public void Will_return_empty_modifications_for_empty_strings()
{
var differ = new TestableDiffer();
var a = new ModificationData("");
var b = new ModificationData("");
a.HashedPieces = new int[0];
b.HashedPieces = new int[0];
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
Assert.Empty(a.Modifications);
Assert.Empty(b.Modifications);
}
public void Will_return_correct_modifications_count_for_random_data(int[] aLines, int[] bLines, int editLength)
{
var differ = new TestableDiffer();
var a = new ModificationData("");
var b = new ModificationData("");
a.HashedPieces = aLines;
b.HashedPieces = bLines;
a.Modifications = new bool[aLines.Length];
b.Modifications = new bool[bLines.Length];
differ.TestBuildModificationData(a, b);
int modCount = a.Modifications.Count(x => x == true) + b.Modifications.Count(x => x == true);
Assert.Equal(editLength, modCount);
}
public void Will_return_all_modifications_for_non_empty_vs_empty_string()
{
var differ = new TestableDiffer();
var a = new ModificationData("cat\nhat\npat\nmatt");
var b = new ModificationData("");
a.HashedPieces = new[] { 1, 2, 3, 4 };
b.HashedPieces = new int[] { };
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
foreach (var mod in a.Modifications)
{
Assert.True(mod);
}
}
public void Will_return_correct_modifications_for_strings_with_two_differences()
{
var differ = new TestableDiffer();
var a = new ModificationData("cat\nfat\ntac");
var b = new ModificationData("cat\nmatt\ntac");
a.HashedPieces = new[] { 1, 2, 3 };
b.HashedPieces = new[] { 1, 4, 3 };
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
Assert.False(a.Modifications[0]);
Assert.True(a.Modifications[1]);
Assert.False(a.Modifications[2]);
Assert.False(b.Modifications[0]);
Assert.True(b.Modifications[1]);
Assert.False(b.Modifications[2]);
}
public void Will_return_correct_modifications_two_partially_similar_strings()
{
var differ = new TestableDiffer();
var a = new ModificationData("cat\nhat\npat\nmatt");
var b = new ModificationData("cat\nmatt\ntac");
a.HashedPieces = new[] { 1, 2, 3, 4 };
b.HashedPieces = new[] { 1, 4, 5 };
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
Assert.False(a.Modifications[0]);
Assert.True(a.Modifications[1]);
Assert.True(a.Modifications[2]);
Assert.False(a.Modifications[3]);
Assert.False(b.Modifications[0]);
Assert.False(b.Modifications[1]);
Assert.True(b.Modifications[2]);
}
public void Will_return_all_modifications_for_unique_strings()
{
var differ = new TestableDiffer();
var a = new ModificationData("cat\nhat\npat\nmatt");
var b = new ModificationData("door\nfloor\nbore\nmore");
a.HashedPieces = new[] { 1, 2, 3, 4 };
b.HashedPieces = new[] { 5, 6, 7, 8 };
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
foreach (var mod in a.Modifications)
{
Assert.True(mod);
}
foreach (var mod in b.Modifications)
{
Assert.True(mod);
}
}
public void Will_return_no_modifications_for_same_strings()
{
var differ = new TestableDiffer();
var a = new ModificationData("cat\nhat\npat\nmatt");
var b = new ModificationData("cat\nhat\npat\nmatt");
a.HashedPieces = new[] { 1, 2, 3, 4 };
b.HashedPieces = new[] { 1, 2, 3, 4 };
a.Modifications = new bool[a.HashedPieces.Length];
b.Modifications = new bool[b.HashedPieces.Length];
differ.TestBuildModificationData(a, b);
foreach (var mod in a.Modifications)
{
Assert.False(mod);
}
foreach (var mod in b.Modifications)
{
Assert.False(mod);
}
}