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firebase-ios-sdk/FirebaseAI/Tests/Unit/GenerativeModelGoogleAITests.swift
T

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Swift

// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import FirebaseAppCheckInterop
import FirebaseAuthInterop
import FirebaseCore
import XCTest
@testable import FirebaseAI
@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
final class GenerativeModelGoogleAITests: XCTestCase {
let testPrompt = "What sorts of questions can I ask you?"
let safetyRatingsNegligible: [SafetyRating] = [
.init(
category: .sexuallyExplicit,
probability: .negligible,
probabilityScore: 0.0,
severity: SafetyRating.HarmSeverity(rawValue: "HARM_SEVERITY_UNSPECIFIED"),
severityScore: 0.0,
blocked: false
),
.init(
category: .hateSpeech,
probability: .negligible,
probabilityScore: 0.0,
severity: SafetyRating.HarmSeverity(rawValue: "HARM_SEVERITY_UNSPECIFIED"),
severityScore: 0.0,
blocked: false
),
.init(
category: .harassment,
probability: .negligible,
probabilityScore: 0.0,
severity: SafetyRating.HarmSeverity(rawValue: "HARM_SEVERITY_UNSPECIFIED"),
severityScore: 0.0,
blocked: false
),
.init(
category: .dangerousContent,
probability: .negligible,
probabilityScore: 0.0,
severity: SafetyRating.HarmSeverity(rawValue: "HARM_SEVERITY_UNSPECIFIED"),
severityScore: 0.0,
blocked: false
),
].sorted()
let testModelName = "test-model"
let testModelResourceName = "projects/test-project-id/models/test-model"
let apiConfig = FirebaseAI.defaultVertexAIAPIConfig
let googleAISubdirectory = "mock-responses/googleai"
var urlSession: URLSession!
var model: GenerativeModel!
override func setUp() async throws {
let configuration = URLSessionConfiguration.default
configuration.protocolClasses = [MockURLProtocol.self]
urlSession = try XCTUnwrap(URLSession(configuration: configuration))
model = GenerativeModel(
modelName: testModelName,
modelResourceName: testModelResourceName,
firebaseInfo: GenerativeModelTestUtil.testFirebaseInfo(),
apiConfig: apiConfig,
tools: nil,
requestOptions: RequestOptions(),
urlSession: urlSession
)
}
override func tearDown() {
MockURLProtocol.requestHandler = nil
}
// MARK: - Generate Content
func testGenerateContent_success_basicReplyLong() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-success-basic-reply-long",
withExtension: "json",
subdirectory: googleAISubdirectory
)
let response = try await model.generateContent(testPrompt)
XCTAssertEqual(response.candidates.count, 1)
let candidate = try XCTUnwrap(response.candidates.first)
let finishReason = try XCTUnwrap(candidate.finishReason)
XCTAssertEqual(finishReason, .stop)
XCTAssertEqual(candidate.safetyRatings.count, 4)
XCTAssertEqual(candidate.content.parts.count, 1)
let part = try XCTUnwrap(candidate.content.parts.first)
let partText = try XCTUnwrap(part as? TextPart).text
XCTAssertTrue(partText.hasPrefix("Making professional-quality"))
XCTAssertEqual(response.text, partText)
XCTAssertEqual(response.functionCalls, [])
XCTAssertEqual(response.inlineDataParts, [])
}
func testGenerateContent_success_basicReplyShort() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-success-basic-reply-short",
withExtension: "json",
subdirectory: googleAISubdirectory
)
let response = try await model.generateContent(testPrompt)
XCTAssertEqual(response.candidates.count, 1)
let candidate = try XCTUnwrap(response.candidates.first)
let finishReason = try XCTUnwrap(candidate.finishReason)
XCTAssertEqual(finishReason, .stop)
XCTAssertEqual(candidate.safetyRatings.sorted(), safetyRatingsNegligible)
XCTAssertEqual(candidate.content.parts.count, 1)
let part = try XCTUnwrap(candidate.content.parts.first)
let textPart = try XCTUnwrap(part as? TextPart)
XCTAssertTrue(textPart.text.hasPrefix("Google's headquarters"))
XCTAssertEqual(response.text, textPart.text)
XCTAssertEqual(response.functionCalls, [])
XCTAssertEqual(response.inlineDataParts, [])
}
func testGenerateContent_success_citations() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-success-citations",
withExtension: "json",
subdirectory: googleAISubdirectory
)
let response = try await model.generateContent(testPrompt)
XCTAssertEqual(response.candidates.count, 1)
let candidate = try XCTUnwrap(response.candidates.first)
XCTAssertEqual(candidate.content.parts.count, 1)
let text = try XCTUnwrap(response.text)
XCTAssertTrue(text.hasPrefix("Okay, let's break down quantum mechanics."))
