/// <summary>
/// Asserts that two strings are equal, and prints a diff between the two if they are not.
/// </summary>
/// <param name="verifier">The verifier instance.</param>
/// <param name="expected">The expected string. This is presented as the "baseline/before" side in the diff.</param>
/// <param name="actual">The actual string. This is presented as the changed or "after" side in the diff.</param>
/// <param name="message">The message to precede the diff, if the values are not equal.</param>
public static void EqualOrDiff(this IVerifier verifier, string expected, string actual, string?message = null)
{
Requires.NotNull(verifier, nameof(verifier));
if (expected != actual)
{
var diff = s_diffBuilder.BuildDiffModel(expected, actual, ignoreWhitespace: false, ignoreCase: false, s_lineChunker);
var messageBuilder = new StringBuilder();
messageBuilder.AppendLine(
string.IsNullOrEmpty(message)
? "Actual and expected values differ. Expected shown in baseline of diff:"
: message);
if (!diff.Lines.Any(line => line.Type == ChangeType.Inserted || line.Type == ChangeType.Deleted))
{
// We have a failure only caused by line ending differences; recalculate with line endings visible
diff = s_diffBuilder.BuildDiffModel(expected, actual, ignoreWhitespace: false, ignoreCase: false, s_lineEndingsPreservingChunker);
}
foreach (var line in diff.Lines)
{
switch (line.Type)
{
case ChangeType.Inserted:
messageBuilder.Append("+");
break;
case ChangeType.Deleted:
messageBuilder.Append("-");
break;
default:
messageBuilder.Append(" ");
break;
}
messageBuilder.AppendLine(line.Text.Replace("\r", "<CR>").Replace("\n", "<LF>"));
}
verifier.Fail(messageBuilder.ToString());
}
}
/// <summary>
/// Asserts that two strings are equal, and prints a diff between the two if they are not.
/// </summary>
/// <param name="verifier">The verifier instance.</param>
/// <param name="expected">The expected string. This is presented as the "baseline/before" side in the diff.</param>
/// <param name="actual">The actual string. This is presented as the changed or "after" side in the diff.</param>
/// <param name="message">The message to precede the diff, if the values are not equal.</param>
public static void EqualOrDiff(this IVerifier verifier, string expected, string actual, string?message = null)
{
Requires.NotNull(verifier, nameof(verifier));
if (expected != actual)
{
var diffBuilder = new InlineDiffBuilder(new Differ());
var diff = diffBuilder.BuildDiffModel(expected, actual, ignoreWhitespace: false);
var messageBuilder = new StringBuilder();
messageBuilder.AppendLine(
string.IsNullOrEmpty(message)
? "Actual and expected values differ. Expected shown in baseline of diff:"
: message);
foreach (var line in diff.Lines)
{
switch (line.Type)
{
case ChangeType.Inserted:
messageBuilder.Append("+");
break;
case ChangeType.Deleted:
messageBuilder.Append("-");
break;
default:
messageBuilder.Append(" ");
break;
}
messageBuilder.AppendLine(line.Text);
}
verifier.Fail(messageBuilder.ToString());
}
}