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457 lines (376 loc) · 13.3 KB
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using System.Reflection;
using System.Text;
using FluentAssertions;
using Xunit;
namespace QuantumConcepts.Formats.StereoLithography.Test
{
public class STLDocumentTests
{
[Fact]
public void Read__FromTextStream()
{
STLDocument stlString;
using (var stream = GetData("ASCII.stl"))
{
stlString = STLDocument.Read(stream);
}
ValidateSTL(stlString);
}
[Fact]
public void Read__FromBinaryStream()
{
STLDocument stlBinary;
using (var stream = GetData("Binary.stl"))
{
stlBinary = STLDocument.Read(stream);
}
ValidateSTL(stlBinary);
}
[Fact]
public void Read__FromTextReader()
{
STLDocument stl;
using (var stream = GetData("ASCII.stl"))
{
using (var reader = new StreamReader(stream, Encoding.ASCII, true, 1024, true))
{
stl = STLDocument.Read(reader);
}
}
ValidateSTL(stl);
}
[Fact]
public void Read__FromBinaryReader()
{
STLDocument stl;
using (var stream = GetData("Binary.stl"))
{
using (var reader = new BinaryReader(stream))
{
{
stl = STLDocument.Read(reader);
}
}
}
ValidateSTL(stl);
}
[Fact]
public void Read__FromString()
{
string stlText;
STLDocument stl;
using (var stream = GetData("ASCII.stl"))
using (var reader = new StreamReader(stream))
{
stlText = reader.ReadToEnd();
}
stl = STLDocument.Read(stlText);
ValidateSTL(stl);
}
[Fact]
public void Read__FromStream__LeavesStreamOpen()
{
STLDocument stl;
using (var stream = GetData("ASCII.stl"))
{
stl = STLDocument.Read(stream);
try
{
stream.ReadByte();
}
catch (ObjectDisposedException)
{
throw new Exception("Stream is closed.");
}
}
}
[Fact]
public void Open__FromFilePath()
{
STLDocument stl;
using (var inStream = GetData("ASCII.stl"))
{
string tempFilePath = Path.GetTempFileName();
using (var outStream = File.Create(tempFilePath))
{
inStream.CopyTo(outStream);
}
stl = STLDocument.Open(tempFilePath);
try
{
File.Delete(tempFilePath);
}
catch { /* Ignore. */ }
}
ValidateSTL(stl);
}
[Fact]
public void WriteText__ToStream__Then__Read__FromStream__ProducesSameDocument()
{
STLDocument stl1 = new STLDocument("WriteString", new List<Facet>()
{
new Facet(new Normal( 0.23f, 0, 1), new List<Vertex>()
{
new Vertex( 0, 0, 0),
new Vertex(-10.123f, -10, 0),
new Vertex(-10.123f, 0, 0)
}, 0)
});
STLDocument stl2;
byte[] stl1Data;
string stl1String;
byte[] stl2Data;
string stl2String;
using (var stream = new MemoryStream())
{
stl1.WriteText(stream);
stl1Data = stream.ToArray();
stl1String = Encoding.ASCII.GetString(stl1Data);
}
using (var stream = new MemoryStream(stl1Data))
{
stl2 = STLDocument.Read(stream);
stl2Data = stream.ToArray();
stl2String = Encoding.ASCII.GetString(stl2Data);
}
CompareSTLs(stl1, stl2);
Assert.Equal(stl1String, stl2String);
}
[Fact]
public void WriteBinary__ToStream__Then__Read__FromStream__ProducesSameDocument()
{
STLDocument stl1 = new STLDocument("WriteBinary", new List<Facet>()
{
new Facet(new Normal( 0, 0, 1), new List<Vertex>()
{
new Vertex( 0, 0, 0),
new Vertex(-10, -10, 0),
