Drop OPENAI_KEY

For some reason, we used both `OPENAI_KEY` and `OPENAI_API_KEY` env variables, expecting them to have the same values. Drop the `OPENAI_KEY` one, since we document our use of `OPENAI_API_KEY`.

Author: ccreutzi

.github/workflows/ci.yml

@@ -39,7 +39,6 @@ jobs:
           cache: true
       - name: Run tests and generate artifacts
         env:
-            OPENAI_KEY: ${{ secrets.OPENAI_KEY }}
             OPENAI_API_KEY: ${{ secrets.OPENAI_KEY }}
             AZURE_OPENAI_DEPLOYMENT: ${{ secrets.AZURE_DEPLOYMENT }}
             AZURE_OPENAI_ENDPOINT: ${{ secrets.AZURE_ENDPOINT }}

tests/texampleTests.m

@@ -30,7 +30,7 @@ function setUpAndTearDowns(testCase)
             import matlab.unittest.fixtures.CurrentFolderFixture
             testCase.applyFixture(CurrentFolderFixture("../examples/mlx-scripts"));
 
-            openAIEnvVar = "OPENAI_KEY";
+            openAIEnvVar = "OPENAI_API_KEY";
             secretKey = getenv(openAIEnvVar);
             % Create an empty .env file because it is expected by our .mlx
             % example files

tests/textractOpenAIEmbeddings.m

@@ -3,18 +3,6 @@
 
 %   Copyright 2023-2024 The MathWorks, Inc.
 
-    methods (TestClassSetup)
-        function saveEnvVar(testCase)
-            % Ensures key is not in environment variable for tests
-            openAIEnvVar = "OPENAI_API_KEY";
-            if isenv(openAIEnvVar)
-                key = getenv(openAIEnvVar);
-                unsetenv(openAIEnvVar);
-                testCase.addTeardown(@(x) setenv(openAIEnvVar, x), key);
-            end
-        end
-    end
-
     properties(TestParameter)
         InvalidInput = iGetInvalidInput();
         ValidDimensionsModelCombinations = iGetValidDimensionsModelCombinations();
@@ -29,6 +17,13 @@ function embedsDifferentStringTypes(testCase)
         end
 
         function keyNotFound(testCase)
+            % Ensures key is not in environment variable for tests
+            openAIEnvVar = "OPENAI_API_KEY";
+            if isenv(openAIEnvVar)
+                key = getenv(openAIEnvVar);
+                reset = onCleanup(@() setenv(openAIEnvVar, key));
+                unsetenv(openAIEnvVar);
+            end
             testCase.verifyError(@()extractOpenAIEmbeddings("bla"), "llms:keyMustBeSpecified");
         end
 
@@ -40,8 +35,7 @@ function validCombinationOfModelAndDimension(testCase, ValidDimensionsModelCombi
         end
 
         function embedStringWithSuccessfulOpenAICall(testCase)
-            testCase.verifyWarningFree(@()extractOpenAIEmbeddings("bla", ...
-                APIKey=getenv("OPENAI_KEY")));
+            testCase.verifyWarningFree(@()extractOpenAIEmbeddings("bla"));
         end
 
         function invalidCombinationOfModelAndDimension(testCase)

tests/topenAIImages.m

@@ -3,18 +3,6 @@
 
 %   Copyright 2024 The MathWorks, Inc.
 
-    methods (TestClassSetup)
-        function saveEnvVar(testCase)
-            % Ensures key is not in environment variable for tests
-            openAIEnvVar = "OPENAI_API_KEY";
-            if isenv(openAIEnvVar)
-                key = getenv(openAIEnvVar);
-                testCase.addTeardown(@() setenv(openAIEnvVar, key));
-                unsetenv(openAIEnvVar);
-            end
-        end
-    end
-
     properties(TestParameter)
         InvalidConstructorInput = iGetInvalidConstructorInput;
         InvalidGenerateInput = iGetInvalidGenerateInput;  
@@ -32,6 +20,13 @@ function generateAcceptsSingleStringAsInput(testCase)
         end
 
         function keyNotFound(testCase)
+            % Ensures key is not in environment variable for tests
+            openAIEnvVar = "OPENAI_API_KEY";
+            if isenv(openAIEnvVar)
+                key = getenv(openAIEnvVar);
+                reset = onCleanup(@() setenv(openAIEnvVar, key));
+                unsetenv(openAIEnvVar);
+            end
             testCase.verifyError(@()openAIImages, "llms:keyMustBeSpecified");
         end
 
@@ -131,7 +126,7 @@ function invalidInputsVariation(testCase, InvalidVariationInput)
         end
 
         function testThatImageIsReturned(testCase)
-            mdl = openAIImages(APIKey=getenv("OPENAI_KEY"));
+            mdl = openAIImages;
 
             [images, response] = generate(mdl, ...
                 "Create a 3D avatar of a whimsical sushi on the beach. " + ...