Update unit tests to reflect the new logic proposal

Author: Tito Ciuro

FirebaseFunctions/Tests/Integration/IntegrationTests.swift

@@ -442,7 +442,7 @@ class IntegrationTests: XCTestCase {
         } catch {
           let error = error as NSError
           XCTAssertEqual(FunctionsErrorCode.internal.rawValue, error.code)
-          XCTAssertEqual("INTERNAL", error.localizedDescription)
+          XCTAssertNotEqual("INTERNAL", error.localizedDescription)
           expectation.fulfill()
           return
         }
@@ -473,7 +473,7 @@ class IntegrationTests: XCTestCase {
         } catch {
           let error = error as NSError
           XCTAssertEqual(FunctionsErrorCode.internal.rawValue, error.code)
-          XCTAssertEqual("INTERNAL", error.localizedDescription)
+          XCTAssertNotEqual("INTERNAL", error.localizedDescription)
         }
       }
     }
@@ -498,7 +498,7 @@ class IntegrationTests: XCTestCase {
         } catch {
           let error = error as NSError
           XCTAssertEqual(FunctionsErrorCode.internal.rawValue, error.code)
-          XCTAssertEqual("INTERNAL", error.localizedDescription)
+          XCTAssertNotEqual("INTERNAL", error.localizedDescription)
           expectation.fulfill()
           return
         }
@@ -528,7 +528,7 @@ class IntegrationTests: XCTestCase {
         } catch {
           let error = error as NSError
           XCTAssertEqual(FunctionsErrorCode.internal.rawValue, error.code)
-          XCTAssertEqual("INTERNAL", error.localizedDescription)
+          XCTAssertNotEqual("INTERNAL", error.localizedDescription)
         }
       }
     }

FirebaseFunctions/Tests/ObjCIntegration/FIRIntegrationTests.m

@@ -226,7 +226,7 @@ - (void)testUnknownError {
                 completion:^(FIRHTTPSCallableResult *_Nullable result, NSError *_Nullable error) {
                   XCTAssertNotNil(error);
                   XCTAssertEqual(FIRFunctionsErrorCodeInternal, error.code);
-                  XCTAssertEqualObjects(@"INTERNAL", error.localizedDescription);
+                  XCTAssertNotEqualObjects(@"INTERNAL", error.localizedDescription);
                   [expectation fulfill];
                 }];
   [self waitForExpectations:@[ expectation ] timeout:10];