public void ServiceThrowsOnRemoveTermWithoutName()
{
var service = new XmlTermsService(String.Empty);
// Test null.
try
{
service.RemoveTerm(new Term(null, String.Empty), Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentException));
Assert.IsTrue(((ArgumentException)ex).ParamName == "term");
}
// Test whitespace.
try
{
service.RemoveTerm(new Term(" ", String.Empty), Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentException));
Assert.IsTrue(((ArgumentException)ex).ParamName == "term");
}
}
/// <summary>
/// Gets an observable that removes an existing term from the storage.
/// </summary>
/// <param name="term">A term to remove from the storage.</param>
/// <param name="scheduler">A scheduler to invoke service operations on.</param>
/// <returns>An observable sequence that removes the specified term and pushes
/// it to subscribers.</returns>
public IObservable <Term> RemoveTerm(Term term, IScheduler scheduler)
{
XmlTermsService.ApplyTermRules(term, "term");
return(Observable
.Return(term, scheduler)
.Do(_ =>
{
var doc = this.LoadStorage();
// Search for a node to remove.
var xTerm = doc
.Descendants(TermXmlNames.TermElement)
.SingleOrDefault(el => el.Attribute(TermXmlNames.TermNameAttribute).Value == term.Name);
if (xTerm == null)
{
throw new InvalidOperationException(String.Format(
Resources.UnableToRemoveNonExistentTerm,
term.Name));
}
xTerm.Remove();
this.SaveStorage(doc);
}));
}
public void ServiceThrowsOnUpdateNullTerm()
{
// Check validation of old term.
var service = new XmlTermsService(String.Empty);
try
{
service.UpdateTerm(null, XmlTermsServiceFixture.SampleTerms[0], Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentNullException));
Assert.IsTrue(((ArgumentNullException)ex).ParamName == "oldTerm");
}
// Check validation of new term.
service = new XmlTermsService(String.Empty);
try
{
service.UpdateTerm(XmlTermsServiceFixture.SampleTerms[0], null, Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentNullException));
Assert.IsTrue(((ArgumentNullException)ex).ParamName == "newTerm");
}
}
public void ServiceThrowsOnUpdateToTermWithoutName()
{
var service = new XmlTermsService(String.Empty);
var nameless = new Term(null, String.Empty);
var whitespace = new Term(" ", String.Empty);
// Test null.
try
{
service.UpdateTerm(XmlTermsServiceFixture.SampleTerms[0], nameless, Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentException));
Assert.IsTrue(((ArgumentException)ex).ParamName == "newTerm");
}
// Test whitespace.
try
{
service.UpdateTerm(XmlTermsServiceFixture.SampleTerms[0], whitespace, Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentException));
Assert.IsTrue(((ArgumentException)ex).ParamName == "newTerm");
}
}
public void ObservableUpdatesAndPushesTerm()
{
var fileName = XmlTermsServiceFixture.TermsToFile(
XmlTermsServiceFixture.SampleTerms,
"ObservableUpdatesAndPushesTerm.xml");
var service = new XmlTermsService(fileName);
var oldTerm = XmlTermsServiceFixture.SampleTerms[0];
var newTerm = new Term("new term0", "new def 0");
Term pushed = null;
service
.UpdateTerm(oldTerm, newTerm, Scheduler.Immediate)
.Subscribe(p => pushed = p);
Assert.AreEqual(newTerm, pushed);
// Check that old term is deleted.
var xTerm = XDocument.Load(fileName)
.Descendants(TermXmlNames.TermElement)
.FirstOrDefault(x => x.Attribute(TermXmlNames.TermNameAttribute).Value == oldTerm.Name);
Assert.IsNull(xTerm);
// Check that new term is added.
xTerm = XDocument.Load(fileName)
.Descendants(TermXmlNames.TermElement)
.FirstOrDefault(x => x.Attribute(TermXmlNames.TermNameAttribute).Value == newTerm.Name);
Assert.IsNotNull(xTerm);
Assert.AreEqual(newTerm.Definition, xTerm.Attribute(TermXmlNames.TermDefinitionAttribute).Value);
}
/// <summary>
/// Gets an observable that adds a new term to the storage.
