polyline decoder extesnsion tests

Author: petesramek

src/PolylineAlgorithm/Extensions/PolylineDecoderExtensions.cs

@@ -58,4 +58,12 @@ public static IEnumerable<Coordinate> Decode(this IPolylineDecoder<Polyline, Coo
 
         return decoder.Decode(Polyline.FromCharArray(polyline));
     }
+
+    public static IEnumerable<Coordinate> Decode(this IPolylineDecoder<Polyline, Coordinate> decoder, ReadOnlyMemory<char> polyline) {
+        if (decoder is null) {
+            throw new ArgumentNullException(nameof(decoder));
+        }
+
+        return decoder.Decode(Polyline.FromMemory(polyline));
+    }
 }

tests/PolylineAlgorithm.Tests/PolylineDecoderExtensionsTest.cs

@@ -0,0 +1,62 @@
+namespace PolylineAlgorithm.Tests;
+
+using PolylineAlgorithm.Extensions;
+using PolylineAlgorithm.Utility;
+using System.Collections.Generic;
+using System.Linq;
+
+[TestClass]
+public class PolylineDecoderExtensionsTest {
+    private readonly PolylineDecoder decoder = new PolylineDecoder();
+
+    public static IEnumerable<object[]> CoordinateCount => [[1], [10], [100], [1_000]];
+
+    [TestMethod]
+    [DynamicData(nameof(CoordinateCount), DynamicDataSourceType.Property)]
+    public void Decode_String_Returns_Expected_Coordinates(int count) {
+        // Arrange
+        var polyline = RandomValueProvider.GetPolyline(count);
+        var expected = RandomValueProvider.GetCoordinates(count)
+            .Select(c => new Coordinate(c.Latitude, c.Longitude))
+            .ToList();
+
+        // Act
+        var result = PolylineDecoderExtensions.Decode(decoder, polyline).ToList();
+
+        // Assert
+        CollectionAssert.AreEqual(expected, result);
+    }
+
+    [TestMethod]
+    [DynamicData(nameof(CoordinateCount), DynamicDataSourceType.Property)]
+    public void Decode_CharArray_Returns_Expected_Coordinates(int count) {
+        // Arrange
+        var polyline = RandomValueProvider.GetPolyline(count).ToCharArray();
+        var expected = RandomValueProvider.GetCoordinates(count)
+            .Select(c => new Coordinate(c.Latitude, c.Longitude))
+            .ToList();
+
+        // Act
+        var result = PolylineDecoderExtensions.Decode(decoder, polyline).ToList();
+
+        // Assert
+        CollectionAssert.AreEqual(expected, result);
+    }
+
+    [TestMethod]
+    [DynamicData(nameof(CoordinateCount), DynamicDataSourceType.Property)]
+    public void Decode_Memory_Returns_Expected_Coordinates(int count) {
+        // Arrange
+        var polyline = RandomValueProvider.GetPolyline(count).AsMemory();
+        var expected = RandomValueProvider.GetCoordinates(count)
+            .Select(c => new Coordinate(c.Latitude, c.Longitude))
+            .ToList();
+
+        // Act
+        var result = PolylineDecoderExtensions.Decode(decoder, polyline).ToList();
+
+        // Assert
+        CollectionAssert.AreEqual(expected, result);
+    }
+
+}