From 9a5d56022a889ef51eef6b32dc5cff061d1b5289 Mon Sep 17 00:00:00 2001
From: Jeremy Powell <jeremy@visionaid.com>
Date: Sun, 17 Nov 2024 22:23:18 +1300
Subject: [PATCH] Add read/write span tests

---
 OpenMcdf.Tests/StreamTests.cs | 44 ++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/OpenMcdf.Tests/StreamTests.cs b/OpenMcdf.Tests/StreamTests.cs
index 8d95404..f4487f6 100644
--- a/OpenMcdf.Tests/StreamTests.cs
+++ b/OpenMcdf.Tests/StreamTests.cs
@@ -150,7 +150,41 @@ public void Seek(Version version, int length)
     [DataRow(Version.V4, 1024 * 4096)] // Multiple FAT sectors (1024 * 4096)
     [DataRow(Version.V4, 7087616 * 4)] // First DIFAT chain
     [DataRow(Version.V4, 2 * 7087616 * 4)] // Long DIFAT chain
-    public void Write(Version version, int length)
+    public void Write(Version version, int length) => WriteCore(version, length, false);
+
+#if (!NETSTANDARD2_0 && !NETFRAMEWORK)
+    [TestMethod]
+    [DataRow(Version.V3, 0)]
+    [DataRow(Version.V3, 63)]
+    [DataRow(Version.V3, 64)] // Mini-stream sector size
+    [DataRow(Version.V3, 65)]
+    [DataRow(Version.V3, 511)]
+    [DataRow(Version.V3, 512)] // Multiple stream sectors
+    [DataRow(Version.V3, 513)]
+    [DataRow(Version.V3, 4095)]
+    [DataRow(Version.V3, 4096)]
+    [DataRow(Version.V3, 4097)]
+    [DataRow(Version.V3, 128 * 512)] // Multiple FAT sectors
+    [DataRow(Version.V3, 1024 * 4096)] // Multiple FAT sectors
+    [DataRow(Version.V3, 7087616)] // First DIFAT chain
+    [DataRow(Version.V3, 2 * 7087616)] // Long DIFAT chain
+    [DataRow(Version.V4, 0)]
+    [DataRow(Version.V4, 63)]
+    [DataRow(Version.V4, 64)] // Mini-stream sector size
+    [DataRow(Version.V4, 65)]
+    [DataRow(Version.V4, 511)]
+    [DataRow(Version.V4, 512)]
+    [DataRow(Version.V4, 513)]
+    [DataRow(Version.V4, 4095)]
+    [DataRow(Version.V4, 4096)] // Multiple stream sectors
+    [DataRow(Version.V4, 4097)]
+    [DataRow(Version.V4, 1024 * 4096)] // Multiple FAT sectors (1024 * 4096)
+    [DataRow(Version.V4, 7087616 * 4)] // First DIFAT chain
+    [DataRow(Version.V4, 2 * 7087616 * 4)] // Long DIFAT chain
+    public void WriteSpan(Version version, int length) => WriteCore(version, length, true);
+#endif
+
+    static void WriteCore(Version version, int length, bool preferSpan)
     {
         using MemoryStream memoryStream = new();
         using var rootStorage = RootStorage.Create(memoryStream, version);
@@ -162,7 +196,15 @@ public void Write(Version version, int length)
         for (int i = 0; i < length; i++)
             expectedBuffer[i] = (byte)i;
 
+#if (!NETSTANDARD2_0 && !NETFRAMEWORK)
+        if (preferSpan)
+            stream.Write(expectedBuffer);
+        else
+            stream.Write(expectedBuffer, 0, expectedBuffer.Length);
+#else
         stream.Write(expectedBuffer, 0, expectedBuffer.Length);
+#endif
+
         Assert.AreEqual(length, stream.Length);
         Assert.AreEqual(length, stream.Position);