add VerifyPhoneNumberWithRceAuditSuccess test

Author: srushtisv

FirebaseAuth/Tests/Unit/PhoneAuthProviderTests.swift

@@ -208,6 +208,45 @@
       )
     }
 
+    /**
+     @fn testVerifyPhoneNumberWithRceAudit
+     @brief Tests a successful invocation of @c verifyPhoneNumber with recaptcha enterprise in audit mode
+     */
+    func testVerifyPhoneNumberWithRceAuditSuccess() async throws {
+      initApp(#function)
+      let auth = try XCTUnwrap(PhoneAuthProviderTests.auth)
+      let provider = PhoneAuthProvider.provider(auth: auth)
+      let mockVerifier = FakeAuthRecaptchaVerifier(captchaResponse: kCaptchaResponse)
+      AuthRecaptchaVerifier.setShared(mockVerifier, auth: auth)
+      rpcIssuer.rceMode = "AUDIT"
+      let requestExpectation = expectation(description: "verifyRequester")
+      rpcIssuer?.verifyRequester = { request in
+        XCTAssertEqual(request.phoneNumber, self.kTestPhoneNumber)
+        XCTAssertEqual(request.captchaResponse, self.kCaptchaResponse)
+        XCTAssertEqual(request.recaptchaVersion, "RECAPTCHA_ENTERPRISE")
+        XCTAssertEqual(request.codeIdentity, CodeIdentity.empty)
+        requestExpectation.fulfill()
+        do {
+          try self.rpcIssuer?
+            .respond(withJSON: [self.kVerificationIDKey: self.kTestVerificationID])
+        } catch {
+          XCTFail("Failure sending response: \(error)")
+        }
+      }
+      do {
+        let result = try await provider.verifyClAndSendVerificationCodeWithRecaptcha(
+          toPhoneNumber: kTestPhoneNumber,
+          retryOnInvalidAppCredential: false,
+          uiDelegate: nil,
+          recaptchaVerifier: mockVerifier
+        )
+        XCTAssertEqual(result, kTestVerificationID)
+      } catch {
+        XCTFail("Unexpected error")
+      }
+      await fulfillment(of: [requestExpectation], timeout: 5.0)
+    }
+
     /** @fn testVerifyPhoneNumberInTestMode
      @brief Tests a successful invocation of @c verifyPhoneNumber:completion: when app verification
      is disabled.