let citationMetadata = try XCTUnwrap(candidate.citationMetadata)
XCTAssertEqual(citationMetadata.citations.count, 4)
let citationSource1 = try XCTUnwrap(citationMetadata.citations[0])
XCTAssertEqual(citationSource1.uri, "https://www.example.com/some-citation-1")
XCTAssertEqual(citationSource1.startIndex, 548)
XCTAssertEqual(citationSource1.endIndex, 690)
XCTAssertNil(citationSource1.title)
XCTAssertEqual(citationSource1.license, "mit")
XCTAssertNil(citationSource1.publicationDate)
let citationSource2 = try XCTUnwrap(citationMetadata.citations[1])
XCTAssertEqual(citationSource2.uri, "https://www.example.com/some-citation-1")
XCTAssertEqual(citationSource2.startIndex, 1240)
XCTAssertEqual(citationSource2.endIndex, 1407)
XCTAssertNil(citationSource2.title, "some-citation-2")
XCTAssertNil(citationSource2.license)
XCTAssertNil(citationSource2.publicationDate)
let citationSource3 = try XCTUnwrap(citationMetadata.citations[2])
XCTAssertEqual(citationSource3.startIndex, 1942)
XCTAssertEqual(citationSource3.endIndex, 2149)
XCTAssertNil(citationSource3.uri)
XCTAssertNil(citationSource3.license)
XCTAssertNil(citationSource3.title)
XCTAssertNil(citationSource3.publicationDate)
let citationSource4 = try XCTUnwrap(citationMetadata.citations[3])
XCTAssertEqual(citationSource4.startIndex, 2036)
XCTAssertEqual(citationSource4.endIndex, 2175)
XCTAssertNil(citationSource4.uri)
XCTAssertNil(citationSource4.license)
XCTAssertNil(citationSource4.title)
XCTAssertNil(citationSource4.publicationDate)
}
func testGenerateContent_usageMetadata() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-success-basic-reply-short",
withExtension: "json",
subdirectory: googleAISubdirectory
)
let response = try await model.generateContent(testPrompt)
let usageMetadata = try XCTUnwrap(response.usageMetadata)
XCTAssertEqual(usageMetadata.promptTokenCount, 7)
XCTAssertEqual(usageMetadata.promptTokensDetails.count, 1)
XCTAssertEqual(usageMetadata.promptTokensDetails[0].modality, .text)
XCTAssertEqual(usageMetadata.promptTokensDetails[0].tokenCount, 7)
XCTAssertEqual(usageMetadata.candidatesTokenCount, 22)
XCTAssertEqual(usageMetadata.candidatesTokensDetails.count, 1)
XCTAssertEqual(usageMetadata.candidatesTokensDetails[0].modality, .text)
XCTAssertEqual(usageMetadata.candidatesTokensDetails[0].tokenCount, 22)
}
func testGenerateContent_failure_invalidAPIKey() async throws {
let expectedStatusCode = 400
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-failure-api-key",
withExtension: "json",
subdirectory: googleAISubdirectory,
statusCode: expectedStatusCode
)
do {
_ = try await model.generateContent(testPrompt)
XCTFail("Should throw GenerateContentError.internalError; no error thrown.")
} catch let GenerateContentError.internalError(error as BackendError) {
XCTAssertEqual(error.httpResponseCode, 400)
XCTAssertEqual(error.status, .invalidArgument)
XCTAssertEqual(error.message, "API key not valid. Please pass a valid API key.")
XCTAssertTrue(error.localizedDescription.contains(error.message))
XCTAssertTrue(error.localizedDescription.contains(error.status.rawValue))
XCTAssertTrue(error.localizedDescription.contains("\(error.httpResponseCode)"))
let nsError = error as NSError
XCTAssertEqual(nsError.domain, "\(Constants.baseErrorDomain).\(BackendError.self)")
XCTAssertEqual(nsError.code, error.httpResponseCode)
return
} catch {
XCTFail("Should throw GenerateContentError.internalError(RPCError); error thrown: \(error)")
}
}
func testGenerateContent_failure_finishReasonSafety() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-failure-finish-reason-safety",
withExtension: "json",
subdirectory: googleAISubdirectory
)
do {
_ = try await model.generateContent(testPrompt)
XCTFail("Should throw")
} catch let GenerateContentError.responseStoppedEarly(reason, response) {
XCTAssertEqual(reason, .safety)
XCTAssertEqual(response.text, "Safety error incoming in 5, 4, 3, 2...")
} catch {
XCTFail("Should throw a responseStoppedEarly")
}
}
func testGenerateContent_failure_unknownModel() async throws {
let expectedStatusCode = 404
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-failure-unknown-model",
withExtension: "json",
subdirectory: googleAISubdirectory,
statusCode: 404
)
do {
_ = try await model.generateContent(testPrompt)
XCTFail("Should throw GenerateContentError.internalError; no error thrown.")
