Viewing is open to everyone. Downloading and starring need a GitHub sign-in. Sign in with GitHub

DecoderTests.cs

v0.1.0-build.85 Latest Commit ede38f5 7 Nov 2026

Size: 4.3 KB
Lines: 103
Language: csharp
SHA-256: 64f987c88676…

View on GitHub

1	using System;
2	using System.Text;
3	using Xunit;
4
5	namespace OpenCKey.Tests
6	{
7	public class DecoderTests
8	{
9	[Fact]
10	public void RoundTripsTextThroughTheFullFramePipeline()
11	{
12	var symbol = CKeySymbol.Encode("https://openckey.org/hello");
13	byte[] frame = Frames.Frame(symbol, out int w, out int h, out int stride);
14	CKeyResult? result = CKeyDecoder.Decode(frame, w, h, stride);
15	Assert.NotNull(result);
16	Assert.Equal(CKeyProfile.Scalable, result!.Profile);
17	Assert.Equal(symbol.Version, result.Version);
18	Assert.Equal(Layout.Standard, result.Layout);
19	Assert.Equal("https://openckey.org/hello", result.Text);
20	Assert.Equal(8, result.Quad.Length);
21	Assert.Equal(CKeyActionKind.Web, result.Action!.Kind);
22	Assert.Equal("Open openckey.org", result.Action.Label);
23	Assert.StartsWith("Profile 0 · v", result.ProfileName);
24	}
25
26	[Fact]
27	public void RoundTripsPrintLayoutAndBinaryPayloads()
28	{
29	var payload = new byte[] { 0, 1, 2, 0xff, 0xfe, 7, 0x80 };
30	var symbol = CKeySymbol.Encode(payload, layout: Layout.Print);
31	byte[] frame = Frames.Frame(symbol, out int w, out int h, out int stride);
32	CKeyResult? result = CKeyDecoder.Decode(frame, w, h, stride);
33	Assert.NotNull(result);
34	Assert.Equal(Layout.Print, result!.Layout);
35	Assert.Equal(payload, result.Payload);
36	Assert.Null(result.Text);
37	Assert.Null(result.Action);
38	Assert.Equal("000102fffe0780", result.PayloadHex);
39	}
40
41	[Fact]
42	public void RoundTripsALargerVersion()
43	{
44	string text = new string('x', 600);
45	var symbol = CKeySymbol.Encode(text);
46	Assert.True(symbol.Version > 5);
47	// About 4 pixels per module.
48	int size = (int)Math.Ceiling(31.0 * 4 * symbol.ModulesAcross / 29.0);
49	var gray = symbol.RenderGray(size, RasterPolicy.Binary);
50	int w = size + 200, h = size + 160, stride = w;
51	byte[] frame = Frames.Embed(gray, w, h, stride, 100, 80);
52	Assert.Equal(text, CKeyDecoder.Decode(frame, w, h, stride)?.Text);
53	}
54
55	[Fact]
56	public void FindBordersThenDecodeCandidate()
57	{
58	var symbol = CKeySymbol.Encode("split detection");
59	byte[] frame = Frames.Frame(symbol, out int w, out int h, out int stride);
60	double[][] borders = CKeyDecoder.FindBorders(frame, w, h, stride);
61	Assert.NotEmpty(borders);
62	Assert.Equal("split detection", CKeyDecoder.DecodeCandidate(frame, w, h, stride, borders[0])?.Text);
63	}
64
65	[Fact]
66	public void BlankFrameDecodesNothing()
67	{
68	var frame = new byte[320 * 240];
69	Array.Fill(frame, (byte)200);
70	Assert.Null(CKeyDecoder.Decode(frame, 320, 240, 320));
71	}
72
73	[Fact]
74	public void ValidatesFrameArguments()
75	{
76	var frame = new byte[100];
77	Assert.Throws<ArgumentOutOfRangeException>(() => CKeyDecoder.Decode(frame, 0, 10, 10));
78	Assert.Throws<ArgumentOutOfRangeException>(() => CKeyDecoder.Decode(frame, 10, 10, 9));
79	Assert.Throws<ArgumentException>(() => CKeyDecoder.Decode(frame, 10, 11, 10));
80	Assert.Throws<ArgumentException>(() => CKeyDecoder.DecodeCandidate(frame, 10, 10, 10, new double[7]));
81	}
82
83	[Fact]
84	public void DecodeIsThreadSafe()
85	{
86	var symbol = CKeySymbol.Encode("parallel");
87	byte[] frame = Frames.Frame(symbol, out int w, out int h, out int stride);
88	var texts = new string?[8];
89	System.Threading.Tasks.Parallel.For(0, texts.Length, i => texts[i] = CKeyDecoder.Decode(frame, w, h, stride)?.Text);
90	Assert.All(texts, t => Assert.Equal("parallel", t));
91	}
92
93	[Fact]
94	public void UnicodeText()
95	{
96	const string text = "Grüße · 東京 · ✓";
97	var symbol = CKeySymbol.Encode(text);
98	Assert.Equal(Encoding.UTF8.GetByteCount(text), symbol.PayloadLength);
99	byte[] frame = Frames.Frame(symbol, out int w, out int h, out int stride);
100	Assert.Equal(text, CKeyDecoder.Decode(frame, w, h, stride)?.Text);
101	}
102	}
103	}