additional extension tests

Author: petesramek

tests/PolylineAlgorithm.Tests/PolylineEncoderExtensionsTest.cs

@@ -0,0 +1,72 @@
+namespace PolylineAlgorithm.Tests;
+
+using PolylineAlgorithm.Extensions;
+using PolylineAlgorithm.Utility;
+using System.Collections.Generic;
+using System.Linq;
+
+[TestClass]
+public class PolylineEncoderExtensionsTest {
+    private readonly PolylineEncoder Encoder = new PolylineEncoder();
+
+    public static IEnumerable<object[]> CoordinateCount => [[1], [10], [100], [1_000]];
+
+    [TestMethod]
+    public void Encode_Null_Encoder_Empty_List_Throws_ArgumentNullException() {
+        // Arrange
+        void Encode() => PolylineEncoderExtensions.Encode(null!, new List<Coordinate>());
+
+        // Act
+        var exception = Assert.ThrowsExactly<ArgumentNullException>(Encode);
+
+        // Assert
+        Assert.AreEqual("encoder", exception.ParamName);
+        Assert.IsTrue(exception.Message.Contains("Value cannot be null.", StringComparison.Ordinal));
+    }
+
+    [TestMethod]
+    public void Encode_Null_Encoder_Null_CharArray_Throws_ArgumentNullException() {
+        // Arrange
+        void Encode() => PolylineEncoderExtensions.Encode(null!, new Coordinate[0]);
+
+        // Act
+        var exception = Assert.ThrowsExactly<ArgumentNullException>(Encode);
+
+        // Assert
+        Assert.AreEqual("encoder", exception.ParamName);
+        Assert.IsTrue(exception.Message.Contains("Value cannot be null.", StringComparison.Ordinal));
+    }
+
+    [TestMethod]
+    [DynamicData(nameof(CoordinateCount), DynamicDataSourceType.Property)]
+    public void Encode_List_Returns_Expected_Coordinates(int count) {
+        // Arrange
+        var coordinates = RandomValueProvider.GetCoordinates(count)
+            .Select(c => new Coordinate(c.Latitude, c.Longitude))
+            .ToList();
+        var expected = RandomValueProvider.GetPolyline(count);
+
+        // Act
+        var result = PolylineEncoderExtensions.Encode(Encoder, coordinates);
+
+        // Assert
+        Assert.AreEqual(expected, result.ToString());
+    }
+
+    [TestMethod]
+    [DynamicData(nameof(CoordinateCount), DynamicDataSourceType.Property)]
+    public void Encode_Array_Returns_Expected_Coordinates(int count) {
+        // Arrange
+        var coordinates = RandomValueProvider.GetCoordinates(count)
+            .Select(c => new Coordinate(c.Latitude, c.Longitude))
+            .ToArray();
+        var expected = RandomValueProvider.GetPolyline(count);
+
+        // Act
+        var result = PolylineEncoderExtensions.Encode(Encoder, coordinates);
+
+        // Assert
+        Assert.AreEqual(expected, result.ToString());
+    }
+
+}