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|
Code.require_file("test_helper.exs", __DIR__)
require EEx
defmodule EExTest.Compiled do
def before_compile do
{__ENV__.line, hd(tl(get_stacktrace()))}
end
EEx.function_from_string(:def, :string_sample, "<%= a + b %>", [:a, :b])
filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
EEx.function_from_file(:defp, :private_file_sample, filename, [:bar])
filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
EEx.function_from_file(:def, :public_file_sample, filename, [:bar])
def file_sample(arg), do: private_file_sample(arg)
def after_compile do
{__ENV__.line, hd(tl(get_stacktrace()))}
end
@file "unknown"
def unknown do
{__ENV__.line, hd(tl(get_stacktrace()))}
end
defp get_stacktrace do
try do
:erlang.error("failed")
rescue
_ -> __STACKTRACE__
end
end
end
defmodule Clause do
defmacro defclause(expr, block) do
quote do
def unquote(expr), unquote(block)
end
end
end
defmodule EExTest do
use ExUnit.Case, async: true
doctest EEx
doctest EEx.Engine
doctest EEx.SmartEngine
describe "evaluates" do
test "simple string" do
assert_eval("foo bar", "foo bar")
end
test "Unicode" do
template = """
• <%= "•" %> •
<%= "Jößé Vâlìm" %> Jößé Vâlìm
"""
assert_eval(" • • •\n Jößé Vâlìm Jößé Vâlìm\n", template)
end
test "no spaces" do
string = """
<%=cond do%>
<%false ->%>
this
<%true ->%>
that
<%end%>
"""
expected = "\n that\n\n"
assert_eval(expected, string, [])
end
test "trim mode" do
string = "<%= 123 %> \n \n <%= 789 %>"
expected = "123\n789"
assert_eval(expected, string, [], trim: true)
string = "<%= 123 %> \n456\n <%= 789 %>"
expected = "123\n456\n789"
assert_eval(expected, string, [], trim: true)
string = "<%= 123 %> \n\n456\n\n <%= 789 %>"
expected = "123\n456\n789"
assert_eval(expected, string, [], trim: true)
string = "<%= 123 %> \n \n456\n \n <%= 789 %>"
expected = "123\n456\n789"
assert_eval(expected, string, [], trim: true)
string = "\n <%= 123 %> \n <%= 456 %> \n <%= 789 %> \n"
expected = "123\n456\n789"
assert_eval(expected, string, [], trim: true)
string = "\r\n <%= 123 %> \r\n <%= 456 %> \r\n <%= 789 %> \r\n"
expected = "123\n456\n789"
assert_eval(expected, string, [], trim: true)
end
test "trim mode with middle expression" do
string = """
<%= cond do %>
<% false -> %>
this
<% true -> %>
that
<% end %>
"""
expected = "\n that\n"
assert_eval(expected, string, [], trim: true)
end
test "trim mode with multiple lines" do
string = """
<%= "First line" %>
<%= "Second line" %>
<%= "Third line" %>
<%= "Fourth line" %>
"""
expected = "First line\nSecond line\nThird line\nFourth line"
assert_eval(expected, string, [], trim: true)
end
test "trim mode with no spaces" do
string = """
<%=if true do%>
this
<%else%>
that
<%end%>
"""
expected = "\n this\n"
assert_eval(expected, string, [], trim: true)
string = """
<%=cond do%>
<%false ->%>
this
<%true ->%>
that
<%end%>
"""
expected = "\n that\n"
assert_eval(expected, string, [], trim: true)
end
test "embedded code" do
assert_eval("foo bar", "foo <%= :bar %>")
end
test "embedded code with binding" do
assert EEx.eval_string("foo <%= bar %>", bar: 1) == "foo 1"
end
test "embedded code with do end when true" do
assert_eval("foo bar", "foo <%= if true do %>bar<% end %>")
end
