public void TestScenario01_Roles()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
var expr = parser.ParseRaw("HasAnyRole('MANAGER','TELLER')");
ctx.SetRootObject(new Person("Ben"));
var value = expr.GetValue(ctx, typeof(bool));
Assert.False((bool)value);
ctx.SetRootObject(new Manager("Luke"));
value = expr.GetValue(ctx, typeof(bool));
Assert.True((bool)value);
}
public void TestScenario04_ControllingWhichMethodsRun()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
ctx.SetRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it);
// NEEDS TO OVERRIDE THE REFLECTION ONE - SHOW REORDERING MECHANISM
// Might be better with a as a variable although it would work as a property too...
// Variable references using a '#'
// SpelExpression expr = parser.parseExpression("(hasRole('SUPERVISOR') or (#a < 1.042)) and hasIpAddress('10.10.0.0/16')");
ctx.AddMethodResolver(new MyMethodResolver());
var expr = parser.ParseRaw("(HasRole(3) or (#a < 1.042)) and HasIpAddress('10.10.0.0/16')");
bool value;
ctx.SetVariable("a", 1.0d); // referenced as #a in the expression
value = expr.GetValue <bool>(ctx);
Assert.True((bool)value);
// ctx.setRootObject(new Manager("Luke"));
// ctx.setVariable("a",1.043d);
// value = (bool)expr.GetValue(ctx,typeof(bool));
// assertFalse(value);
}
public void TestPropertyNavigation()
{
var parser = new SpelExpressionParser();
// Inventions Array
var teslaContext = TestScenarioCreator.GetTestEvaluationContext();
// teslaContext.SetRootObject(tesla);
// Evaluates to "Induction motor"
var invention = parser.ParseExpression("Inventions[3]").GetValue <string>(teslaContext);
Assert.Equal("Induction motor", invention);
// Members List
var societyContext = new StandardEvaluationContext();
var ieee = new IEEE();
ieee.Members[0] = Tesla;
societyContext.SetRootObject(ieee);
// Evaluates to "Nikola Tesla"
var name = parser.ParseExpression("Members[0].Name").GetValue <string>(societyContext);
Assert.Equal("Nikola Tesla", name);
// List and Array navigation
// Evaluates to "Wireless communication"
invention = parser.ParseExpression("Members[0].Inventions[6]").GetValue <string>(societyContext);
Assert.Equal("Wireless communication", invention);
}
public void TestDictionaryAccess()
{
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
// Officer's Dictionary
var pupin = parser.ParseExpression("Officers['president']").GetValue <Inventor>(societyContext);
Assert.NotNull(pupin);
// Evaluates to "Idvor"
var city = parser.ParseExpression("Officers['president'].PlaceOfBirth.City").GetValue <string>(societyContext);
Assert.NotNull(city);
// setting values
var i = parser.ParseExpression("Officers['advisors'][0]").GetValue <Inventor>(societyContext);
Assert.Equal("Nikola Tesla", i.Name);
parser.ParseExpression("Officers['advisors'][0].PlaceOfBirth.Country").SetValue(societyContext, "Croatia");
var i2 = parser.ParseExpression("Reverse[0]['advisors'][0]").GetValue <Inventor>(societyContext);
Assert.Equal("Nikola Tesla", i2.Name);
}
public void TestSelection()
{
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
var list = (List <object>)parser.ParseExpression("Members2.?[Nationality == 'Serbian']").GetValue(societyContext);
Assert.Single(list);
Assert.Equal("Nikola Tesla", ((Inventor)list[0]).Name);
}
public void TestMethodFiltering_SPR6764()
{
var parser = new SpelExpressionParser();
var context = new StandardEvaluationContext();
context.SetRootObject(new TestObject());
var filter = new LocalFilter();
context.RegisterMethodFilter(typeof(TestObject), filter);
// Filter will be called but not do anything, so first doit() will be invoked
var expr = (SpelExpression)parser.ParseExpression("DoIt(1)");
var result = expr.GetValue <string>(context);
Assert.Equal("1", result);
Assert.True(filter.FilterCalled);
// Filter will now remove non @Anno annotated methods
filter.RemoveIfNotAnnotated = true;
filter.FilterCalled = false;
expr = (SpelExpression)parser.ParseExpression("DoIt(1)");
result = expr.GetValue <string>(context);
Assert.Equal("double 1.0", result);
Assert.True(filter.FilterCalled);
// check not called for other types
filter.FilterCalled = false;
context.SetRootObject("abc".Clone());
expr = (SpelExpression)parser.ParseExpression("[0]");
result = expr.GetValue <string>(context);
Assert.Equal("a", result);
Assert.False(filter.FilterCalled);
// check de-registration works
filter.FilterCalled = false;
context.RegisterMethodFilter(typeof(TestObject), null); // clear filter
context.SetRootObject(new TestObject());
expr = (SpelExpression)parser.ParseExpression("DoIt(1)");
result = expr.GetValue <string>(context);
Assert.Equal("1", result);
Assert.False(filter.FilterCalled);
}
public void TestConstructors()
{
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
var einstein = parser.ParseExpression("new Steeltoe.Common.Expression.Internal.Spring.TestResources.Inventor('Albert Einstein',new DateTime(1879, 3, 14), 'German')").GetValue <Inventor>();
Assert.Equal("Albert Einstein", einstein.Name);
// create new inventor instance within add method of List
parser.ParseExpression("Members2.Add(new Steeltoe.Common.Expression.Internal.Spring.TestResources.Inventor('Albert Einstein', 'German'))").GetValue(societyContext);
}
public void TestScenario03_Arithmetic()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
// Might be better with a as a variable although it would work as a property too...