/// </summary>
/// <param name="term">A term to add to the storage.</param>
/// <param name="scheduler">A scheduler to invoke service operations on.</param>
/// <returns>An observable sequence that adds the specified term and pushes
/// it to subscribers.</returns>
public IObservable <Term> AddTerm(Term term, IScheduler scheduler)
{
XmlTermsService.ApplyTermRules(term, "term");
return(Observable
.Return(term, scheduler)
.Do(_ =>
{
var doc = this.LoadStorage();
// Check whether a term with the same name already exists.
// A client must use UpdateTerm in this case.
if (doc
.Descendants(TermXmlNames.TermElement)
.Any(el => el.Attribute(TermXmlNames.TermNameAttribute).Value == term.Name))
{
throw new InvalidOperationException(String.Format(
Resources.UnableToAddTermAlreadyExists,
term.Name));
}
var xTerm = new XElement(
TermXmlNames.TermElement,
new XAttribute(TermXmlNames.TermNameAttribute, term.Name));
if (!String.IsNullOrEmpty(term.Definition))
{
xTerm.Add(new XAttribute(TermXmlNames.TermDefinitionAttribute, term.Definition));
}
doc.Root.Add(xTerm);
this.SaveStorage(doc);
}));
}
public void ObservableThrowsWhenFileDoesntExist()
{
var service = new XmlTermsService(String.Empty);
ReactiveAssert.Throws <InvalidTermsStorageException>(
() =>
{
service
.LoadTerms(Scheduler.Immediate)
.Subscribe();
});
}
/// <summary>
/// Gets an observable that updates an existing term in the storage.
/// </summary>
/// <param name="oldTerm">An old value of term to update in the storage.</param>
/// <param name="newTerm">A new value of term.</param>
/// <param name="scheduler">A scheduler to invoke service operations on.</param>
/// <returns>An observable sequence that updates the specified term and pushes
/// it to subscribers.</returns>
public IObservable <Term> UpdateTerm(Term oldTerm, Term newTerm, IScheduler scheduler)
{
XmlTermsService.ApplyTermRules(oldTerm, "oldTerm");
XmlTermsService.ApplyTermRules(newTerm, "newTerm");
return(Observable
.Return(newTerm, scheduler)
.Do(_ =>
{
var doc = this.LoadStorage();
// Check whether an old term already exists.
// If it is not, the client must use AddTerm.
var xTerm = doc
.Descendants(TermXmlNames.TermElement)
.SingleOrDefault(el => el.Attribute(TermXmlNames.TermNameAttribute).Value == oldTerm.Name);
if (xTerm == null)
{
throw new InvalidOperationException(String.Format(
Resources.UnableToUpdateNonExistentTerm,
oldTerm.Name));
}
// Check whether a new term already exists if names are different.
if (oldTerm.Name != newTerm.Name)
{
var newTermExists = doc
.Descendants(TermXmlNames.TermElement)
.Any(el => el.Attribute(TermXmlNames.TermNameAttribute).Value == newTerm.Name);
if (newTermExists)
{
throw new InvalidOperationException(String.Format(
Resources.UnableToUpdateToAnotherExistentTerm,
newTerm.Name));
}
}
xTerm.Attribute(TermXmlNames.TermNameAttribute).Value = newTerm.Name;
if (!String.IsNullOrEmpty(newTerm.Definition))
{
xTerm.SetAttributeValue(TermXmlNames.TermDefinitionAttribute, newTerm.Definition);
}
else
{
xTerm.Attribute(TermXmlNames.TermDefinitionAttribute).Remove();
}
this.SaveStorage(doc);
}));
}
public void ObservableLoadsNoTermsFromEmptyValidXml()
{
var service = new XmlTermsService(XmlTermsServiceFixture.TermsToFile(
Enumerable.Empty <Term>(),
"ObservableLoadsNoTermsFromEmptyValidXml.xml"));
var serviceTerms = new List <Term>();
service
.LoadTerms(Scheduler.Immediate)
.Subscribe(terms => serviceTerms.AddRange(terms));
ReactiveAssert.AreElementsEqual(Enumerable.Empty <Term>(), serviceTerms);
}
public void ServiceThrowsOnRecreateNothing()
{
var service = new XmlTermsService(String.Empty);
try
{
service.RecreateStorage(null, Scheduler.Immediate);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(ArgumentNullException));
Assert.IsTrue(((ArgumentNullException)ex).ParamName == "terms");
}
}
public void ObservableThrowsOnAddExistingTerm()
{
var service = new XmlTermsService(XmlTermsServiceFixture.TermsToFile(
XmlTermsServiceFixture.SampleTerms,
"ObservableThrowsOnAddExistingTerm.xml"));
Exception ex = null;
service
.AddTerm(XmlTermsServiceFixture.SampleTerms[0], Scheduler.Immediate)
.Subscribe(_ => { }, ex2 => ex = ex2, () => { });
Assert.IsInstanceOfType(ex, typeof(InvalidOperationException));
Assert.IsTrue(ex.Message.Contains("already exists"));
}
/// <summary>
/// Gets an observable sequence that retrieves terms from the storage.
