diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.Indexer.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.Indexer.cs
index b3eb4b7..75805cb 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.Indexer.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.Indexer.cs
@@ -8,11 +8,15 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayBuilderTest
 {
     [Theory]
+    [InlineData(int.MinValue)]
+    [InlineData(int.MinValue + 1)]
     [InlineData(MinusFifteen)]
     [InlineData(-1)]
     [InlineData(0)]
     [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void Indexer_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var source = new FlatArray<StructType>.Builder();
@@ -43,10 +47,42 @@ public void Indexer_IndexIsInRange_ExpectItemIsFromSourceItemsByIndex(
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
+    [InlineData(int.MinValue, 1, SomeString)]
+    [InlineData(int.MinValue + 1, 1, SomeString)]
+    [InlineData(MinusFifteen, 1, SomeString)]
+    [InlineData(-1, 1, SomeString)]
     [InlineData(1, 1, SomeString)]
-    [InlineData(1, 1, AnotherString, SomeString)]
-    [InlineData(5, 2, EmptyString, TabString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
+    [InlineData(int.MinValue, 1, EmptyString, AnotherString)]
+    [InlineData(int.MinValue + 1, 1, EmptyString, AnotherString)]
+    [InlineData(MinusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(-1, 1, EmptyString, AnotherString)]
+    [InlineData(1, 1, EmptyString, AnotherString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(int.MinValue, 2, EmptyString, SomeString)]
+    [InlineData(int.MinValue + 1, 2, EmptyString, SomeString)]
+    [InlineData(MinusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(-1, 2, EmptyString, SomeString)]
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(int.MinValue, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MinValue + 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(MinusFifteen, 3, LowerSomeString, null, SomeString)]
     [InlineData(-1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void Indexer_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromEnd.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromEnd.cs
index 79631b9..04aca24 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromEnd.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromEnd.cs
@@ -11,6 +11,8 @@ partial class FlatArrayBuilderTest
     [InlineData(0)]
     [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_IndexFromEnd_SourceIsDefault_ExpectIndexOutOfRangeException(int indexFromEnd)
     {
         var fromEnd = Index.FromEnd(indexFromEnd);
@@ -42,12 +44,26 @@ public void IndexerRef_IndexFromEnd_IndexIsInRange_ExpectItemIsFromSourceItemsBy
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
     [InlineData(0, 1, SomeString)]
     [InlineData(2, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
     [InlineData(0, 1, EmptyString, AnotherString)]
     [InlineData(2, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(0, 2, EmptyString, SomeString)]
+    [InlineData(3, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
     [InlineData(0, 3, LowerSomeString, null, SomeString)]
     [InlineData(4, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexFromEnd_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int indexFromEnd, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromStart.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromStart.cs
index 1218429..ace1253 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromStart.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.IndexFromStart.cs
@@ -11,6 +11,8 @@ partial class FlatArrayBuilderTest
     [InlineData(0)]
     [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_IndexFromStart_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var fromStart = Index.FromStart(index);
@@ -45,9 +47,26 @@ public void IndexerRef_IndexFromStart_IndexIsInRange_ExpectItemIsFromSourceItems
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
     [InlineData(1, 1, SomeString)]
-    [InlineData(1, 1, AnotherString, SomeString)]
-    [InlineData(5, 2, EmptyString, TabString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
+    [InlineData(1, 1, EmptyString, AnotherString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexFromStart_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.cs
index ea73e7e..b433a7d 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T.Builder/Builder/Builder.IndexerRef.cs
@@ -8,11 +8,15 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayBuilderTest
 {
     [Theory]
