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More test cases for human readable bytes

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This commit is contained in:
Mark McDowall 2014-12-15 13:08:22 -08:00
parent e715275657
commit c10f02e0b1
2 changed files with 11 additions and 7 deletions
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4
src/NzbDrone.Common.Test/ExtensionTests/Int64ExtensionFixture.cs
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@ -7,10 +7,14 @@ namespace NzbDrone.Common.Test.ExtensionTests
[TestFixture] [TestFixture]
public class Int64ExtensionFixture public class Int64ExtensionFixture
{ {
[TestCase(0, "0 B")]
[TestCase(1000, "1.0 KB")] [TestCase(1000, "1.0 KB")]
[TestCase(1000000, "1.0 MB")] [TestCase(1000000, "1.0 MB")]
[TestCase(377487360, "377.5 MB")] [TestCase(377487360, "377.5 MB")]
[TestCase(1255864686, "1.3 GB")] [TestCase(1255864686, "1.3 GB")]
[TestCase(-1000000, "-1.0 MB")]
[TestCase(-377487360, "-377.5 MB")]
[TestCase(-1255864686, "-1.3 GB")]
public void should_calculate_string_correctly(long bytes, string expected) public void should_calculate_string_correctly(long bytes, string expected)
{ {
bytes.SizeSuffix().Should().Be(expected); bytes.SizeSuffix().Should().Be(expected);

12
src/NzbDrone.Common/Extensions/Int64Extensions.cs
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@ -4,17 +4,17 @@ namespace NzbDrone.Common.Extensions
{ {
public static class Int64Extensions public static class Int64Extensions
{ {
private static readonly string[] SizeSuffixes = { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" }; private static readonly string[] SizeSuffixes = { "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
public static string SizeSuffix(this Int64 value) public static string SizeSuffix(this Int64 bytes)
{ {
const int bytesInKb = 1000; const int bytesInKb = 1000;
if (value < 0) return "-" + SizeSuffix(-value); if (bytes < 0) return "-" + SizeSuffix(-bytes);
if (value == 0) return "0 bytes"; if (bytes == 0) return "0 B";
var mag = (int)Math.Log(value, bytesInKb); var mag = (int)Math.Log(bytes, bytesInKb);
var adjustedSize = value / (decimal)Math.Pow(bytesInKb, mag); var adjustedSize = bytes / (decimal)Math.Pow(bytesInKb, mag);
return string.Format("{0:n1} {1}", adjustedSize, SizeSuffixes[mag]); return string.Format("{0:n1} {1}", adjustedSize, SizeSuffixes[mag]);
} }