/// </summary>
/// <param name="scheduler">A scheduler to invoke service operations on.</param>
/// <returns>An observable sequence of portions of terms.</returns>
public IObservable <IEnumerable <Term> > LoadTerms(IScheduler scheduler)
{
return(Observable
.Return(Unit.Default, scheduler)
.SelectMany(_ => this.LoadStorage().Descendants(TermXmlNames.TermElement))
.Select(node => new Term(
node.Attribute(TermXmlNames.TermNameAttribute).Value,
node.Attribute(TermXmlNames.TermDefinitionAttribute).Value))
.Do(term => XmlTermsService.ApplyTermRules(term, "term"))
.Catch((Exception ex) => Observable.Throw <Term>(
XmlTermsService.WrapIntoInvalidStorageException(
ex,
String.Format(Resources.InvalidXmlStorageToLoad, this._fileName))))
.ToArray());
}
public void ObservableThrowsOnRemoveNonExistentTerm()
{
var service = new XmlTermsService(XmlTermsServiceFixture.TermsToFile(
XmlTermsServiceFixture.SampleTerms,
"ObservableThrowsOnRemoveNonExistentTerm.xml"));
var newTerm = new Term("nonExistentTerm", String.Empty);
Exception ex = null;
service
.RemoveTerm(newTerm, Scheduler.Immediate)
.Subscribe(_ => { }, ex2 => ex = ex2, () => { });
Assert.IsInstanceOfType(ex, typeof(InvalidOperationException));
Assert.IsTrue(ex.Message.Contains("doesn't exist"));
}
public void ObservableRecreatesNewStorage()
{
var filePath = Path.Combine(XmlTermsServiceFixture.DeploymentDirectory, "ObservableRecreatesNewStorage.xml");
var service = new XmlTermsService(filePath);
service
.RecreateStorage(XmlTermsServiceFixture.SampleTerms, Scheduler.Immediate)
.Subscribe();
var storedTerms = new List <Term>();
service
.LoadTerms(Scheduler.Immediate)
.Subscribe(terms => storedTerms.AddRange(terms));
ReactiveAssert.AreElementsEqual(XmlTermsServiceFixture.SampleTerms, storedTerms);
}
public void ObservableThrowsFromInvalidXml()
{
var service = new XmlTermsService(XmlTermsServiceFixture.TermsToFile(
new Term[]
{
XmlTermsServiceFixture.SampleTerms[0],
new Term(null, String.Empty),
},
"ObservableThrowsFromInvalidXml.xml"));
ReactiveAssert.Throws <InvalidTermsStorageException>(
() =>
{
service
.LoadTerms(Scheduler.Immediate)
.Subscribe();
});
}
public void ObservableShouldntPushTermsFromInvalidXml()
{
var mix = new Term[]
{
XmlTermsServiceFixture.SampleTerms[0],
new Term(null, null),
XmlTermsServiceFixture.SampleTerms[1],
};
var service = new XmlTermsService(
XmlTermsServiceFixture.TermsToFile(mix, "ObservableShouldntPushTermsFromInvalidXml.xml"));
bool onNextInvoked = false;
service
.LoadTerms(Scheduler.Immediate)
.Subscribe(terms => onNextInvoked = true, _ => { }, () => { });
Assert.IsFalse(onNextInvoked);
}
public void ObservableAddsAndPushesNewTerm()
{
var fileName = XmlTermsServiceFixture.TermsToFile(
XmlTermsServiceFixture.SampleTerms,
"ObservableAddsAndPushesNewTerm.xml");
var service = new XmlTermsService(fileName);
var term = new Term("newTerm", "newDef");
