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9003075ec7
After Crystal 0.15, compiler will require declare the types used
by instance variables on classes.
This require changes to the usage of `Radix::Tree` by introducing
the type of payload elements it will handle:
# Will only support symbols as payload
tree = Radix::Tree(Symbol).new
tree.add "/", :root
# Error: cannot add node with anything other than Symbol
tree.add "/meaning-of-life", 42
The changes ensure future compatibility with Crystal and also
enforces a more declarative usage of `Radix::Tree`.
If necessary, you can combine multiple types to ensure a tree
can contain all the wide range of payloads you need:
tree = Radix::Tree.new(Foo | Bar | Symbol).new
tree.add "/", :root
tree.add "/foo", foo_instance
This change includes:
- Tree, Node and Result has been updated to require types.
- Node is capable of have optional payload (from defined type).
- Documentation has been updated to reflect this change.
109 lines
2.9 KiB
Crystal
109 lines
2.9 KiB
Crystal
require "../spec_helper"
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module Radix
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describe Node do
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describe "#key=" do
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it "accepts change of key after initialization" do
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node = Node(Nil).new("abc")
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node.key.should eq("abc")
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node.key = "xyz"
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node.key.should eq("xyz")
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end
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end
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describe "#payload" do
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it "accepts any form of payload" do
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node = Node.new("abc", :payload)
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node.payload?.should be_truthy
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node.payload.should eq(:payload)
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node = Node.new("abc", 1_000)
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node.payload?.should be_truthy
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node.payload.should eq(1_000)
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end
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# This example focuses on the internal representation of `payload`
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# as inferred from supplied types and default values.
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#
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# We cannot compare `typeof` against `property!` since it excludes `Nil`
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# from the possible types.
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it "makes optional to provide a payload" do
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node = Node(Int32).new("abc")
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node.payload?.should be_falsey
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typeof(node.@payload).should eq(Int32 | Nil)
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end
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end
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describe "#priority" do
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it "calculates it based on key size" do
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node = Node(Nil).new("a")
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node.priority.should eq(1)
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node = Node(Nil).new("abc")
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node.priority.should eq(3)
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end
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it "returns zero for catch all (globbed) key" do
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node = Node(Nil).new("*filepath")
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node.priority.should eq(0)
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node = Node(Nil).new("/src/*filepath")
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node.priority.should eq(0)
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end
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it "returns one for keys with named parameters" do
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node = Node(Nil).new(":query")
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node.priority.should eq(1)
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node = Node(Nil).new("/search/:query")
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node.priority.should eq(1)
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end
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it "changes when key changes" do
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node = Node(Nil).new("a")
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node.priority.should eq(1)
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node.key = "abc"
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node.priority.should eq(3)
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node.key = "*filepath"
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node.priority.should eq(0)
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node.key = ":query"
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node.priority.should eq(1)
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end
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end
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describe "#sort!" do
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it "orders children by priority" do
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root = Node(Int32).new("/")
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node1 = Node(Int32).new("a", 1)
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node2 = Node(Int32).new("bc", 2)
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node3 = Node(Int32).new("def", 3)
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root.children.push(node1, node2, node3)
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root.sort!
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root.children[0].should eq(node3)
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root.children[1].should eq(node2)
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root.children[2].should eq(node1)
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end
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it "orders catch all and named parameters lower than others" do
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root = Node(Int32).new("/")
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node1 = Node(Int32).new("*filepath", 1)
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node2 = Node(Int32).new("abc", 2)
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node3 = Node(Int32).new(":query", 3)
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root.children.push(node1, node2, node3)
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root.sort!
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root.children[0].should eq(node2)
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root.children[1].should eq(node3)
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root.children[2].should eq(node1)
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end
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end
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end
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end
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