+    [InlineData(int.MinValue)]
+    [InlineData(int.MinValue + 1)]
     [InlineData(MinusFifteen)]
     [InlineData(-1)]
     [InlineData(0)]
     [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var source = new FlatArray<StructType>.Builder();
@@ -43,10 +47,42 @@ public void IndexerRef_IndexIsInRange_ExpectItemIsFromSourceItemsByIndex(
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
+    [InlineData(int.MinValue, 1, SomeString)]
+    [InlineData(int.MinValue + 1, 1, SomeString)]
+    [InlineData(MinusFifteen, 1, SomeString)]
+    [InlineData(-1, 1, SomeString)]
     [InlineData(1, 1, SomeString)]
-    [InlineData(1, 1, AnotherString, SomeString)]
-    [InlineData(5, 2, EmptyString, TabString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
+    [InlineData(int.MinValue, 1, EmptyString, AnotherString)]
+    [InlineData(int.MinValue + 1, 1, EmptyString, AnotherString)]
+    [InlineData(MinusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(-1, 1, EmptyString, AnotherString)]
+    [InlineData(1, 1, EmptyString, AnotherString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(int.MinValue, 2, EmptyString, SomeString)]
+    [InlineData(int.MinValue + 1, 2, EmptyString, SomeString)]
+    [InlineData(MinusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(-1, 2, EmptyString, SomeString)]
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(int.MinValue, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MinValue + 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(MinusFifteen, 3, LowerSomeString, null, SomeString)]
     [InlineData(-1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.Indexer.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.Indexer.cs
index aac59e1..576f979 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.Indexer.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.Indexer.cs
@@ -8,11 +8,15 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayTest
 {
     [Theory]
+    [InlineData(int.MinValue)]
+    [InlineData(int.MinValue + 1)]
     [InlineData(MinusFifteen)]
-    [InlineData(MinusOne)]
-    [InlineData(Zero)]
-    [InlineData(One)]
+    [InlineData(-1)]
+    [InlineData(0)]
+    [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void Indexer_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var source = default(FlatArray<RefType>);
@@ -46,10 +50,42 @@ public void Indexer_IndexIsInRange_ExpectItemIsFromSourceItemsByIndex(
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
+    [InlineData(int.MinValue, 1, SomeString)]
+    [InlineData(int.MinValue + 1, 1, SomeString)]
+    [InlineData(MinusFifteen, 1, SomeString)]
+    [InlineData(-1, 1, SomeString)]
     [InlineData(1, 1, SomeString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
+    [InlineData(int.MinValue, 1, EmptyString, AnotherString)]
+    [InlineData(int.MinValue + 1, 1, EmptyString, AnotherString)]
+    [InlineData(MinusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(-1, 1, EmptyString, AnotherString)]
     [InlineData(1, 1, EmptyString, AnotherString)]
-    [InlineData(5, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(int.MinValue, 2, EmptyString, SomeString)]
+    [InlineData(int.MinValue + 1, 2, EmptyString, SomeString)]
+    [InlineData(MinusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(-1, 2, EmptyString, SomeString)]
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(int.MinValue, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MinValue + 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(MinusFifteen, 3, LowerSomeString, null, SomeString)]
     [InlineData(-1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void Indexer_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromEnd.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromEnd.cs
index 5a344ac..5c77cf8 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromEnd.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromEnd.cs
@@ -8,9 +8,11 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayTest
 {
     [Theory]
-    [InlineData(Zero)]
-    [InlineData(One)]
+    [InlineData(0)]
+    [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_IndexFromEnd_SourceIsDefault_ExpectIndexOutOfRangeException(int indexFromEnd)
     {
         var fromEnd = Index.FromEnd(indexFromEnd);
@@ -45,12 +47,26 @@ public void IndexerRef_IndexFromEnd_IndexIsInRange_ExpectItemIsFromSourceItemsBy
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
     [InlineData(0, 1, SomeString)]
     [InlineData(2, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
     [InlineData(0, 1, EmptyString, AnotherString)]
