shard-ameba/spec/ameba/ast/scope_spec.cr
2018-05-29 09:47:32 +03:00

72 lines
1.9 KiB
Crystal

require "../../spec_helper"
module Ameba::AST
describe Scope do
describe "#initialize" do
source = "a = 2"
it "assigns outer scope" do
root = Scope.new as_node(source)
child = Scope.new as_node(source), root
child.outer_scope.should_not be_nil
end
it "assigns node" do
scope = Scope.new as_node(source)
scope.node.should_not be_nil
end
end
end
describe "#add_variable" do
it "adds a new variable to the scope" do
scope = Scope.new as_node("")
scope.add_variable(Crystal::Var.new "foo")
scope.variables.any?.should be_true
end
end
describe "#find_variable" do
it "returns the variable in the scope by name" do
scope = Scope.new as_node("foo = 1")
scope.add_variable Crystal::Var.new "foo"
scope.find_variable("foo").should_not be_nil
end
it "returns nil if variable not exist in this scope" do
scope = Scope.new as_node("foo = 1")
scope.find_variable("bar").should be_nil
end
end
describe "#assign_variable" do
it "creates a new assignment" do
scope = Scope.new as_node("foo = 1")
scope.add_variable Crystal::Var.new "foo"
scope.assign_variable("foo", Crystal::Var.new "foo")
scope.find_variable("foo").not_nil!.assignments.size.should eq 1
end
it "does not create the assignment if variable is wrong" do
scope = Scope.new as_node("foo = 1")
scope.add_variable Crystal::Var.new "foo"
scope.assign_variable("bar", Crystal::Var.new "bar")
scope.find_variable("foo").not_nil!.assignments.size.should eq 0
end
end
describe "#block?" do
it "returns true if Crystal::Block" do
nodes = as_nodes %(
3.times {}
)
scope = Scope.new nodes.block_nodes.first
scope.block?.should be_true
end
it "returns false otherwise" do
scope = Scope.new as_node "a = 1"
scope.block?.should be_false
end
end
end