From d2a82cc92ac76ea27eb0ce5ae487736b26de8b8d Mon Sep 17 00:00:00 2001
From: Mikel Blanchard <mblanchard@macrosssoftware.com>
Date: Tue, 21 May 2024 16:35:48 -0700
Subject: [PATCH 1/3] Expose the ctor on Batch<T> which accepts a single item.

---
 .../.publicApi/Stable/PublicAPI.Unshipped.txt             | 1 +
 src/OpenTelemetry/Batch.cs                                | 8 ++++++--
 src/OpenTelemetry/CHANGELOG.md                            | 4 ++++
 test/OpenTelemetry.Tests/Trace/BatchTest.cs               | 2 ++
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/OpenTelemetry/.publicApi/Stable/PublicAPI.Unshipped.txt b/src/OpenTelemetry/.publicApi/Stable/PublicAPI.Unshipped.txt
index a9a6c031d7a..3ad610b842e 100644
--- a/src/OpenTelemetry/.publicApi/Stable/PublicAPI.Unshipped.txt
+++ b/src/OpenTelemetry/.publicApi/Stable/PublicAPI.Unshipped.txt
@@ -1,3 +1,4 @@
+OpenTelemetry.Batch<T>.Batch(T! item) -> void
 OpenTelemetry.Metrics.Exemplar
 OpenTelemetry.Metrics.Exemplar.DoubleValue.get -> double
 OpenTelemetry.Metrics.Exemplar.Exemplar() -> void
diff --git a/src/OpenTelemetry/Batch.cs b/src/OpenTelemetry/Batch.cs
index b4ddd08cf17..033b6ebb35b 100644
--- a/src/OpenTelemetry/Batch.cs
+++ b/src/OpenTelemetry/Batch.cs
@@ -35,9 +35,13 @@ public Batch(T[] items, int count)
         this.Count = this.targetCount = count;
     }
 
-    internal Batch(T item)
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Batch{T}"/> struct.
+    /// </summary>
+    /// <param name="item">The item to store in the batch.</param>
+    public Batch(T item)
     {
-        Debug.Assert(item != null, $"{nameof(item)} was null.");
+        Guard.ThrowIfNull(item);
 
         this.item = item;
         this.Count = this.targetCount = 1;
diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index 763f3f370a0..7ef3fcd75cf 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+* Exposed a `public` constructor on `Batch<T>` which accepts a single instance
+  of `T` to be contained in the batch.
+  ([#XXXX](https://github.com/open-telemetry/opentelemetry-dotnet/pull/XXXX))
+
 ## 1.9.0-alpha.1
 
 Released 2024-May-20
diff --git a/test/OpenTelemetry.Tests/Trace/BatchTest.cs b/test/OpenTelemetry.Tests/Trace/BatchTest.cs
index b1d5b170d52..d64c697492f 100644
--- a/test/OpenTelemetry.Tests/Trace/BatchTest.cs
+++ b/test/OpenTelemetry.Tests/Trace/BatchTest.cs
@@ -14,6 +14,8 @@ public void CheckConstructorExceptions()
         Assert.Throws<ArgumentNullException>(() => new Batch<string>((string[])null, 0));
         Assert.Throws<ArgumentOutOfRangeException>(() => new Batch<string>(Array.Empty<string>(), -1));
         Assert.Throws<ArgumentOutOfRangeException>(() => new Batch<string>(Array.Empty<string>(), 1));
+
+        Assert.Throws<ArgumentNullException>(() => new Batch<string>(null));
     }
 
     [Fact]

From 3383360cc9446480495ffa3dd634df8616da5b54 Mon Sep 17 00:00:00 2001
From: Mikel Blanchard <mblanchard@macrosssoftware.com>
Date: Tue, 21 May 2024 16:38:03 -0700
Subject: [PATCH 2/3] CHANGELOG patch.

---
 src/OpenTelemetry/CHANGELOG.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index 7ef3fcd75cf..e34a00b7ede 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 * Exposed a `public` constructor on `Batch<T>` which accepts a single instance
   of `T` to be contained in the batch.
-  ([#XXXX](https://github.com/open-telemetry/opentelemetry-dotnet/pull/XXXX))
+  ([#5642](https://github.com/open-telemetry/opentelemetry-dotnet/pull/5642))
 
 ## 1.9.0-alpha.1
 

From 8c02916b9847cdf121640b75914c43f4b5c28b66 Mon Sep 17 00:00:00 2001
From: Mikel Blanchard <mblanchard@macrosssoftware.com>
Date: Fri, 1 Nov 2024 13:07:57 -0700
Subject: [PATCH 3/3] Test fix.

---
 test/OpenTelemetry.Tests/Trace/BatchTest.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/OpenTelemetry.Tests/Trace/BatchTest.cs b/test/OpenTelemetry.Tests/Trace/BatchTest.cs
index c5445a3bacd..6f0a31842f3 100644
--- a/test/OpenTelemetry.Tests/Trace/BatchTest.cs
+++ b/test/OpenTelemetry.Tests/Trace/BatchTest.cs
@@ -15,7 +15,7 @@ public void CheckConstructorExceptions()
         Assert.Throws<ArgumentOutOfRangeException>(() => new Batch<string>(Array.Empty<string>(), -1));
         Assert.Throws<ArgumentOutOfRangeException>(() => new Batch<string>(Array.Empty<string>(), 1));
 
-        Assert.Throws<ArgumentNullException>(() => new Batch<string>(null));
+        Assert.Throws<ArgumentNullException>(() => new Batch<string>(null!));
     }
 
     [Fact]