Properly accept char and cellstr in extractOpenAIEmbeddings

Fixes #85

Author: ccreutzi

extractOpenAIEmbeddings.m

@@ -23,17 +23,18 @@
 %   Copyright 2023-2024 The MathWorks, Inc.
 
 arguments
-    text           (1,:) {mustBeNonzeroLengthText}
-    nvp.ModelName  (1,1) {mustBeMember(nvp.ModelName,["text-embedding-ada-002", ...
-                        "text-embedding-3-large", "text-embedding-3-small"])} = "text-embedding-ada-002"
-    nvp.TimeOut    (1,1) {mustBeNumeric,mustBeReal,mustBePositive} = 10
-    nvp.Dimensions (1,1) {mustBeNumeric,mustBeInteger,mustBePositive}
-    nvp.APIKey           {llms.utils.mustBeNonzeroLengthTextScalar}
+    text           (1,:)        {mustBeNonzeroLengthText}
+    nvp.ModelName  (1,1) string {mustBeMember(nvp.ModelName,["text-embedding-ada-002", ...
+                                        "text-embedding-3-large", "text-embedding-3-small"])} = "text-embedding-ada-002"
+    nvp.TimeOut    (1,1)        {mustBeNumeric,mustBeReal,mustBePositive} = 10
+    nvp.Dimensions (1,1)        {mustBeNumeric,mustBeInteger,mustBePositive}
+    nvp.APIKey                  {llms.utils.mustBeNonzeroLengthTextScalar}
 end
 
 END_POINT = "https://api.openai.com/v1/embeddings";
 
 key = llms.internal.getApiKeyFromNvpOrEnv(nvp,"OPENAI_API_KEY");
+text = convertCharsToStrings(text);
 
 parameters = struct("input",text,"model",nvp.ModelName);
 

tests/textractOpenAIEmbeddings.m

@@ -5,6 +5,7 @@
 
     properties(TestParameter)
         InvalidInput = iGetInvalidInput();
+        ValidInput = iGetValidInput();
         ValidDimensionsModelCombinations = iGetValidDimensionsModelCombinations();
     end
 
@@ -34,8 +35,9 @@ function validCombinationOfModelAndDimension(testCase, ValidDimensionsModelCombi
                 APIKey="not-real"));
         end
 
-        function embedStringWithSuccessfulOpenAICall(testCase)
-            testCase.verifyWarningFree(@()extractOpenAIEmbeddings("bla"));
+        function embedTextWithSuccessfulOpenAICall(testCase,ValidInput)
+            result = testCase.verifyWarningFree(@()extractOpenAIEmbeddings(ValidInput.Input{:}));
+            testCase.verifySize(result, ValidInput.ExpectedSize);
         end
 
         function invalidCombinationOfModelAndDimension(testCase)
@@ -57,6 +59,31 @@ function testInvalidInputs(testCase, InvalidInput)
     end    
 end
 
+function validInput = iGetValidInput()
+validInput = struct( ...
+    "ScalarString", struct( ...
+        "Input",{{ "blah" }}, ...
+        "ExpectedSize",[1,1536]), ...
+    "StringVector", struct( ...
+        "Input",{{ ["a", "b", "c"] }}, ...
+        "ExpectedSize",[3,1536]), ...
+    "CharVector", struct( ...
+        "Input", {{ 'foo' }}, ...
+        "ExpectedSize",[1,1536]), ...
+    "Cellstr", struct( ...
+        "Input",{{ {'cat', 'dog', 'mouse'} }}, ...
+        "ExpectedSize",[3,1536]), ...
+    "ModelAsString", struct( ...
+        "Input",{{ "foo","ModelName","text-embedding-3-small" }}, ...
+        "ExpectedSize",[1,1536]), ...
+    "ModelAsChar", struct( ...
+        "Input",{{ "foo","ModelName",'text-embedding-3-small' }}, ...
+        "ExpectedSize",[1,1536]), ...
+    "ModelAsCellstr", struct( ...
+        "Input",{{ "foo","ModelName",{'text-embedding-3-small'} }}, ...
+        "ExpectedSize",[1,1536]));
+end
+
 function invalidInput = iGetInvalidInput()
 invalidInput = struct( ...
     "InvalidEmptyText", struct( ...