public void Get_GivenNonExistingKey_ThrowsException()
{
// arrange
var sut = new MemoryBackingStore();
// assert
Assert.Throws<KeyNotFoundException>(() => sut.Get("someKeyThatDoesn'tExist"));
}
public void Get_GivenNullKey_ThrowsException()
{
// arrange
var sut = new MemoryBackingStore();
// assert
Assert.Throws<ArgumentNullException>(() => sut.Get(null));
}
public void Add_GivenNullKey_ThrowsException()
{
// arrange
var sut = new MemoryBackingStore();
// assert
Assert.Throws<ArgumentNullException>(() => sut.Add(null, new object()));
}
public void ContainsKey_GivenNonExistingKey_ReturnsFalse()
{
// arrange
var sut = new MemoryBackingStore();
// act
var containsKey = sut.ContainsKey("someKeyThatDoesn'tExist");
// assert
Assert.That(containsKey, Is.False);
}
[Test] // silently tests MemoryBackingStore.Add as well
public void ContainsKey_GivenExistingKey_ReturnsTrue()
{
// arrange
var sut = new MemoryBackingStore();
sut.Add("ThisKeyExists", new object());
// act
var containsKey = sut.ContainsKey("ThisKeyExists");
// assert
Assert.That(containsKey, Is.True);
}
[Test] // silently tests MemoryBackingStore.Add as well
public void Get_GivenExistingKey_ReturnsValue()
{
// arrange
var sut = new MemoryBackingStore();
var expected = new object();
sut.Add("ThisKeyExists", expected);
// act
var actual = sut.Get("ThisKeyExists");
// assert
Assert.That(actual, Is.SameAs(expected));
}