test "embedded code with do end when false" do
assert_eval("foo ", "foo <%= if false do %>bar<% end %>")
end
test "embedded code with do preceded by bracket" do
assert_eval("foo bar", "foo <%= if {true}do %>bar<% end %>")
assert_eval("foo bar", "foo <%= if (true)do %>bar<% end %>")
assert_eval("foo bar", "foo <%= if [true]do %>bar<% end %>")
end
test "embedded code with do end and expression" do
assert_eval("foo bar", "foo <%= if true do %><%= :bar %><% end %>")
end
test "embedded code with do end and multiple expressions" do
assert_eval(
"foo bar baz",
"foo <%= if true do %>bar <% Process.put(:eex_text, 1) %><%= :baz %><% end %>"
)
assert Process.get(:eex_text) == 1
end
test "embedded code with middle expression" do
assert_eval("foo bar", "foo <%= if true do %>bar<% else %>baz<% end %>")
end
test "embedded code with evaluated middle expression" do
assert_eval("foo baz", "foo <%= if false do %>bar<% else %>baz<% end %>")
end
test "embedded code with comments in do end" do
assert_eval("foo bar", "foo <%= case true do %><%# comment %><% true -> %>bar<% end %>")
assert_eval(
"foo\n\nbar\n",
"foo\n<%= case true do %>\n<%# comment %>\n<% true -> %>\nbar\n<% end %>"
)
end
test "embedded code with multi-line comments in do end" do
assert_eval("foo bar", "foo <%= case true do %><%!-- comment --%><% true -> %>bar<% end %>")
assert_eval(
"foo\n\nbar\n",
"foo\n<%= case true do %>\n<%!-- comment --%>\n<% true -> %>\nbar\n<% end %>"
)
end
test "embedded code with nested do end" do
assert_eval("foo bar", "foo <%= if true do %><%= if true do %>bar<% end %><% end %>")
end
test "embedded code with nested do end with middle expression" do
assert_eval(
"foo baz",
"foo <%= if true do %><%= if false do %>bar<% else %>baz<% end %><% end %>"
)
end
test "embedded code with end followed by bracket" do
assert_eval(
" 101 102 103 ",
"<%= Enum.map([1, 2, 3], fn x -> %> <%= 100 + x %> <% end) %>"
)
assert_eval(
" 101 102 103 ",
"<%= Enum.map([1, 2, 3], fn x ->\n%> <%= 100 + x %> <% end) %>"
)
assert_eval(
" 101 102 103 ",
"<%= apply Enum, :map, [[1, 2, 3], fn x -> %> <%= 100 + x %> <% end] %>"
)
assert_eval(
" 101 102 103 ",
"<%= #{__MODULE__}.tuple_map {[1, 2, 3], fn x -> %> <%= 100 + x %> <% end} %>"
)
assert_eval(
" 101 102 103 ",
"<%= apply(Enum, :map, [[1, 2, 3], fn x -> %> <%= 100 + x %> <% end]) %>"
)
assert_eval(
" 101 102 103 ",
"<%= Enum.map([1, 2, 3], (fn x -> %> <%= 100 + x %> <% end) ) %>"
)
end
test "embedded code with variable definition" do
assert_eval("foo 1", "foo <% bar = 1 %><%= bar %>")
end
test "embedded code with require" do
assert_eval("foo 1,2,3", "foo <% require Enum, as: E %><%= E.join [1, 2, 3], \",\" %>")
end
test "with end of token" do
assert_eval("foo bar %>", "foo bar %>")
end
end
describe "raises syntax errors" do
test "when the token is invalid" do
assert_raise EEx.SyntaxError, "nofile:1:12: missing token '%>'", fn ->
EEx.compile_string("foo <%= bar")
end
end
test "when middle expression is found without a start expression" do
assert_raise EEx.SyntaxError,
"nofile:1:18: unexpected middle of expression <% else %>",
fn ->
EEx.compile_string("<%= if true %>foo<% else %>bar<% end %>")
end
end
test "when end expression is found without a start expression" do
