Allow for zero corpora

sillsdev · Nov 26, 2024 · 4cad944 · 4cad944
1 parent d284a33
commit 4cad944
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/src/SIL.Machine/Corpora/NParallelTextCorpus.cs b/src/SIL.Machine/Corpora/NParallelTextCorpus.cs
@@ -12,8 +12,6 @@ public class NParallelTextCorpus : NParallelTextCorpusBase
         public NParallelTextCorpus(IEnumerable<ITextCorpus> corpora, IComparer<object> rowRefComparer = null)
         {
             Corpora = corpora.ToImmutableArray();
-            if (Corpora.Count < 1)
-                throw new ArgumentException("There must be at least one corpora.", nameof(corpora));
             RowRefComparer = rowRefComparer ?? new DefaultRowRefComparer();
             AllRows = new bool[Corpora.Count]
                 .Select(_ => false)

diff --git a/tests/SIL.Machine.Tests/Corpora/NParallelTextCorpusTests.cs b/tests/SIL.Machine.Tests/Corpora/NParallelTextCorpusTests.cs
@@ -6,6 +6,14 @@ namespace SIL.Machine.Corpora;
 [TestFixture]
 public class NParallelTextCorpusTests
 {
+    [Test]
+    public void GetRows_ZeroCorpora()
+    {
+        var nParallelCorpus = new NParallelTextCorpus([]);
+        NParallelTextRow[] rows = nParallelCorpus.ToArray();
+        Assert.That(rows.Length, Is.EqualTo(0));
+    }
+
     [Test]
     public void GetRows_ThreeCorpora()
     {