91 lines
1.8 KiB
C#
91 lines
1.8 KiB
C#
using System;
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using System.Collections.Generic;
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using AMWD.Common.Cli;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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namespace UnitTests.Common.Cli
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{
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[TestClass]
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public class EnumerableWalkerTests
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{
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private List<string> _list;
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[TestInitialize]
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public void Initialize()
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{
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_list = ["one", "two", "three", "four"];
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}
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[TestMethod]
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[ExpectedException(typeof(ArgumentNullException))]
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public void ShouldThrowExceptionOnNullReference()
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{
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// arrange
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// act
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_ = new EnumerableWalker<object>(null);
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// assert - ArgumentNullException
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Assert.Fail();
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}
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[TestMethod]
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public void ShouldReturnEnumerator()
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{
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// arrange
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var walker = new EnumerableWalker<string>(_list);
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// act
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var enumerator = walker.GetEnumerator();
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// assert
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Assert.IsNotNull(enumerator);
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}
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[TestMethod]
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public void ShouldReturnGenericEnumerator()
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{
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// arrange
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var walker = new EnumerableWalker<string>(_list);
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// act
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var enumerator = ((IEnumerable<string>)walker).GetEnumerator();
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// assert
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Assert.IsNotNull(enumerator);
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}
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[TestMethod]
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public void ShouldReturnItems()
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{
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// arrange
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var walker = new EnumerableWalker<string>(_list);
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_ = walker.GetEnumerator();
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string[] items = new string[_list.Count];
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// act
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for (int i = 0; i < _list.Count; i++)
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items[i] = walker.GetNext();
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// assert
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for (int i = 0; i < _list.Count; i++)
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Assert.AreEqual(_list[i], items[i], $"Position {i} failed");
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}
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[TestMethod]
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public void ShouldReturnDefaultWhenNothingLeft()
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{
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// arrange
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var walker = new EnumerableWalker<string>(Array.Empty<string>());
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_ = walker.GetEnumerator();
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// act
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string item = walker.GetNext();
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// assert
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Assert.AreEqual(default, item);
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}
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}
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}
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