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