dergrimm/lifo
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

init

Browse source
This commit is contained in:
Dominic Grimm 2021-11-20 13:14:36 +01:00
commit 2c9de8cefd
16 changed files with 554 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

2
spec/spec_helper.cr Normal file
View file

@ -0,0 +1,2 @@
require "spec"
require "../src/lifo"

104
spec/stack/queue.cr Normal file
View file

@ -0,0 +1,104 @@
describe Lifo::Queue do
describe "#initialize" do
it "sets capacity to -1 if none is given" do
queue = Lifo::Queue(Int32).new
queue.capacity.should eq -1
end
end
describe "#enqueue" do
it "enqueues to the queue" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
queue.peek.should eq(1)
queue.enqueue(3)
queue.peek.should eq(1)
queue.enqueue(5)
queue.peek.should eq(1)
end
it "returns queue size" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
queue.enqueue(3)
queue.size.should eq(2)
end
it "raises OverflowError if queue is full" do
queue = Lifo::Queue(Int32).new(0)
expect_raises(Lifo::OverflowError) do
queue.enqueue(1)
end
end
it "doesn't raise an error when queue is infinite" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
end
end
describe "#enqueue?" do
it "enqueues to the queue" do
queue = Lifo::Queue(Int32).new
queue.enqueue?(1)
queue.peek.should eq(1)
queue.enqueue?(3)
queue.peek.should eq(1)
queue.enqueue?(5)
queue.peek.should eq(1)
end
it "returns queue size" do
queue = Lifo::Queue(Int32).new
queue.enqueue?(1)
queue.enqueue?(3)
queue.size.should eq(2)
end
it "returns nil if error raised" do
queue = Lifo::Queue(Int32).new(0)
queue.enqueue?(1).should be_nil
end
end
describe "#dequeue" do
it "dequeues from the queue" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
queue.enqueue(3)
queue.peek.should eq(1)
queue.dequeue
queue.peek.should eq(3)
queue.dequeue
end
it "returns dequeued element" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
queue.enqueue(3)
queue.peek.should eq(1)
queue.dequeue.should eq(1)
queue.dequeue.should eq(3)
end
it "raises UnderflowError if queue is empty" do
queue = Lifo::Queue(Int32).new(0)
expect_raises(Lifo::UnderflowError) do
queue.dequeue
end
end
end
describe "#dequeue?" do
it "dequeues from the queue" do
queue = Lifo::Queue(Int32).new
queue.enqueue(1)
queue.enqueue(3)
queue.peek.should eq(1)
queue.dequeue?
queue.peek.should eq(3)
queue.dequeue?
end
end
end

165
spec/stack/stack.cr Normal file
View file

@ -0,0 +1,165 @@
describe Lifo::Stack do
describe "#initialize" do
it "sets capacity to -1 if none is given" do
stack = Lifo::Stack(Int32).new
stack.capacity.should eq -1
end
end
describe "#push" do
it "pushes to the stack" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.peek.should eq(1)
stack.push(3)
stack.peek.should eq(3)
end
it "returns stack size" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.size.should eq(2)
end
it "raises OverflowError if stack is full" do
stack = Lifo::Stack(Int32).new(0)
expect_raises(Lifo::OverflowError) do
stack.push(1)
end
end
it "doesn't raise an error when stack is infinite" do
stack = Lifo::Stack(Int32).new
stack.push(1)
end
end
describe "#push?" do
it "pushes to the stack" do
stack = Lifo::Stack(Int32).new
stack.push?(1)
stack.peek.should eq(1)
stack.push?(3)
stack.peek.should eq(3)
end
it "returns stack size" do
stack = Lifo::Stack(Int32).new
stack.push?(1)
stack.push?(3)
stack.size.should eq(2)
end
it "returns nil if error raised" do
stack = Lifo::Stack(Int32).new(0)
stack.push?(1).should be_nil
end
end
describe "#pop" do
it "pops from the stack" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.peek.should eq(3)
stack.pop
stack.peek.should eq(1)
stack.pop
end
it "returns popped element" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.pop.should eq(3)
stack.pop.should eq(1)
end
it "raises UnderflowError if stack is empty" do
stack = Lifo::Stack(Int32).new
expect_raises(Lifo::UnderflowError) do
stack.pop
end
end
end
describe "#pop?" do
it "pops from the stack" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.peek.should eq(3)
stack.pop?
stack.peek.should eq(1)
stack.pop?
end
it "returns popped element" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.peek.should eq(3)
stack.pop?.should eq(3)
stack.peek.should eq(1)
stack.pop?.should eq(1)
end
it "returns nil if stack is empty" do
stack = Lifo::Stack(Int32).new
stack.pop?.should be_nil
end
end
describe "#peek" do
it "returns top element" do
stack = Lifo::Stack(Int32).new
stack.push(2)
stack.peek.should eq(2)
end
it "raises UnderflowError if stack is empty" do
stack = Lifo::Stack(Int32).new
expect_raises(Lifo::UnderflowError) do
stack.peek
end
end
end
describe "#peek?" do
it "returns top element" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.peek?.should eq(3)
end
it "returns nil if stack is empty" do
stack = Lifo::Stack(Int32).new
stack.peek?.should be_nil
end
end
describe "#size" do
it "returns stack size" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.push(3)
stack.size.should eq(2)
end
end
describe "#empty?" do
it "returns true if stack is empty" do
stack = Lifo::Stack(Int32).new
stack.empty?.should be_true
end
it "returns false if stack is not empty" do
stack = Lifo::Stack(Int32).new
stack.push(1)
stack.empty?.should be_false
end
end
end

4
spec/stack_spec.cr Normal file
View file

@ -0,0 +1,4 @@
require "./spec_helper"
require "./stack/stack"
require "./stack/queue"