Merge pull request #138 from mathworks/toobig-test-fix

Toobig test fix

Author: jhughes-mw

CLAUDE.md

@@ -31,12 +31,14 @@ The codebase is a three-language stack. Data and type information flow across al
 There is no build step — it's interpreted MATLAB plus a Python module on the path.
 
 **Run the full test suite** (from the `test/` directory, since tests resolve data paths relative to `pwd`):
+
 ```matlab
 cd test
 results = runtests('IncludeSubfolders', true)
 ```
 
 **Run a single test class or method:**
+
 ```matlab
 cd test
 runtests('tZarrRead')                       % one class

SECURITY.md

@@ -1,6 +1,6 @@
-# Reporting Security Vulnerabilities 
+# Reporting Security Vulnerabilities
 
-If you believe you have discovered a security vulnerability, please report it to 
-[security@mathworks.com](mailto:security@mathworks.com). Please see 
-[MathWorks Vulnerability Disclosure Policy for Security Researchers](https://www.mathworks.com/company/aboutus/policies_statements/vulnerability-disclosure-policy.html) 
-for additional information.  
+If you believe you have discovered a security vulnerability, please report it to
+[security@mathworks.com](mailto:security@mathworks.com).
+
+Please see: [MathWorks Vulnerability Disclosure Policy for Security Researchers](https://www.mathworks.com/company/aboutus/policies_statements/vulnerability-disclosure-policy.html) for additional information.

ZarrDatatype.m

@@ -2,7 +2,7 @@
     %ZARRDATATYPE Datatype of Zarr data
     %   Represents the datatype mapping between MATLAB, Tensorstore, and Zarr
 
-    % Copyright 2025 The MathWorks, Inc.
+    % Copyright 2025-2026 The MathWorks, Inc.
 
     properties(Constant, Hidden)
         % Same-length arrays that represent mapping between 
@@ -28,8 +28,7 @@
         MATLABType
     end
 
-    methods (Hidden)
-        % "Private" constructor - should not be used directly. 
+    methods (Access = private)
         % Use from*Type() static methods instead.
         function obj = ZarrDatatype(ind)
             obj.Index = ind;

test/tZarrRead.m

@@ -1,7 +1,7 @@
 classdef tZarrRead < SharedZarrTestSetup
     % Tests for zarrread function to read data from Zarr files in MATLAB.
 
-    % Copyright 2025 The MathWorks, Inc.
+    % Copyright 2025-2026 The MathWorks, Inc.
 
     properties(Constant)
         % Paths for read functions. SharedZarrTestSetup copies the contents
@@ -119,7 +119,17 @@ function nonExistentArray(testcase)
         function tooBigArray(testcase)
             % Verify zarrread error when a user tries to read data that is
             % too large
-            
+
+            % Lower the array size limit so the ~37 GiB array below always
+            % exceeds it, regardless of how much RAM this machine has.
+            s = settings;
+            limitEnabled = s.matlab.desktop.workspace.ArraySizeLimitEnabled;
+            limitPercent = s.matlab.desktop.workspace.ArraySizeLimit;
+            testcase.addTeardown(@() clearTemporaryValue(limitEnabled));
+            testcase.addTeardown(@() clearTemporaryValue(limitPercent));
+            limitEnabled.TemporaryValue = true;
+            limitPercent.TemporaryValue = 1;
+
             bigDataPath = "bigData/myzarr";
             zarrcreate(bigDataPath, [100000,100000], Datatype='single');
             errID = 'MATLAB:Zarr:OutOfMemory';