assert_raise EEx.SyntaxError, "nofile:1:5: unexpected end of expression <% end %>", fn ->
EEx.compile_string("foo <% end %>")
end
end
test "when start expression is found without an end expression" do
msg = "nofile:2:18: unexpected end of string, expected a closing '<% end %>'"
assert_raise EEx.SyntaxError, msg, fn ->
EEx.compile_string("foo\n<%= if true do %>")
end
end
test "when nested end expression is found without a start expression" do
assert_raise EEx.SyntaxError, "nofile:1:31: unexpected end of expression <% end %>", fn ->
EEx.compile_string("foo <%= if true do %><% end %><% end %>")
end
end
test "when middle expression has a modifier" do
assert ExUnit.CaptureIO.capture_io(:stderr, fn ->
EEx.compile_string("foo <%= if true do %>true<%= else %>false<% end %>")
end) =~ ~s[unexpected beginning of EEx tag \"<%=\" on \"<%= else %>\"]
end
test "when end expression has a modifier" do
assert ExUnit.CaptureIO.capture_io(:stderr, fn ->
EEx.compile_string("foo <%= if true do %>true<% else %>false<%= end %>")
end) =~
~s[unexpected beginning of EEx tag \"<%=\" on \"<%= end %>\"]
end
test "when trying to use marker '/' without implementation" do
msg =
~r/unsupported EEx syntax <%\/ %> \(the syntax is valid but not supported by the current EEx engine\)/
assert_raise EEx.SyntaxError, msg, fn ->
EEx.compile_string("<%/ true %>")
end
end
test "when trying to use marker '|' without implementation" do
msg =
~r/unsupported EEx syntax <%| %> \(the syntax is valid but not supported by the current EEx engine\)/
assert_raise EEx.SyntaxError, msg, fn ->
EEx.compile_string("<%| true %>")
end
end
end
describe "error messages" do
test "honor line numbers" do
assert_raise EEx.SyntaxError, "nofile:99:12: missing token '%>'", fn ->
EEx.compile_string("foo <%= bar", line: 99)
end
end
test "honor file names" do
assert_raise EEx.SyntaxError, "my_file.eex:1:12: missing token '%>'", fn ->
EEx.compile_string("foo <%= bar", file: "my_file.eex")
end
end
end
describe "environment" do
test "respects line numbers" do
expected = """
foo
2
"""
string = """
foo
<%= __ENV__.line %>
"""
assert_eval(expected, string)
end
test "respects line numbers inside nested expressions" do
expected = """
foo
3
5
"""
string = """
foo
<%= if true do %>
<%= __ENV__.line %>
<% end %>
<%= __ENV__.line %>
"""
assert_eval(expected, string)
end
test "respects line numbers inside start expression" do
expected = """
foo
true
5
"""
string = """
foo
<%= if __ENV__.line == 2 do %>
<%= true %>
<% end %>
<%= __ENV__.line %>
"""
assert_eval(expected, string)
end
test "respects line numbers inside middle expression with ->" do
expected = """
foo
true
7
"""
string = """
foo
<%= cond do %>
<% false -> %> false
<% __ENV__.line == 4 -> %>
<%= true %>
<% end %>
<%= __ENV__.line %>
"""
assert_eval(expected, string)
end
test "respects line number inside middle expressions with keywords" do
expected = """
foo
5
7
"""
string = """
foo
<%= if false do %>
<%= __ENV__.line %>
<% else %>
<%= __ENV__.line %>
<% end %>
<%= __ENV__.line %>
"""
assert_eval(expected, string)
end
test "respects files" do
assert_eval("sample.ex", "<%= __ENV__.file %>", [], file: "sample.ex")
end
end
describe "clauses" do
test "inside functions" do
expected = """
Number 1