} catch let GenerateContentError.internalError(underlying: rpcError as BackendError) {
XCTAssertEqual(rpcError.status, .notFound)
XCTAssertEqual(rpcError.httpResponseCode, expectedStatusCode)
XCTAssertTrue(rpcError.message.hasPrefix("models/gemini-5.0-flash is not found"))
} catch {
XCTFail("Should throw GenerateContentError.internalError; error thrown: \(error)")
}
}
// MARK: - Generate Content (Streaming)
func testGenerateContentStream_successBasicReplyLong() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "streaming-success-basic-reply-long",
withExtension: "txt",
subdirectory: googleAISubdirectory
)
var responses = 0
let stream = try model.generateContentStream("Hi")
for try await content in stream {
XCTAssertNotNil(content.text)
responses += 1
}
XCTAssertEqual(responses, 36)
}
func testGenerateContentStream_successBasicReplyShort() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "streaming-success-basic-reply-short",
withExtension: "txt",
subdirectory: googleAISubdirectory
)
var responses = 0
let stream = try model.generateContentStream("Hi")
for try await content in stream {
XCTAssertNotNil(content.text)
responses += 1
}
XCTAssertEqual(responses, 3)
}
func testGenerateContentStream_successWithCitations() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "streaming-success-citations",
withExtension: "txt",
subdirectory: googleAISubdirectory
)
let stream = try model.generateContentStream("Hi")
var citations = [Citation]()
var responses = [GenerateContentResponse]()
for try await content in stream {
responses.append(content)
XCTAssertNotNil(content.text)
let candidate = try XCTUnwrap(content.candidates.first)
if let sources = candidate.citationMetadata?.citations {
citations.append(contentsOf: sources)
}
}
let lastCandidate = try XCTUnwrap(responses.last?.candidates.first)
XCTAssertEqual(lastCandidate.finishReason, .stop)
XCTAssertEqual(citations.count, 1)
let citation = try XCTUnwrap(citations.first)
XCTAssertEqual(citation.startIndex, 111)
XCTAssertEqual(citation.endIndex, 236)
let citationURI = try XCTUnwrap(citation.uri)
XCTAssertTrue(citationURI.starts(with: "https://www."))
XCTAssertNil(citation.license)
XCTAssertNil(citation.title)
XCTAssertNil(citation.publicationDate)
}
func testGenerateContentStream_failureInvalidAPIKey() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "unary-failure-api-key",
withExtension: "json",
subdirectory: googleAISubdirectory
)
do {
let stream = try model.generateContentStream("Hi")
for try await _ in stream {
XCTFail("No content is there, this shouldn't happen.")
}
} catch let GenerateContentError.internalError(error as BackendError) {
XCTAssertEqual(error.httpResponseCode, 400)
XCTAssertEqual(error.status, .invalidArgument)
XCTAssertEqual(error.message, "API key not valid. Please pass a valid API key.")
XCTAssertTrue(error.localizedDescription.contains(error.message))
XCTAssertTrue(error.localizedDescription.contains(error.status.rawValue))
XCTAssertTrue(error.localizedDescription.contains("\(error.httpResponseCode)"))
let nsError = error as NSError
XCTAssertEqual(nsError.domain, "\(Constants.baseErrorDomain).\(BackendError.self)")
XCTAssertEqual(nsError.code, error.httpResponseCode)
return
}
XCTFail("Should have caught an error.")
}
func testGenerateContentStream_failureFinishRecitation() async throws {
MockURLProtocol.requestHandler = try GenerativeModelTestUtil.httpRequestHandler(
forResource: "streaming-failure-recitation-no-content",
withExtension: "txt",
subdirectory: googleAISubdirectory
)
var responses = [GenerateContentResponse]()
do {
let stream = try model.generateContentStream("Hi")
for try await response in stream {
responses.append(response)
}
XCTFail("Expected a GenerateContentError.responseStoppedEarly error, but got no error.")
} catch let GenerateContentError.responseStoppedEarly(reason, response) {
XCTAssertEqual(reason, .recitation)
let candidate = try XCTUnwrap(response.candidates.first)
XCTAssertEqual(candidate.finishReason, reason)
} catch {
XCTFail("Expected a GenerateContentError.responseStoppedEarly error, but got error: \(error)")
}
XCTAssertEqual(responses.count, 8)
let firstResponse = try XCTUnwrap(responses.first)
XCTAssertEqual(firstResponse.text, "text1")
let lastResponse = try XCTUnwrap(responses.last)
XCTAssertEqual(lastResponse.text, "text8")
}
}