new Vertex(-10, 0, 0)
}, 0)
});
STLDocument stl2;
byte[] stl1Data;
byte[] stl2Data;
using (var stream = new MemoryStream())
{
stl1.WriteBinary(stream);
stl1Data = stream.ToArray();
}
using (var stream = new MemoryStream(stl1Data))
{
stl2 = STLDocument.Read(stream);
stl2Data = stream.ToArray();
}
CompareSTLs(stl1, stl2, true);
Assert.True(stl1Data.SequenceEqual(stl2Data));
}
[Fact]
public void SaveAsText()
{
STLDocument stl;
STLDocument stlText;
string stlTextPath = Path.GetTempFileName();
using (var stream = GetData("ASCII.stl"))
{
stl = STLDocument.Read(stream);
}
stl.SaveAsText(stlTextPath);
stlText = STLDocument.Open(stlTextPath);
ValidateSTL(stlText);
try { File.Delete(stlTextPath); }
catch { }
}
[Fact]
public void SaveAsBinary()
{
STLDocument stl;
STLDocument stlBinary;
string stlBinaryPath = Path.GetTempFileName();
using (var stream = GetData("ASCII.stl"))
{
stl = STLDocument.Read(stream);
}
stl.SaveAsBinary(stlBinaryPath);
stlBinary = STLDocument.Open(stlBinaryPath);
ValidateSTL(stlBinary);
try { File.Delete(stlBinaryPath); }
catch { }
}
[Fact]
public void CopyAsText()
{
STLDocument stlStringFrom;
STLDocument stlStringTo;
STLDocument stlBinaryFrom;
STLDocument stlBinaryTo;
using (var inStream = GetData("ASCII.stl"))
using (var outStream = new MemoryStream())
{
stlStringFrom = STLDocument.Read(inStream);
stlStringTo = STLDocument.CopyAsText(inStream, outStream);
}
Assert.NotNull(stlStringFrom);
Assert.NotNull(stlStringTo);
Assert.Equal(stlStringFrom, stlStringTo);
using (var inStream = GetData("Binary.stl"))
using (var outStream = new MemoryStream())
{
stlBinaryFrom = STLDocument.Read(inStream);
stlBinaryTo = STLDocument.CopyAsText(inStream, outStream);
}
Assert.NotNull(stlBinaryFrom);
Assert.NotNull(stlBinaryTo);
Assert.Equal(stlBinaryFrom, stlBinaryTo);
}
[Fact]
public void CopyAsBinary()
{
STLDocument stlStringFrom;
STLDocument stlStringTo;
STLDocument stlBinaryFrom;
STLDocument stlBinaryTo;
using (var inStream = GetData("ASCII.stl"))
using (var outStream = new MemoryStream())
{
stlStringFrom = STLDocument.Read(inStream);
stlStringTo = STLDocument.CopyAsBinary(inStream, outStream);
}
Assert.NotNull(stlStringFrom);
Assert.NotNull(stlStringTo);
Assert.Equal(stlStringFrom, stlStringTo);
using (var inStream = GetData("Binary.stl"))
using (var outStream = new MemoryStream())
{
stlBinaryFrom = STLDocument.Read(inStream);
stlBinaryTo = STLDocument.CopyAsBinary(inStream, outStream);
}
Assert.NotNull(stlBinaryFrom);
Assert.NotNull(stlBinaryTo);
Assert.Equal(stlBinaryFrom, stlBinaryTo);
}
[Fact]
public void Equalz()
{
var stls = new STLDocument[2];
for (int i = 0; i < stls.Length; i++)
{
using (var stream = GetData("ASCII.stl"))
{
using (var reader = new StreamReader(stream))
{
stls[i] = STLDocument.Read(reader);
}
}
}
Assert.Equal(stls[0], stls[1]);
}
[Fact]
public void AppendFacets()
{
STLDocument stl1;
STLDocument stl2;
int facetCount = 0;
using (var stream = GetData("ASCII.stl"))
{
stl1 = STLDocument.Read(stream);
stl2 = STLDocument.Read(stream);
}
ValidateSTL(stl1);
