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# frozen_string_literal: true
require_relative "../spec_helper"
module SyntaxSuggest
RSpec.describe Visitor do
def visit(source)
ast, _tokens = Prism.parse_lex(source).value
visitor = Visitor.new
visitor.visit(ast)
visitor
end
describe "#consecutive_lines" do
it "detects dot-leading multi-line chains" do
visitor = visit(<<~RUBY)
User
.where(name: "Earlopain")
.first
RUBY
expect(visitor.consecutive_lines).to eq(Set[1, 2])
end
it "detects dot-trailing multi-line chains" do
visitor = visit(<<~RUBY)
User.
where(name: "Earlopain").
first
RUBY
expect(visitor.consecutive_lines).to eq(Set[1, 2])
end
it "handles chains separated by comments" do
visitor = visit(<<~RUBY)
User.
# comment
where(name: "Earlopain").
# another comment
first
RUBY
# The AST sees through comments — every line except
# the last is consecutive regardless of interleaved comments.
expect(visitor.consecutive_lines).to eq(Set[1, 2, 3, 4])
end
it "returns empty for single-line calls" do
visitor = visit(<<~RUBY)
User.where(name: "Earlopain").first
RUBY
expect(visitor.consecutive_lines).to be_empty
end
it "returns empty when there is no method chain" do
visitor = visit(<<~RUBY)
puts "hello"
puts "world"
RUBY
expect(visitor.consecutive_lines).to be_empty
end
it "handles deeply nested chains" do
visitor = visit(<<~RUBY)
User
.where(name: "Earlopain")
.order(:created_at)
.limit(10)
.first
RUBY
expect(visitor.consecutive_lines).to eq(Set[1, 2, 3, 4])
end
end
describe "#endless_def_keyword_offsets" do
it "records the def location for endless methods" do
visitor = visit(<<~RUBY)
def square(x) = x * x
RUBY
expect(visitor.endless_def_keyword_offsets).to eq(Set[0])
end
it "does not record regular method definitions" do
visitor = visit(<<~RUBY)
def square(x)
x * x
end
RUBY
expect(visitor.endless_def_keyword_offsets).to be_empty
end
it "records multiple endless methods" do
visitor = visit(<<~RUBY)
def square(x) = x * x
def double(x) = x * 2
RUBY
expect(visitor.endless_def_keyword_offsets).to eq(Set[0, 22])
end
it "distinguishes endless from regular in the same source" do
visitor = visit(<<~RUBY)
def square(x) = x * x
def cube(x)
x * x * x
end
RUBY
expect(visitor.endless_def_keyword_offsets).to eq(Set[0])
end
end
end
end
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