Number 2
Number 3
"""
string = """
<%= Enum.map [1, 2, 3], fn x -> %>
Number <%= x %>
<% end %>
"""
assert_eval(expected, string)
end
test "inside multiple functions" do
expected = """
A 1
B 2
A 3
"""
string = """
<%= #{__MODULE__}.switching_map [1, 2, 3], fn x -> %>
A <%= x %>
<% end, fn x -> %>
B <%= x %>
<% end %>
"""
assert_eval(expected, string)
end
test "inside callback and do block" do
expected = """
A 1
B 2
A 3
"""
string = """
<% require #{__MODULE__} %>
<%= #{__MODULE__}.switching_macro [1, 2, 3], fn x -> %>
A <%= x %>
<% end do %>
B <%= x %>
<% end %>
"""
assert_eval(expected, string)
end
test "inside cond" do
expected = """
foo
true
"""
string = """
foo
<%= cond do %>
<% false -> %> false
<% fn -> 1 end -> %>
<%= true %>
<% end %>
"""
assert_eval(expected, string)
end
test "inside cond with do end" do
string = """
<% y = ["a", "b", "c"] %>
<%= cond do %>
<% "a" in y -> %>
Good
<% true -> %>
<%= if true do %>true<% else %>false<% end %>
Bad
<% end %>
"""
assert_eval("\n\n Good\n \n", string)
end
test "line and column meta" do
parser_options = Code.get_compiler_option(:parser_options)
Code.put_compiler_option(:parser_options, columns: true)
try do
indentation = 12
ast =
EEx.compile_string(
"""
<%= f() %> <% f() %>
<%= f fn -> %>
<%= f() %>
<% end %>
""",
indentation: indentation
)
{_, calls} =
Macro.prewalk(ast, [], fn
{:f, meta, _args} = expr, acc -> {expr, [meta | acc]}
other, acc -> {other, acc}
end)
assert Enum.reverse(calls) == [
[line: 1, column: indentation + 5],
[line: 1, column: indentation + 15],
[line: 2, column: indentation + 7],
[line: 3, column: indentation + 9]
]
after
Code.put_compiler_option(:parser_options, parser_options)
end
end
end
describe "buffers" do
test "inside comprehensions" do
string = """
<%= for _name <- packages || [] do %>
<% end %>
<%= all || :done %>
"""
assert_eval("\ndone\n", string, packages: nil, all: nil)
end
end
describe "from file" do
test "evaluates the source" do
filename = Path.join(__DIR__, "fixtures/eex_template.eex")
result = EEx.eval_file(filename)
assert_normalized_newline_equal("foo bar.\n", result)
end
test "evaluates the source with bindings" do
filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
result = EEx.eval_file(filename, bar: 1)
assert_normalized_newline_equal("foo 1\n", result)
end
test "raises an Exception when file is missing" do
msg = "could not read file \"non-existent.eex\": no such file or directory"
assert_raise File.Error, msg, fn ->
filename = "non-existent.eex"
EEx.compile_file(filename)
end
end
test "sets external resource attribute" do
assert EExTest.Compiled.__info__(:attributes)[:external_resource] ==
[Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")]
end
test "supports t:Path.t() paths" do
filename = to_charlist(Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex"))
result = EEx.eval_file(filename, bar: 1)
assert_normalized_newline_equal("foo 1\n", result)
end
assert_raise EEx.SyntaxError, "my_file.eex:1:12: missing token '%>'", fn ->
EEx.compile_string("foo <%= bar", file: "my_file.eex")
end
test "supports overriding file and line through options" do
filename = Path.join(__DIR__, "fixtures/eex_template_with_syntax_error.eex")
