Implement FromHeadingArrow

Humanizr · Aug 17, 2021 · 295b731 · 295b731
1 parent b13a0a4
commit 295b731
Show file tree

Hide file tree

Showing 3 changed files with 67 additions and 0 deletions.
diff --git a/src/Humanizer.Tests.Shared/HeadingTests.cs b/src/Humanizer.Tests.Shared/HeadingTests.cs
@@ -158,5 +158,36 @@ public void ToHeadingArrow(double heading, char expected)
         {
             Assert.Equal(expected, heading.ToHeadingArrow());
         }
+
+        [InlineData('↑', 0)]
+        [InlineData('↗', 45)]
+        [InlineData('→', 90)]
+        [InlineData('↘', 135)]
+        [InlineData('↓', 180)]
+        [InlineData('↙', 225)]
+        [InlineData('←', 270)]
+        [InlineData('↖', 315)]
+        [InlineData('\n', -1)]
+        [Theory]
+        public void FromHeadingArrow(char heading, double expected)
+        {
+            Assert.Equal(expected, heading.FromHeadingArrow());
+        }
+
+        [InlineData("↑", 0)]
+        [InlineData("↗", 45)]
+        [InlineData("→", 90)]
+        [InlineData("↘", 135)]
+        [InlineData("↓", 180)]
+        [InlineData("↙", 225)]
+        [InlineData("←", 270)]
+        [InlineData("↖", 315)]
+        [InlineData("", -1)]
+        [InlineData("xyz", -1)]
+        [Theory]
+        public void FromHeadingArrow_Also_Works_With_Strings(string heading, double expected)
+        {
+            Assert.Equal(expected, heading.FromHeadingArrow());
+        }
     }
 }
diff --git a/src/Humanizer.Tests/ApiApprover/PublicApiApprovalTest.approve_public_api.approved.txt b/src/Humanizer.Tests/ApiApprover/PublicApiApprovalTest.approve_public_api.approved.txt
@@ -127,6 +127,8 @@ namespace Humanizer
     public class static HeadingExtensions
     {
         public static double FromAbbreviatedHeading(this string heading, System.Globalization.CultureInfo culture = null) { }
+        public static double FromHeadingArrow(this char heading) { }
+        public static double FromHeadingArrow(this string heading) { }
         public static string ToHeading(this double heading, Humanizer.HeadingStyle style = 0, System.Globalization.CultureInfo culture = null) { }
         public static char ToHeadingArrow(this double heading) { }
     }

diff --git a/src/Humanizer/HeadingExtensions.cs b/src/Humanizer/HeadingExtensions.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Globalization;
+
 using Humanizer.Localisation;
 
 namespace Humanizer
@@ -93,5 +94,38 @@ public static double FromAbbreviatedHeading(this string heading, CultureInfo cul
 
             return -1;
         }
+
+        /// <summary>
+        /// Returns a heading based on the heading arrow.
+        /// </summary>
+        public static double FromHeadingArrow(this char heading)
+        {
+            var index = Array.IndexOf(headingArrows, heading);
+
+            if (index == -1)
+            {
+                return -1;
+            }
+
+            return (index * 45.0);
+        }
+
+        /// <summary>
+        /// Returns a heading based on the heading arrow.
+        /// </summary>
+        public static double FromHeadingArrow(this string heading)
+        {
+            if (heading == null)
+            {
+                throw new ArgumentNullException(nameof(heading));
+            }
+
+            if (heading.Length != 1)
+            {
+                return -1;
+            }
+
+            return heading[0].FromHeadingArrow();
+        }
     }
 }