From a05a59a9daed13eb414f9afa8ae6ef2245cb80ad Mon Sep 17 00:00:00 2001
From: Folker Kinzel <fkinzel@freenet.de>
Date: Tue, 28 Jan 2025 15:41:56 +0100
Subject: [PATCH] tests

---
 .../CsvRecordTests.cs                         | 32 ++++++++++++++++++
 src/FolkerKinzel.CsvTools.Tests/CsvTests.cs   | 33 +++++++++++--------
 src/FolkerKinzel.CsvTools/CsvRecord.cs        |  2 +-
 3 files changed, 53 insertions(+), 14 deletions(-)

diff --git a/src/FolkerKinzel.CsvTools.Tests/CsvRecordTests.cs b/src/FolkerKinzel.CsvTools.Tests/CsvRecordTests.cs
index f3c9a43..f9c7ca9 100644
--- a/src/FolkerKinzel.CsvTools.Tests/CsvRecordTests.cs
+++ b/src/FolkerKinzel.CsvTools.Tests/CsvRecordTests.cs
@@ -4,6 +4,7 @@
 using System.Linq;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System.Collections.Generic;
+using System.Collections;
 
 namespace FolkerKinzel.CsvTools.Tests;
 
@@ -150,6 +151,15 @@ public void GetEnumeratorTest1()
         Assert.AreEqual(3, rec.Select(x => int.Parse(x.Value!.ToString(), CultureInfo.InvariantCulture)).Sum());
     }
 
+    [TestMethod]
+    public void GetEnumeratorTest2()
+    {
+        var record = new CsvRecord(1);
+        IEnumerator enumerator = ((IEnumerable)record).GetEnumerator();
+        IEnumerator<KeyValuePair<string, ReadOnlyMemory<char>>> enumerator2 = record.GetEnumerator();
+        Assert.AreEqual(enumerator2.GetType(), enumerator.GetType());
+    }
+
     [TestMethod()]
     public void ToStringTest()
     {
@@ -223,4 +233,26 @@ public void IndexOfColumnTest()
         Assert.AreEqual(-1, rec.IndexOfColumn("bla"));
         Assert.AreEqual(-1, rec.IndexOfColumn(null));
     }
+
+    [TestMethod]
+    public void IsEmptyTest1()
+    {
+        var record = new CsvRecord(0);
+        Assert.IsTrue(record.IsEmpty);
+        Assert.IsNotNull(record.ToString());    
+    }
+
+    [TestMethod]
+    public void IsEmptyTest2()
+    {
+        var record = new CsvRecord(1);
+        Assert.IsTrue(record.IsEmpty);
+        Assert.IsNotNull(record.ToString());
+
+        record.Values[0] = "1".AsMemory();
+        Assert.IsFalse(record.IsEmpty);
+        Assert.IsNotNull(record.ToString());
+    }
+
+    
 }
\ No newline at end of file
diff --git a/src/FolkerKinzel.CsvTools.Tests/CsvTests.cs b/src/FolkerKinzel.CsvTools.Tests/CsvTests.cs
index 0fbde5e..6738b6c 100644
--- a/src/FolkerKinzel.CsvTools.Tests/CsvTests.cs
+++ b/src/FolkerKinzel.CsvTools.Tests/CsvTests.cs
@@ -114,27 +114,20 @@ public void OpenReadTest4(char delimiter)
     [DataRow('#')]
     [DataRow('\t')]
     [DataRow(' ')]
-    public void OpenReadTest5(char delimiter)
-    {
-        _ = Csv.Parse("Hi", delimiter: delimiter);
-    }
+    public void OpenReadTest5(char delimiter) => _ = Csv.Parse("Hi", delimiter: delimiter);
 
     [DataTestMethod]
     [DataRow('\"')]
     [DataRow('\r')]
     [DataRow('\n')]
     [ExpectedException(typeof(ArgumentOutOfRangeException))]
-    public void OpenReadTest6(char delimiter)
-    {
-        _ = Csv.Parse("Hi", delimiter: delimiter);
-    }
-
+    public void OpenReadTest6(char delimiter) => _ = Csv.Parse("Hi", delimiter: delimiter);
 
     [TestMethod]
     public void OpenWriteTest1()
     {
         string fileName = Path.Combine(TestContext.TestRunResultsDirectory!, "OpenWriteTest1.csv");
-        using var writer = Csv.OpenWrite(fileName, 2);
+        using CsvWriter writer = Csv.OpenWrite(fileName, 2);
         Assert.AreEqual(',', writer.Delimiter);
     }
 
@@ -142,7 +135,7 @@ public void OpenWriteTest1()
     public void OpenWriteTest2()
     {
         string fileName = Path.Combine(TestContext.TestRunResultsDirectory!, "OpenWriteTest1.csv");
-        using var writer = Csv.OpenWrite(fileName, []);
+        using CsvWriter writer = Csv.OpenWrite(fileName, []);
         Assert.AreEqual(',', writer.Delimiter);
     }
 
@@ -150,7 +143,7 @@ public void OpenWriteTest2()
     public void OpenWriteTest3()
     {
         using var stringWriter = new StringWriter();
-        using var writer = Csv.OpenWrite(stringWriter, []);
+        using CsvWriter writer = Csv.OpenWrite(stringWriter, []);
         Assert.AreEqual(',', writer.Delimiter);
     }
 
@@ -158,7 +151,21 @@ public void OpenWriteTest3()
     public void OpenWriteTest4()
     {
         using var stringWriter = new StringWriter();
-        using var writer = Csv.OpenWrite(stringWriter, 2);
+        using CsvWriter writer = Csv.OpenWrite(stringWriter, 2);
         Assert.AreEqual(',', writer.Delimiter);
     }
+
+    [TestMethod]
+    public void ParseTest1()
+    {
+        CsvRecord[] result = Csv.Parse("""
+            A,A,A
+            1,2,3
+            """);
+
+        Assert.AreEqual(1, result.Length);
+        Assert.AreEqual("A", result[0].ColumnNames[0]);
+        Assert.AreEqual("A2", result[0].ColumnNames[1]);
+        Assert.AreEqual("A3", result[0].ColumnNames[2]);
+    }
 }
diff --git a/src/FolkerKinzel.CsvTools/CsvRecord.cs b/src/FolkerKinzel.CsvTools/CsvRecord.cs
index 2043c21..28bee62 100644
--- a/src/FolkerKinzel.CsvTools/CsvRecord.cs
+++ b/src/FolkerKinzel.CsvTools/CsvRecord.cs
@@ -289,7 +289,7 @@ public override string ToString()
     {
         if (this.Count == 0)
         {
-            return base.ToString() ?? string.Empty;
+            return "<Empty>";
         }
 
         var sb = new StringBuilder();