     [InlineData(2, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(0, 2, EmptyString, SomeString)]
+    [InlineData(3, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
     [InlineData(0, 3, LowerSomeString, null, SomeString)]
     [InlineData(4, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexFromEnd_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int indexFromEnd, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromStart.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromStart.cs
index 5fe8485..fcc1ab7 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromStart.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.IndexFromStart.cs
@@ -8,9 +8,11 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayTest
 {
     [Theory]
-    [InlineData(Zero)]
-    [InlineData(One)]
+    [InlineData(0)]
+    [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_IndexFromStart_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var fromStart = Index.FromStart(index);
@@ -48,9 +50,26 @@ public void IndexerRef_IndexFromStart_IndexIsInRange_ExpectItemIsFromSourceItems
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
     [InlineData(1, 1, SomeString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
     [InlineData(1, 1, EmptyString, AnotherString)]
-    [InlineData(5, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexFromStart_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {
diff --git a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.cs b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.cs
index fa22a62..277b3a9 100644
--- a/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.cs
+++ b/src/flatcollections-array/FlatArray.Tests/Tests.FlatArray.T/Array/Array.IndexerRef.cs
@@ -8,11 +8,15 @@ namespace PrimeFuncPack.Core.Tests;
 partial class FlatArrayTest
 {
     [Theory]
+    [InlineData(int.MinValue)]
+    [InlineData(int.MinValue + 1)]
     [InlineData(MinusFifteen)]
-    [InlineData(MinusOne)]
-    [InlineData(Zero)]
-    [InlineData(One)]
+    [InlineData(-1)]
+    [InlineData(0)]
+    [InlineData(1)]
     [InlineData(PlusFifteen)]
+    [InlineData(int.MaxValue - 1)]
+    [InlineData(int.MaxValue)]
     public void IndexerRef_SourceIsDefault_ExpectIndexOutOfRangeException(int index)
     {
         var source = default(FlatArray<RefType>);
@@ -46,10 +50,42 @@ public void IndexerRef_IndexIsInRange_ExpectItemIsFromSourceItemsByIndex(
     }
 
     [Theory]
+    // Effective Length: 1, Inner array length: 1
+    [InlineData(int.MinValue, 1, SomeString)]
+    [InlineData(int.MinValue + 1, 1, SomeString)]
+    [InlineData(MinusFifteen, 1, SomeString)]
+    [InlineData(-1, 1, SomeString)]
     [InlineData(1, 1, SomeString)]
+    [InlineData(PlusFifteen, 1, SomeString)]
+    [InlineData(int.MaxValue - 1, 1, SomeString)]
+    [InlineData(int.MaxValue, 1, SomeString)]
+    // Effective Length: 1, Inner array length: 2
+    [InlineData(int.MinValue, 1, EmptyString, AnotherString)]
+    [InlineData(int.MinValue + 1, 1, EmptyString, AnotherString)]
+    [InlineData(MinusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(-1, 1, EmptyString, AnotherString)]
     [InlineData(1, 1, EmptyString, AnotherString)]
-    [InlineData(5, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue - 1, 1, EmptyString, AnotherString)]
+    [InlineData(int.MaxValue, 1, EmptyString, AnotherString)]
+    // Effective Length: 2, Inner array length: 2
+    [InlineData(int.MinValue, 2, EmptyString, SomeString)]
+    [InlineData(int.MinValue + 1, 2, EmptyString, SomeString)]
+    [InlineData(MinusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(-1, 2, EmptyString, SomeString)]
+    [InlineData(2, 2, EmptyString, SomeString)]
+    [InlineData(PlusFifteen, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue - 1, 2, EmptyString, SomeString)]
+    [InlineData(int.MaxValue, 2, EmptyString, SomeString)]
+    // Effective Length: 3, Inner array length: 3
+    [InlineData(int.MinValue, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MinValue + 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(MinusFifteen, 3, LowerSomeString, null, SomeString)]
     [InlineData(-1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(3, 3, LowerSomeString, null, SomeString)]
+    [InlineData(PlusFifteen, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue - 1, 3, LowerSomeString, null, SomeString)]
+    [InlineData(int.MaxValue, 3, LowerSomeString, null, SomeString)]
     public void IndexerRef_IndexIsOutOfRange_ExpectIndexOutOfRangeException(
         int index, int sourceLength, params string?[] sourceItems)
     {