Fix wording in GenerativeModelVertexAITests

Author: andrewheard

FirebaseAI/Tests/Unit/GenerativeModelVertexAITests.swift

@@ -808,11 +808,11 @@ final class GenerativeModelVertexAITests: XCTestCase {
     } catch let GenerateContentError
       .internalError(underlying: invalidCandidateError as InvalidCandidateError) {
       guard case let .emptyContent(underlyingError) = invalidCandidateError else {
-        XCTFail("Not an InvalidCandidateError.emptyContent error: \(invalidCandidateError)")
+        XCTFail("Should be an InvalidCandidateError.emptyContent error: \(invalidCandidateError)")
         return
       }
       _ = try XCTUnwrap(underlyingError as? Candidate.EmptyContentError,
-                        "Not an empty content error: \(underlyingError)")
+                        "Should be an empty content error: \(underlyingError)")
     } catch {
       XCTFail("Should throw GenerateContentError.internalError; error thrown: \(error)")
     }
@@ -997,7 +997,7 @@ final class GenerativeModelVertexAITests: XCTestCase {
     XCTAssertNotNil(responseError)
     let generateContentError = try XCTUnwrap(responseError as? GenerateContentError)
     guard case let .internalError(underlyingError) = generateContentError else {
-      XCTFail("Not an internal error: \(generateContentError)")
+      XCTFail("Should be an internal error: \(generateContentError)")
       return
     }
     XCTAssertEqual(underlyingError.localizedDescription, "Response was not an HTTP response.")
@@ -1025,12 +1025,12 @@ final class GenerativeModelVertexAITests: XCTestCase {
     XCTAssertNotNil(responseError)
     let generateContentError = try XCTUnwrap(responseError as? GenerateContentError)
     guard case let .internalError(underlyingError) = generateContentError else {
-      XCTFail("Not an internal error: \(generateContentError)")
+      XCTFail("Should be an internal error: \(generateContentError)")
       return
     }
     let decodingError = try XCTUnwrap(underlyingError as? DecodingError)
     guard case let .dataCorrupted(context) = decodingError else {
-      XCTFail("Not a data corrupted error: \(decodingError)")
+      XCTFail("Should be a data corrupted error: \(decodingError)")
       return
     }
     XCTAssert(context.debugDescription.hasPrefix("Failed to decode GenerateContentResponse"))
@@ -1059,17 +1059,17 @@ final class GenerativeModelVertexAITests: XCTestCase {
     XCTAssertNotNil(responseError)
     let generateContentError = try XCTUnwrap(responseError as? GenerateContentError)
     guard case let .internalError(underlyingError) = generateContentError else {
-      XCTFail("Not an internal error: \(generateContentError)")
+      XCTFail("Should be an internal error: \(generateContentError)")
       return
     }
     let invalidCandidateError = try XCTUnwrap(underlyingError as? InvalidCandidateError)
     guard case let .emptyContent(emptyContentUnderlyingError) = invalidCandidateError else {
-      XCTFail("Not an empty content error: \(invalidCandidateError)")
+      XCTFail("Should be an empty content error: \(invalidCandidateError)")
       return
     }
     _ = try XCTUnwrap(
       emptyContentUnderlyingError as? Candidate.EmptyContentError,
-      "Not an empty content error: \(emptyContentUnderlyingError)"
+      "Should be an empty content error: \(emptyContentUnderlyingError)"
     )
   }
 
@@ -1584,7 +1584,7 @@ final class GenerativeModelVertexAITests: XCTestCase {
       }
     } catch let GenerateContentError.internalError(underlying as DecodingError) {
       guard case let .dataCorrupted(context) = underlying else {
-        XCTFail("Not a data corrupted error: \(underlying)")
+        XCTFail("Should be a data corrupted error: \(underlying)")
         return
       }
       XCTAssert(context.debugDescription.hasPrefix("Failed to decode GenerateContentResponse"))
@@ -1612,7 +1612,7 @@ final class GenerativeModelVertexAITests: XCTestCase {
       }
     } catch let GenerateContentError.internalError(underlyingError as InvalidCandidateError) {
       guard case let .emptyContent(contentError) = underlyingError else {
-        XCTFail("Not an empty content error: \(underlyingError)")
+        XCTFail("Should be an empty content error: \(underlyingError)")
         return
       }