ValidateSTL(stl2);
facetCount = (stl1.Facets.Count + stl2.Facets.Count);
stl1.AppendFacets(stl2);
ValidateSTL(stl1, facetCount);
}
[Fact]
public void ShiftFacets()
{
STLDocument stl1;
STLDocument stl2;
Vertex shift = new Vertex(100, -100, 50);
using (var stream = GetData("ASCII.stl"))
{
stl1 = STLDocument.Read(stream);
stl2 = STLDocument.Read(stream);
}
stl2.Facets.Shift(shift);
for (int f = 0; f < stl1.Facets.Count; f++)
{
for (int v = 0; v < stl1.Facets[f].Vertices.Count; v++)
{
Assert.Equal(stl1.Facets[f].Vertices[v].X, stl2.Facets[f].Vertices[v].X - shift.X);
Assert.Equal(stl1.Facets[f].Vertices[v].Y, stl2.Facets[f].Vertices[v].Y - shift.Y);
Assert.Equal(stl1.Facets[f].Vertices[v].Z, stl2.Facets[f].Vertices[v].Z - shift.Z);
}
}
}
[Fact]
public void InvertFacets()
{
STLDocument stl1;
STLDocument stl2;
using (var stream = GetData("ASCII.stl"))
{
stl1 = STLDocument.Read(stream);
stl2 = STLDocument.Read(stream);
}
stl2.Facets.Invert();
for (int f = 0; f < stl1.Facets.Count; f++)
{
for (int v = 0; v < stl1.Facets[f].Vertices.Count; v++)
{
Assert.Equal(stl1.Facets[f].Normal.X, (stl2.Facets[f].Normal.X * -1));
Assert.Equal(stl1.Facets[f].Normal.Y, (stl2.Facets[f].Normal.Y * -1));
Assert.Equal(stl1.Facets[f].Normal.Z, (stl2.Facets[f].Normal.Z * -1));
}
}
}
private Stream GetData(string filename)
{
var assembly = Assembly.GetExecutingAssembly();
var interpolatedFilename = $"Tests.Data.{filename}";
var stream = assembly.GetManifestResourceStream(interpolatedFilename);
if (stream == null)
{
throw new Exception($"Failed to load resource stream: {interpolatedFilename}");
}
else
{
return stream;
}
}
private void ValidateSTL(STLDocument stl, int expectedFacetCount = 12)
{
Assert.NotNull(stl);
Assert.Equal(expectedFacetCount, stl.Facets.Count);
foreach (var facet in stl.Facets)
Assert.Equal(3, facet.Vertices.Count);
}
private void CompareSTLs(STLDocument doc1, STLDocument doc2, bool isBinary = false)
{
CompareSTLsLeftToRight(doc1, doc2, isBinary);
CompareSTLsLeftToRight(doc2, doc1, isBinary);
}
private void CompareSTLsLeftToRight(STLDocument left, STLDocument right, bool isBinary = false)
{
if (!isBinary) right.Name.Should().Be(left.Name);
right.Facets.Count.Should().Be(left.Facets.Count);
for (var f = 0; f < left.Facets.Count; f++)
{
var leftFacet = left.Facets[f];
var rightFacet = right.Facets[f];
if (isBinary) rightFacet.AttributeByteCount.Should().Be(leftFacet.AttributeByteCount);
rightFacet.Normal.X.Should().Be(leftFacet.Normal.X);
rightFacet.Normal.Y.Should().Be(leftFacet.Normal.Y);
rightFacet.Normal.Z.Should().Be(leftFacet.Normal.Z);
for (var v = 0; v < leftFacet.Vertices.Count; v++)
{
var leftVertice = leftFacet.Vertices[v];
var rightVertice = rightFacet.Vertices[v];
rightVertice.X.Should().Be(leftVertice.X, $"vertices at index {v} should be equal");
rightVertice.Y.Should().Be(leftVertice.Y, $"vertices at index {v} should be equal");
rightVertice.Z.Should().Be(leftVertice.Z, $"vertices at index {v} should be equal");
}
}
}
}
}
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