Add documentation code snippets for model config (#186)

samples/GenerationConfig.swift

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+// Copyright 2024 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 GoogleGenerativeAI
+import XCTest
+
+// Set up your API Key
+// ====================
+// To use the Gemini API, you'll need an API key. To learn more, see the "Set up your API Key"
+// section in the Gemini API quickstart:
+// https://ai.google.dev/gemini-api/docs/quickstart?lang=swift#set-up-api-key
+
+@available(iOS 15.0, macOS 11.0, macCatalyst 15.0, *)
+final class GenerationConfigSnippets: XCTestCase {
+  override func setUpWithError() throws {
+    try XCTSkipIf(
+      APIKey.default.isEmpty,
+      "`\(APIKey.apiKeyEnvVar)` environment variable not set."
+    )
+  }
+
+  func testConfigureModelParameters() {
+    // [START configure_model_parameters]
+    let config = GenerationConfig(
+      temperature: 0.9,
+      topP: 0.1,
+      topK: 16,
+      candidateCount: 1,
+      maxOutputTokens: 200,
+      stopSequences: ["red", "orange"]
+    )
+
+    let generativeModel =
+      GenerativeModel(
+        // Specify a Gemini model appropriate for your use case
+        name: "gemini-1.5-flash",
+        // Access your API key from your on-demand resource .plist file (see "Set up your API key"
+        // above)
+        apiKey: APIKey.default,
+        generationConfig: config
+      )
+    // [END configure_model_parameters]
+
+    // Added to silence the compiler warning about unused variable.
+    let _ = String(describing: generativeModel)
+  }
+}

samples/SafetySettings.swift

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+// Copyright 2024 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 GoogleGenerativeAI
+import XCTest
+
+// Set up your API Key
+// ====================
+// To use the Gemini API, you'll need an API key. To learn more, see the "Set up your API Key"
+// section in the Gemini API quickstart:
+// https://ai.google.dev/gemini-api/docs/quickstart?lang=swift#set-up-api-key
+
+@available(iOS 15.0, macOS 11.0, macCatalyst 15.0, *)
+final class SafetySettingsSnippets: XCTestCase {
+  override func setUpWithError() throws {
+    try XCTSkipIf(
+      APIKey.default.isEmpty,
+      "`\(APIKey.apiKeyEnvVar)` environment variable not set."
+    )
+  }
+
+  func testSafetySettings() {
+    // [START safety_settings]
+    let generativeModel =
+      GenerativeModel(
+        // Specify a Gemini model appropriate for your use case
+        name: "gemini-1.5-flash",
+        // Access your API key from your on-demand resource .plist file (see "Set up your API key"
+        // above)
+        apiKey: APIKey.default,
+        safetySettings: [SafetySetting(harmCategory: .harassment, threshold: .blockLowAndAbove)]
+      )
+    // [END safety_settings]
+
+    // Added to silence the compiler warning about unused variable.
+    let _ = String(describing: generativeModel)
+  }
+
+  func testSafetySettingsMulti() {
+    // [START safety_settings_multi]
+    let safetySettings = [
+      SafetySetting(harmCategory: .dangerousContent, threshold: .blockLowAndAbove),
+      SafetySetting(harmCategory: .harassment, threshold: .blockMediumAndAbove),
+      SafetySetting(harmCategory: .hateSpeech, threshold: .blockOnlyHigh),
+    ]
+
+    let generativeModel =
+      GenerativeModel(
+        // Specify a Gemini model appropriate for your use case
+        name: "gemini-1.5-flash",
+        // Access your API key from your on-demand resource .plist file (see "Set up your API key"
+        // above)
+        apiKey: APIKey.default,
+        safetySettings: safetySettings
+      )
+    // [END safety_settings_multi]
+
+    // Added to silence the compiler warning about unused variable.
+    let _ = String(describing: generativeModel)
+  }
+}

samples/SystemInstructions.swift

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+// Copyright 2024 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 GoogleGenerativeAI
+import XCTest
+
+// Set up your API Key
+// ====================
+// To use the Gemini API, you'll need an API key. To learn more, see the "Set up your API Key"
+// section in the Gemini API quickstart:
+// https://ai.google.dev/gemini-api/docs/quickstart?lang=swift#set-up-api-key
+
+@available(iOS 15.0, macOS 11.0, macCatalyst 15.0, *)
+final class SystemInstructionsSnippets: XCTestCase {
+  override func setUpWithError() throws {
+    try XCTSkipIf(
+      APIKey.default.isEmpty,
+      "`\(APIKey.apiKeyEnvVar)` environment variable not set."
+    )
+  }
+
+  func testSystemInstruction() {
+    // [START system_instruction]
+    let generativeModel =
+      GenerativeModel(
+        // Specify a model that supports system instructions, like a Gemini 1.5 model
+        name: "gemini-1.5-flash",
+        // Access your API key from your on-demand resource .plist file (see "Set up your API key"
+        // above)
+        apiKey: APIKey.default,
+        systemInstruction: ModelContent(role: "system", parts: "You are a cat. Your name is Neko.")
+      )
+    // [END system_instruction]
+
+    // Added to silence the compiler warning about unused variable.
+    let _ = String(describing: generativeModel)
+  }
+}