() replaces placeholders", function()
local t1 = Template [[
while true do
$contents
end
]]
assert.equal([[
while true do
print "hello"
end
]], t1:substitute {contents = 'print "hello"'})
end)
it("substitute() replaces multiple placeholders", function ()
local template = Template("${here} is the $answer")
local out = template:substitute({ here = 'one', answer = 'two' })
assert.is.equal('one is the two', out)
end)
it("indent_substitute() indents replaced multi-lines", function()
local t1 = Template [[
while true do
$contents
end
]]
assert.equal(
"while true do\n"..
" for i = 1,10 do\n"..
" gotcha(i)\n"..
" end\n"..
"\n"..
"end\n"
, t1:indent_substitute {contents = [[
for i = 1,10 do
gotcha(i)
end
]]})
end)
end)
describe("indent()", function()
it("adds an indent", function()
local t = "a whole lot\nof love"
assert.equal([[
a whole lot
of love
]], text.indent(t, 4))
assert.equal([[
**easy
**
**enough!
]], text.indent("easy\n\nenough!", 2 ,'*'))
end)
it("appends a newline if not present", function()
assert.equal(" hello\n world\n", text.indent("hello\nworld", 2))
assert.equal(" hello\n world\n", text.indent("hello\nworld\n", 2))
end)
end)
describe("dedent()", function()
it("removes prefixed whitespace", function()
assert.equal([[
one
two
three
]], text.dedent [[
one
two
three
]])
end)
it("removes prefixed whitespace, retains structure", function()
assert.equal([[
one
two
three
]], text.dedent [[
one
two
three
]])
end)
it("appends a newline if not present", function()
assert.equal("hello\nworld\n", text.dedent(" hello\n world"))
assert.equal("hello\nworld\n", text.dedent(" hello\n world\n"))
end)
end)
describe("format_operator()", function()
setup(function()
text.format_operator()
end)
it("handles plain substitutions", function()
assert.equal('[home]', '[%s]' % 'home')
assert.equal('fred = 42', '%s = %d' % {'fred',42})
end)
it("invokes tostring on %s formats", function()
-- mostly works like string.format, except that %s forces use of tostring()
-- rather than throwing an error
local List = require 'pl.List'
assert.equal('TBL:{1,2,3}', 'TBL:%s' % List{1,2,3})
end)
it("replaces '$field' references", function()
-- table with keys and format with $
assert.equal('<1>', '<$one>' % {one=1})
end)
it("accepts replacement functions", function()
local function subst(k)
if k == 'A' then
return 'ay'
elseif k == 'B' then
return 'bee'
else
return '?'
end
end
assert.equal('ay & bee', '$A & $B' % subst)
end)
end)
describe("fill()/wrap()", function()
it("word-wraps a text", function()
assert.equal([[
It is often said of Lua
that it does not include
batteries. That is because
the goal of Lua is to
produce a lean expressive
language that will be
used on all sorts of
machines, (some of which
don't even have hierarchical
filesystems). The Lua
language is the equivalent
of an operating system
kernel; the creators
of Lua do not see it
as their responsibility
to create a full software
ecosystem around the
language. That is the
role of the community.
]], text.fill("It is often said of Lua that it does not include batteries. That is because the goal of Lua is to produce a lean expressive language that will be used on all sorts of machines, (some of which don't even have hierarchical filesystems). The Lua language is the equivalent of an operating system kernel; the creators of Lua do not see it as their responsibility to create a full software ecosystem around the language. That is the role of the community.", 20))
end)
it("wraps single letters", function()
assert.same({"a"}, text.wrap("a"))
end)
it("wraps width over limit", function()
assert.same({
"abc",
"def"
}, text.wrap("abc def", 2))
end)
it("wraps width at limit", function()
assert.same({
"abc",
"def"
}, text.wrap("abc def", 3))
end)
it("doesn't split on accented characters", function()
assert.same({"àbcdéfghîj"}, text.wrap("àbcdéfghîj"))
end)
it("generic wrap test", function()
local t = [[
hello "world" 'this' -is- a bb ccc dddd test... but wouldn't it pass??? final. word-that-can-be-broken
]]
assert.same({
"hello",
'"world"',
"'this'",
"-is-",
"a bb",
"ccc",
"dddd",
"test...",
"but",
"wouldn't",
"it pass???",
"final.",
"word-that-can-be-broken",
}, text.wrap(t, 3))
end)
end)
end)
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