// Variable references using a '#'
var expr = parser.ParseRaw("(HasRole('SUPERVISOR') or (#a < 1.042)) and HasIpAddress('10.10.0.0/16')");
bool value;
ctx.SetVariable("a", 1.0d); // referenced as #a in the expression
ctx.SetRootObject(new Supervisor("Ben")); // so non-qualified references 'hasRole()' 'hasIpAddress()' are invoked against it
value = expr.GetValue <bool>(ctx);
Assert.True((bool)value);
ctx.SetRootObject(new Manager("Luke"));
ctx.SetVariable("a", 1.043d);
value = expr.GetValue <bool>(ctx);
Assert.False((bool)value);
}
public void TestEqualityCheck()
{
var parser = new SpelExpressionParser();
var context = new StandardEvaluationContext();
context.SetRootObject(Tesla);
var exp = parser.ParseExpression("Name == 'Nikola Tesla'");
var isEqual = exp.GetValue <bool>(context);
Assert.True(isEqual);
}
public void TestVariables()
{
var tesla = new Inventor("Nikola Tesla", "Serbian");
var context = new StandardEvaluationContext();
context.SetVariable("newName", "Mike Tesla");
context.SetRootObject(tesla);
parser.ParseExpression("Foo = #newName").GetValue(context);
Assert.Equal("Mike Tesla", tesla.Foo);
}
private static void SetupRootContextObject(StandardEvaluationContext testContext)
{
var c = new GregorianCalendar();
var tesla = new Inventor("Nikola Tesla", c.ToDateTime(1856, 7, 9, 0, 0, 0, GregorianCalendar.CurrentEra), "Serbian");
tesla.PlaceOfBirth = new PlaceOfBirth("SmilJan");
tesla.Inventions = new string[]
{
"Telephone repeater", "Rotating magnetic field principle",
"Polyphase alternating-current system", "Induction motor", "Alternating-current power transmission",
"Tesla coil transformer", "Wireless communication", "Radio", "Fluorescent lights"
};
testContext.SetRootObject(tesla);
}
public void TestScenario02_ComparingNames()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
ctx.AddPropertyAccessor(new SecurityPrincipalAccessor());
// Multiple options for supporting this expression: "p.name == principal.name"
// (1) If the right person is the root context object then "name==principal.name" is good enough
var expr = parser.ParseRaw("Name == Principal.Name");
ctx.SetRootObject(new Person("Andy"));
var value = expr.GetValue(ctx, typeof(bool));
Assert.True((bool)value);
ctx.SetRootObject(new Person("Christian"));
value = expr.GetValue(ctx, typeof(bool));
Assert.False((bool)value);
// (2) Or register an accessor that can understand 'p' and return the right person
expr = parser.ParseRaw("P.Name == Principal.Name");
var pAccessor = new PersonAccessor();
ctx.AddPropertyAccessor(pAccessor);
ctx.SetRootObject(null);
pAccessor.ActivePerson = new Person("Andy");
value = expr.GetValue(ctx, typeof(bool));
Assert.True((bool)value);
pAccessor.ActivePerson = new Person("Christian");
value = expr.GetValue(ctx, typeof(bool));
Assert.False((bool)value);
}
public void TestMethodInvocation2()
{
// string literal, Evaluates to "bc"
var c = parser.ParseExpression("'abc'.Substring(1, 2)").GetValue <string>();
Assert.Equal("bc", c);
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
// Evaluates to true
var isMember = parser.ParseExpression("IsMember('Mihajlo Pupin')").GetValue <bool>(societyContext);
Assert.True(isMember);
}
public void TestRootObject()
{
// The constructor arguments are name, birthday, and nationaltiy.
