require 'spec_helper'

require 'method_log/scope'

module MethodLog
  describe Scope do
    let(:root) { Scope::Root.new }

    it 'ruby interactive style method identifier for top-level module' do
      a = root.define(:A)
      expect(a.method_identifier('foo')).to eq('A#foo')
    end

    it 'ruby interactive style method identifier for module nested inside top-level module' do
      a = root.define(:A)
      b = a.define(:B)
      expect(b.method_identifier('foo')).to eq('A::B#foo')
    end

    it 'ruby interactive style method identifier for module nested inside module nested inside top-level module' do
      a = root.define(:A)
      b = a.define(:B)
      c = b.define(:C)
      expect(c.method_identifier('foo')).to eq('A::B::C#foo')
    end

    it 'ruby interactive style method identifier for method on singleton class' do
      a = root.define(:A)
      singleton = a.singleton
      expect(singleton.method_identifier('foo')).to eq('A.foo')
    end

    it 'ruby interactive style method identifier for method on singleton class nested inside top-level module' do
      a = root.define(:A)
      b = a.define(:B)
      singleton = b.singleton
      expect(singleton.method_identifier('foo')).to eq('A::B.foo')
    end

    it 'looks up scope for top-level module' do
      a = root.define(:A)
      expect(a.lookup(:A)).to eq(a)
    end

    it 'looks up scopes for top-level module and nested module from nested module' do
      a = root.define(:A)
      b = a.define(:B)
      expect(b.lookup(:A)).to eq(a)
      expect(b.lookup(:B)).to eq(b)
    end

    it 'looks up scopes for modules from double-nested module' do
      a = root.define(:A)
      b = a.define(:B)
      c = b.define(:C)
      expect(c.lookup(:A)).to eq(a)
      expect(c.lookup(:B)).to eq(b)
      expect(c.lookup(:C)).to eq(c)
    end

    it 'looks up qualified module' do
      a = root.define(:A)
      b = a.define(:B)
      c = b.define(:C)
      expect(c.for([:A])).to eq(a)
      expect(c.for([:A, :B])).to eq(b)
      expect(c.for([:A, :B, :C])).to eq(c)
    end

    it 'defines missing modules' do
      root.for([:A, :B, :C])
      a = root.lookup(:A)
      b = a.lookup(:B)
      c = b.lookup(:C)
      expect(a).not_to be_nil
      expect(b).not_to be_nil
      expect(c).not_to be_nil
    end

    it 'returns root scope' do
      a = root.define(:A)
      b = a.define(:B)
      c = b.define(:C)
      expect(c.root).to eq(root)
    end

    it 'looks up ambiguous module via top-level module' do
      a = root.define(:A)
      b = a.define(:B)
      c = root.define(:C)
      aa = c.define(:A)
      bb = aa.define(:B)

      expect(c.for([:root, :A, :B])).to eq(b)
    end
  end
end