Initial implementation of IFormattable

UnitsNet.Tests/QuantityIFormattableTests.cs

@@ -0,0 +1,69 @@
+using System;
+using UnitsNet.Units;
+using Xunit;
+
+namespace UnitsNet.Tests
+{
+    public class QuantityIFormattableTests
+    {
+        private static Length length = Length.FromFeet(1.2345678);
+
+        [Fact]
+        public void GFormatStringEqualsToString()
+        {
+            Assert.Equal(length.ToString("g"), length.ToString());
+        }
+
+        [Fact]
+        public void EmptyOrNullFormatStringEqualsGFormat()
+        {
+            Assert.Equal(length.ToString("g"), length.ToString(string.Empty));
+            Assert.Equal(length.ToString("g"), length.ToString((string)null));
+        }
+
+        [Fact]
+        public void AFormatGetsAbbreviations()
+        {
+            Assert.Equal(UnitAbbreviationsCache.Default.GetDefaultAbbreviation(length.Unit), length.ToString("a"));
+            Assert.Equal(UnitAbbreviationsCache.Default.GetDefaultAbbreviation(length.Unit), length.ToString("a0"));
+
+            Assert.Equal(UnitAbbreviationsCache.Default.GetUnitAbbreviations(length.Unit)[1], length.ToString("a1"));
+            Assert.Equal(UnitAbbreviationsCache.Default.GetUnitAbbreviations(length.Unit)[2], length.ToString("a2"));
+        }
+
+        [Fact]
+        public void VFormatEqualsValueToString()
+        {
+            Assert.Equal(length.Value.ToString(), length.ToString("v"));
+        }
+
+        [Fact]
+        public void QFormatEqualsQuantityName()
+        {
+            Assert.Equal(Length.Info.Name, length.ToString("q"));
+        }
+
+        [Fact]
+        public void SFormatEqualsSignificantDigits()
+        {
+            Assert.Equal(length.ToString(null, 0), length.ToString("s"));
+            Assert.Equal(length.ToString(null, 1), length.ToString("s1"));
+            Assert.Equal(length.ToString(null, 2), length.ToString("s2"));
+            Assert.Equal(length.ToString(null, 3), length.ToString("s3"));
+            Assert.Equal(length.ToString(null, 4), length.ToString("s4"));
+            Assert.Equal(length.ToString(null, 5), length.ToString("s5"));
+        }
+
+        [Fact]
+        public void UFormatEqualsUnitToString()
+        {
+            Assert.Equal(length.Unit.ToString(), length.ToString("u"));
+        }
+
+        [Fact]
+        public void UnsupportedFormatStringThrowsException()
+        {
+            Assert.Throws<FormatException>(() => length.ToString("z"));
+        }
+    }
+}

UnitsNet.Tests/QuantityTests.ToString.cs

@@ -1,6 +1,7 @@
 // Licensed under MIT No Attribution, see LICENSE file at the root.
 // Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
 
+using System;
 using System.Globalization;
 using UnitsNet.Units;
 using Xunit;
@@ -106,7 +107,7 @@ public void FormatsNumberUsingGivenCulture()
                 try
                 {
                     GlobalConfiguration.DefaultCulture = CultureInfo.InvariantCulture;
-                    Assert.Equal("0.05 m", Length.FromCentimeters(5).ToUnit(LengthUnit.Meter).ToString(null));
+                    Assert.Equal("0.05 m", Length.FromCentimeters(5).ToUnit(LengthUnit.Meter).ToString((IFormatProvider)null));
                     Assert.Equal("0.05 m", Length.FromCentimeters(5).ToUnit(LengthUnit.Meter).ToString(CultureInfo.InvariantCulture));
                     Assert.Equal("0,05 m", Length.FromCentimeters(5).ToUnit(LengthUnit.Meter).ToString(new CultureInfo("nb-NO")));
                 }