var tesla = new Inventor("Nikola Tesla", new DateTime(1856, 7, 9), "Serbian");
var parser = new SpelExpressionParser();
var exp = parser.ParseExpression("Name");
var context = new StandardEvaluationContext();
context.SetRootObject(tesla);
var name = (string)exp.GetValue(context);
Assert.Equal("Nikola Tesla", name);
}
public void TestScenario_UsingADifferentRootContextobject()
{
// Create a parser
var parser = new SpelExpressionParser();
// Use the standard evaluation context
var ctx = new StandardEvaluationContext();
var tc = new TestClass
{
Property = 42,
Str = "wibble"
};
ctx.SetRootObject(tc);
// read it, set it, read it again
var expr = parser.ParseRaw("Str");
var value = expr.GetValue(ctx);
Assert.Equal("wibble", value);
expr = parser.ParseRaw("Str");
expr.SetValue(ctx, "wobble");
expr = parser.ParseRaw("Str");
value = expr.GetValue(ctx);
Assert.Equal("wobble", value);
// or using assignment within the expression
expr = parser.ParseRaw("Str='wabble'");
value = expr.GetValue(ctx);
expr = parser.ParseRaw("Str");
value = expr.GetValue(ctx);
Assert.Equal("wabble", value);
// private property will be accessed through getter()
expr = parser.ParseRaw("Property");
value = expr.GetValue(ctx);
Assert.Equal(42, value);
// ... and set through setter
expr = parser.ParseRaw("Property=4");
value = expr.GetValue(ctx);
expr = parser.ParseRaw("Property");
value = expr.GetValue(ctx);
Assert.Equal(4, value);
}
public void TestAssignment()
{
var inventor = new Inventor();
var inventorContext = new StandardEvaluationContext();
inventorContext.SetRootObject(inventor);
parser.ParseExpression("Foo").SetValue(inventorContext, "Alexander Seovic2");
Assert.Equal("Alexander Seovic2", parser.ParseExpression("Foo").GetValue <string>(inventorContext));
// alternatively
var aleks = parser.ParseExpression("Foo = 'Alexandar Seovic'").GetValue <string>(inventorContext);
Assert.Equal("Alexandar Seovic", parser.ParseExpression("Foo").GetValue <string>(inventorContext));
Assert.Equal("Alexandar Seovic", aleks);
}
public void IndexIntoGenericPropertyContainingMapobject()
{
var property = new Dictionary <string, Dictionary <string, string> >();
var map = new Dictionary <string, string>();
map.Add("foo", "bar");
property.Add("property", map);
var parser = new SpelExpressionParser();
var context = new StandardEvaluationContext();
context.AddPropertyAccessor(new MapAccessor());
context.SetRootObject(property);
var expression = parser.ParseExpression("property");
Assert.Equal(typeof(Dictionary <string, string>), expression.GetValueType(context));
Assert.Equal(map, expression.GetValue(context));
Assert.Equal(map, expression.GetValue(context, typeof(IDictionary)));
expression = parser.ParseExpression("property['foo']");
Assert.Equal("bar", expression.GetValue(context));
}
public void TestLogicalOperators()
{
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
// -- AND --
// Evaluates to false
var falseValue = parser.ParseExpression("true and false").GetValue <bool>();
Assert.False(falseValue);
// Evaluates to true
var expression = "IsMember('Nikola Tesla') and IsMember('Mihajlo Pupin')";
var trueValue = parser.ParseExpression(expression).GetValue <bool>(societyContext);
// -- OR --
// Evaluates to true
trueValue = parser.ParseExpression("true or false").GetValue <bool>();
Assert.True(trueValue);
// Evaluates to true
expression = "IsMember('Nikola Tesla') or IsMember('Albert Einstien')";
trueValue = parser.ParseExpression(expression).GetValue <bool>(societyContext);
Assert.True(trueValue);
// -- NOT --
// Evaluates to false
falseValue = parser.ParseExpression("!true").GetValue <bool>();
Assert.False(falseValue);
// -- AND and NOT --
expression = "IsMember('Nikola Tesla') and !IsMember('Mihajlo Pupin')";
falseValue = parser.ParseExpression(expression).GetValue <bool>(societyContext);
Assert.False(falseValue);
}
public void TestTernary()
{
var falsestring = parser.ParseExpression("false ? 'trueExp' : 'falseExp'").GetValue <string>();
Assert.Equal("falseExp", falsestring);
var societyContext = new StandardEvaluationContext();
societyContext.SetRootObject(new IEEE());
parser.ParseExpression("Name").SetValue(societyContext, "IEEE");
societyContext.SetVariable("queryName", "Nikola Tesla");
var expression = "IsMember(#queryName)? #queryName + ' is a member of the ' "
+ "+ Name + ' Society' : #queryName + ' is not a member of the ' + Name + ' Society'";
var queryResultstring = parser.ParseExpression(expression).GetValue <string>(societyContext);
Assert.Equal("Nikola Tesla is a member of the IEEE Society", queryResultstring);
// queryResultstring = "Nikola Tesla is a member of the IEEE Society"
}
