public void CreateProjectInstanceFromProject()
{
const string CapturedMetadataName = "DefiningProjectFullPath";
var pc = new ProjectCollection();
var projA = ProjectRootElement.Create(pc);
var projB = ProjectRootElement.Create(pc);
projA.FullPath = Path.Combine(Path.GetTempPath(), "a.proj");
projB.FullPath = Path.Combine(Path.GetTempPath(), "b.proj");
projB.AddImport("a.proj");
projA.AddItem("Compile", "aItem.cs");
projB.AddItem("Compile", "bItem.cs");
var loadSettings = ProjectLoadSettings.RecordDuplicateButNotCircularImports
| ProjectLoadSettings.RejectCircularImports
| ProjectLoadSettings.IgnoreEmptyImports
| ProjectLoadSettings.IgnoreMissingImports
| ProjectLoadSettings.IgnoreInvalidImports;
var projBEval = new Project(projB, null, null, pc, loadSettings);
var projBInstance = new ProjectInstance(projBEval, ProjectInstanceSettings.ImmutableWithFastItemLookup);
var projBInstanceItem = projBInstance.GetItemsByItemTypeAndEvaluatedInclude("Compile", "bItem.cs").Single();
var projAInstanceItem = projBInstance.GetItemsByItemTypeAndEvaluatedInclude("Compile", "aItem.cs").Single();
Assert.Equal(projB.FullPath, projBInstanceItem.GetMetadataValue(CapturedMetadataName));
Assert.Equal(projA.FullPath, projAInstanceItem.GetMetadataValue(CapturedMetadataName));
// Although GetMetadataValue returns non-null, GetMetadata returns null...
Assert.Null(projAInstanceItem.GetMetadata(CapturedMetadataName));
// .. Just like built-in metadata does: (this segment just demonstrates similar functionality -- it's not meant to test built-in metadata)
Assert.NotNull(projAInstanceItem.GetMetadataValue("Identity"));
Assert.Null(projAInstanceItem.GetMetadata("Identity"));
Assert.True(projAInstanceItem.HasMetadata(CapturedMetadataName));
Assert.False(projAInstanceItem.Metadata.Any());
Assert.Contains(CapturedMetadataName, projAInstanceItem.MetadataNames);
Assert.Equal(projAInstanceItem.MetadataCount, projAInstanceItem.MetadataNames.Count);
}