assert_raise EEx.SyntaxError, "my_file.eex:11:1: missing token '%>'", fn ->
EEx.eval_file(filename, _bindings = [], file: "my_file.eex", line: 10)
end
end
end
describe "precompiled" do
test "from string" do
assert EExTest.Compiled.string_sample(1, 2) == "3"
end
test "from file" do
assert_normalized_newline_equal("foo 1\n", EExTest.Compiled.file_sample(1))
assert_normalized_newline_equal("foo 1\n", EExTest.Compiled.public_file_sample(1))
end
test "from file does not affect backtrace" do
file = to_charlist(Path.relative_to_cwd(__ENV__.file))
assert EExTest.Compiled.before_compile() ==
{7, {EExTest.Compiled, :before_compile, 0, [file: file, line: 7]}}
assert EExTest.Compiled.after_compile() ==
{21, {EExTest.Compiled, :after_compile, 0, [file: file, line: 21]}}
assert EExTest.Compiled.unknown() ==
{26, {EExTest.Compiled, :unknown, 0, [file: 'unknown', line: 26]}}
end
end
defmodule TestEngine do
@behaviour EEx.Engine
def init(_opts) do
"INIT"
end
def handle_body(body) do
"BODY(#{body})"
end
def handle_begin(_) do
"BEGIN"
end
def handle_end(buffer) do
buffer <> ":END"
end
def handle_text(buffer, meta, text) do
buffer <> ":TEXT-#{meta[:line]}-#{meta[:column]}(#{String.trim(text)})"
end
def handle_expr(buffer, "/", expr) do
buffer <> ":DIV(#{Macro.to_string(expr)})"
end
def handle_expr(buffer, "=", expr) do
buffer <> ":EQUAL(#{Macro.to_string(expr)})"
end
def handle_expr(buffer, mark, expr) do
EEx.Engine.handle_expr(buffer, mark, expr)
end
end
describe "custom engines" do
test "text" do
assert_eval("BODY(INIT:TEXT-1-1(foo))", "foo", [], engine: TestEngine)
end
test "custom marker" do
assert_eval("BODY(INIT:TEXT-1-1(foo):DIV(:bar))", "foo <%/ :bar %>", [], engine: TestEngine)
end
test "begin/end" do
assert_eval(
~s[BODY(INIT:TEXT-1-1(foo):EQUAL(if do\n "BEGIN:TEXT-1-17(this):END"\nelse\n "BEGIN:TEXT-1-31(that):END"\nend))],
"foo <%= if do %>this<% else %>that<% end %>",
[],
engine: TestEngine
)
end
test "not implemented custom marker" do
msg =
~r/unsupported EEx syntax <%| %> \(the syntax is valid but not supported by the current EEx engine\)/
assert_raise EEx.SyntaxError, msg, fn ->
assert_eval({:wrapped, "foo baz"}, "foo <%| :bar %>", [], engine: TestEngine)
end
end
end
describe "parser options" do
test "customizes parsed code" do
atoms_encoder = fn "not_jose", _ -> {:ok, :jose} end
assert_eval("valid", "<%= not_jose %>", [jose: "valid"],
parser_options: [static_atoms_encoder: atoms_encoder]
)
end
end
defp assert_eval(expected, actual, binding \\ [], opts \\ []) do
opts = Keyword.merge([file: __ENV__.file, engine: opts[:engine] || EEx.Engine], opts)
result = EEx.eval_string(actual, binding, opts)
assert result == expected
end
defp assert_normalized_newline_equal(expected, actual) do
assert String.replace(expected, "\r\n", "\n") == String.replace(actual, "\r\n", "\n")
end
def tuple_map({list, callback}) do
Enum.map(list, callback)
end
def switching_map(list, a, b) do
list
|> Enum.with_index()
|> Enum.map(fn
{element, index} when rem(index, 2) == 0 -> a.(element)
{element, index} when rem(index, 2) == 1 -> b.(element)
end)
end
defmacro switching_macro(list, a, do: block) do
quote do
b = fn var!(x) ->
unquote(block)
end
unquote(__MODULE__).switching_map(unquote(list), unquote(a), b)
end
end
end
|