Add non-formatting tests for TLV

Author: mnadareski

SabreTools.ASN1.Test/TypeLengthValueTests.cs

@@ -0,0 +1,115 @@
+using System;
+using System.IO;
+using Xunit;
+
+namespace SabreTools.ASN1.Test
+{
+    public class TypeLengthValueTests
+    {
+        [Fact]
+        public void Constructor_EmptyArray_Throws()
+        {
+            int index = 0;
+            byte[] data = [];
+            Assert.Throws<InvalidDataException>(() => new TypeLengthValue(data, ref index));
+        }
+
+        [Fact]
+        public void Constructor_ValidArrayNegativeIndex_Throws()
+        {
+            int index = -1;
+            byte[] data = [0x00];
+            Assert.Throws<IndexOutOfRangeException>(() => new TypeLengthValue(data, ref index));
+        }
+
+        [Fact]
+        public void Constructor_ValidArrayOverIndex_Throws()
+        {
+            int index = 10;
+            byte[] data = [0x00];
+            Assert.Throws<IndexOutOfRangeException>(() => new TypeLengthValue(data, ref index));
+        }
+
+        [Fact]
+        public void Constructor_ValidMinimalArray_Returns()
+        {
+            int index = 0;
+            byte[] data = [0x00];
+            var tlv = new TypeLengthValue(data, ref index);
+
+            Assert.Equal(ASN1Type.V_ASN1_EOC, tlv.Type);
+            Assert.Equal(default, tlv.Length);
+            Assert.Null(tlv.Value);
+        }
+
+        [Fact]
+        public void Constructor_EmptyStream_Throws()
+        {
+            Stream data = new MemoryStream([], 0, 0, false, false);
+            Assert.Throws<InvalidDataException>(() => new TypeLengthValue(data));
+        }
+
+        [Fact]
+        public void Constructor_ValidMinimalStream_Returns()
+        {
+            Stream data = new MemoryStream([0x00]);
+            var tlv = new TypeLengthValue(data);
+
+            Assert.Equal(ASN1Type.V_ASN1_EOC, tlv.Type);
+            Assert.Equal(default, tlv.Length);
+            Assert.Null(tlv.Value);
+        }
+
+        [Fact]
+        public void Constructor_ValidBoolean_Returns()
+        {
+            Stream data = new MemoryStream([0x01, 0x01, 0x01]);
+            var tlv = new TypeLengthValue(data);
+
+            Assert.Equal(ASN1Type.V_ASN1_BOOLEAN, tlv.Type);
+            Assert.Equal(1UL, tlv.Length);
+            Assert.NotNull(tlv.Value);
+
+            byte[]? valueAsArray = tlv.Value as byte[];
+            Assert.NotNull(valueAsArray);
+            byte actual = Assert.Single(valueAsArray);
+            Assert.Equal(0x01, actual);
+        }
+
+        [Theory]
+        [InlineData(new byte[] { 0x26, 0x81, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x82, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x83, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x84, 0x00, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x85, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        [InlineData(new byte[] { 0x26, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0x01, 0x01 })]
+        public void Constructor_ComplexValue_Returns(byte[] arr)
+        {
+            Stream data = new MemoryStream(arr);
+            var tlv = new TypeLengthValue(data);
+
+            Assert.Equal(ASN1Type.V_ASN1_CONSTRUCTED | ASN1Type.V_ASN1_OBJECT, tlv.Type);
+            Assert.Equal(3UL, tlv.Length);
+            Assert.NotNull(tlv.Value);
+
+            TypeLengthValue[]? valueAsArray = tlv.Value as TypeLengthValue[];
+            Assert.NotNull(valueAsArray);
+            TypeLengthValue actual = Assert.Single(valueAsArray);
+
+            Assert.Equal(ASN1Type.V_ASN1_BOOLEAN, actual.Type);
+            Assert.Equal(1UL, actual.Length);
+            Assert.NotNull(actual.Value);
+        }
+
+        [Theory]
+        [InlineData(new byte[] { 0x26, 0x80 })]
+        [InlineData(new byte[] { 0x26, 0x89 })]
+        public void Constructor_ComplexValueInvalidLength_Throws(byte[] arr)
+        {
+            Stream data = new MemoryStream(arr);
+            Assert.Throws<InvalidOperationException>(() => new TypeLengthValue(data));
+        }
+    }
+}