Term pushed = null;
service.AddTerm(term, Scheduler.Immediate).Subscribe(p => pushed = p);
Assert.AreEqual(term, pushed);
var xTerm = XDocument.Load(fileName)
.Descendants(TermXmlNames.TermElement)
.FirstOrDefault(x => x.Attribute(TermXmlNames.TermNameAttribute).Value.Equals(term.Name));
Assert.IsNotNull(xTerm);
Assert.AreEqual(term.Definition, xTerm.Attribute(TermXmlNames.TermDefinitionAttribute).Value);
}
public void ObservableRemovesAndPushesTerm()
{
var fileName = XmlTermsServiceFixture.TermsToFile(
XmlTermsServiceFixture.SampleTerms,
"ObservableRemovesTerm.xml");
var service = new XmlTermsService(fileName);
var term = XmlTermsServiceFixture.SampleTerms[0];
Term pushed = null;
service
.RemoveTerm(term, Scheduler.Immediate)
.Subscribe(p => pushed = p);
Assert.AreEqual(term, pushed);
var xTerm = XDocument.Load(fileName)
.Descendants(TermXmlNames.TermElement)
.FirstOrDefault(x => x.Attribute(TermXmlNames.TermNameAttribute).Value == term.Name);
Assert.IsNull(xTerm);
}
/// <summary>
/// Gets an observable that recreates storage with the specified terms.
/// </summary>
/// <param name="terms">A terms to add to a new storage.</param>
/// <param name="scheduler">A scheduler to invoke service operations on.</param>
/// <returns>An observable sequence that recreates storage.</returns>
public IObservable <Unit> RecreateStorage(IEnumerable <Term> terms, IScheduler scheduler)
{
if (terms == null)
{
throw new ArgumentNullException("terms");
}
return(Observable
.Return(Unit.Default, scheduler)
.Do(_ =>
{
var doc = new XDocument(new XElement(TermXmlNames.TermsElement));
foreach (var term in terms)
{
XmlTermsService.ApplyTermRules(term, "terms");
var xTerm = new XElement(
TermXmlNames.TermElement,
new XAttribute(TermXmlNames.TermNameAttribute, term.Name));
if (!String.IsNullOrEmpty(term.Definition))
{
xTerm.Add(new XAttribute(TermXmlNames.TermDefinitionAttribute, term.Definition));
}
doc.Root.Add(xTerm);
}
this.SaveStorage(doc);
})
.Catch((Exception ex) => Observable.Throw <Unit>(
XmlTermsService.WrapIntoInvalidStorageException(
ex,
String.Format(Resources.InvalidXmlStorageToSave, this._fileName)))));
}
public void ObservableThrowsOnRecreateInvalidTerms()
{
var service = new XmlTermsService(String.Empty);
// Test null.
var invalidTerms = new Term[]
{
XmlTermsServiceFixture.SampleTerms[0],
new Term(null, String.Empty),
};
Exception ex = null;
service
.RecreateStorage(invalidTerms, Scheduler.Immediate)
.Subscribe(_ => { }, ex2 => ex = ex2, () => { });
Assert.IsInstanceOfType(ex, typeof(InvalidTermsStorageException));
// Test whitespace.
invalidTerms = new Term[]
{
XmlTermsServiceFixture.SampleTerms[0],
new Term(" ", String.Empty),
};
ex = null;
service
.RecreateStorage(invalidTerms, Scheduler.Immediate)
.Subscribe(_ => { }, ex2 => ex = ex2, () => { });
Assert.IsInstanceOfType(ex, typeof(InvalidTermsStorageException));
}