public void AnalyzeProgram_ConsiderAutoPropertyAndFieldsAsSafe()
{
//language=cs
const string sample =
@"using System;
using HotPathAllocationAnalyzer.Support;
public abstract class FooBase
{
public string FullName;
public string Name { get; } = ""Hello"";
public int[] Data { get; } = new int[10];
}
public class Foo : FooBase
{
public int[] Data { get; } = new int[10];
}
[HotPathAllocationAnalyzer.Support.NoAllocation]
public int PerfCritical(Foo f)
{
return f.Name.Length + + f.FullName.Length + f.Data.Length;
}";
var analyser = new MethodCallAnalyzer();
analyser.AddToWhiteList("string.Length");
analyser.AddToWhiteList("System.Array.Length");
var info = ProcessCode(analyser, sample, ImmutableArray.Create(SyntaxKind.InvocationExpression));
Assert.AreEqual(0, info.Allocations.Count);
}
public void AnalyzeProgram_NotAllowCallingExternalMethod_UnlessItIsWhitelisted()
{
//language=cs
const string sample =
@"using System;
using HotPathAllocationAnalyzer.Support;
[HotPathAllocationAnalyzer.Support.NoAllocation]
public bool PerfCritical(string str) {
return str.Contains(""zig"");
}";
var analyser = new MethodCallAnalyzer();
analyser.AddToWhiteList("string.IsNormalized()");
analyser.AddToWhiteList("string.Contains(string)");
var info = ProcessCode(analyser, sample, ImmutableArray.Create(SyntaxKind.InvocationExpression, SyntaxKind.ClassDeclaration));
Assert.AreEqual(0, info.Allocations.Count);
}
public void AnalyzeProgram_NotAllowCallingNonGenericWhitelistedMethods()
{
//language=cs
const string sample =
@"
using System;
using System.Collections.Generic;
using HotPathAllocationAnalyzer.Support;
[HotPathAllocationAnalyzer.Support.NoAllocation]
public int PerfCritical<T>(List<T> l, T val) {
return l.IndexOf(val);
}
";
var analyser = new MethodCallAnalyzer();
analyser.AddToWhiteList("System.Collections.Generic.List<double>.IndexOf(double)");
var info = ProcessCode(analyser, sample, ImmutableArray.Create(SyntaxKind.InvocationExpression));
Assert.AreEqual(1, info.Allocations.Count);
}
public void AnalyzeProgram_AllowCallingGenericWhitelistedProperty()
{
//language=cs
const string sample =
@"using System;
using HotPathAllocationAnalyzer;
public class DateProvider
{
public DateTime? Date { [HotPathAllocationAnalyzer.Support.NoAllocation] get; }
}
[HotPathAllocationAnalyzer.Support.NoAllocation]
public DateTime PerfCritical(DateProvider dp) {
return dp.Date.Value;
}";
var analyser = new MethodCallAnalyzer();
analyser.AddToWhiteList("System.Nullable<T>.Value");
var info = ProcessCode(analyser, sample, ImmutableArray.Create(SyntaxKind.InvocationExpression));
Assert.AreEqual(0, info.Allocations.Count);
}