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Refactor CrystalPath::Error #9359
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bcardiff
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crystal-lang:master
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straight-shoota:refactor/crystal-path-error
May 29, 2020
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,10 +1,37 @@ | ||
require "../../spec_helper" | ||
|
||
describe "Semantic: require" do | ||
it "raises crystal exception if can't find require (#7385)" do | ||
node = parse(%(require "file_that_doesnt_exist")) | ||
expect_raises ::Crystal::Exception do | ||
semantic(node) | ||
describe "file not found" do | ||
it "require" do | ||
error = assert_error %(require "file_that_doesnt_exist"), | ||
"can't find file 'file_that_doesnt_exist'", | ||
inject_primitives: false | ||
|
||
error.message.not_nil!.should contain "If you're trying to require a shard:" | ||
end | ||
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||
it "relative require" do | ||
error = assert_error %(require "./file_that_doesnt_exist"), | ||
"can't find file './file_that_doesnt_exist'", | ||
inject_primitives: false | ||
|
||
error.message.not_nil!.should_not contain "If you're trying to require a shard:" | ||
end | ||
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it "wildcard" do | ||
error = assert_error %(require "file_that_doesnt_exist/*"), | ||
"can't find file 'file_that_doesnt_exist/*'", | ||
inject_primitives: false | ||
|
||
error.message.not_nil!.should contain "If you're trying to require a shard:" | ||
end | ||
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it "relative wildcard" do | ||
error = assert_error %(require "./file_that_doesnt_exist/*"), | ||
"can't find file './file_that_doesnt_exist/*'", | ||
inject_primitives: false | ||
|
||
error.message.not_nil!.should_not contain "If you're trying to require a shard:" | ||
end | ||
end | ||
end |
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Can we move this rescue just around
find_in_path
because that's where the error can happen? This makes it much clearer when the exception is expected to happen.There was a problem hiding this comment.
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I considered that, but the problem is that the exception raised there would subsequently be rescued in line 89. I don't think it makes sense to make that rescue handler work around that.
A slightly less confusing option could be to create the error in a rescue around
find_in_path
, assign it to a local variable and only raise in anelse
rescue handler. Not sure if that's worth it, though.There was a problem hiding this comment.
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Oh, I see. Yeah, let's leave it like that for now.
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That said, I don't understand why
CrystalPath::NotFoundError
is handled in a special way here, instead of just being a regular Crystal::Exception and having a sensibleto_s
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The idea was to have
CrystalPath::NotFoundError
as a plain internal error type, not related to any user code interpretation.CrystalPath
should not care wheter it was invoked for arequire
or something else. It also doesn't know the code location, so it can't really create a proper user-facing error.NotFoundError
just communicates that finding a path failed. What that means depends on the context. In the context of interpreting aRequire
node it means the require has failed and an appropriate error is raised for that specific situation.