Added support for Gemini models

tests/helpers/test-models.cjs

@@ -0,0 +1,87 @@
+/**
+ * Test Models Configuration
+ *
+ * Provides model configuration for parameterized testing across
+ * multiple model families (Claude and Gemini).
+ */
+
+// Default test models for each family
+const TEST_MODELS = {
+    claude: 'claude-sonnet-4-5-thinking',
+    gemini: 'gemini-3-flash'
+};
+
+// Default thinking model for each family
+const THINKING_MODELS = {
+    claude: 'claude-sonnet-4-5-thinking',
+    gemini: 'gemini-3-flash'
+};
+
+/**
+ * Get models to test, optionally excluding certain families.
+ * @param {string[]} excludeFamilies - Array of family names to exclude (e.g., ['gemini'])
+ * @returns {Array<{family: string, model: string}>} Array of model configs to test
+ */
+function getTestModels(excludeFamilies = []) {
+    const models = [];
+    for (const [family, model] of Object.entries(TEST_MODELS)) {
+        if (!excludeFamilies.includes(family)) {
+            models.push({ family, model });
+        }
+    }
+    return models;
+}
+
+/**
+ * Get thinking models to test, optionally excluding certain families.
+ * @param {string[]} excludeFamilies - Array of family names to exclude
+ * @returns {Array<{family: string, model: string}>} Array of thinking model configs
+ */
+function getThinkingModels(excludeFamilies = []) {
+    const models = [];
+    for (const [family, model] of Object.entries(THINKING_MODELS)) {
+        if (!excludeFamilies.includes(family)) {
+            models.push({ family, model });
+        }
+    }
+    return models;
+}
+
+/**
+ * Check if a model family requires thinking features.
+ * Both Claude thinking models and Gemini 3+ support thinking.
+ * @param {string} family - Model family name
+ * @returns {boolean} True if thinking is expected
+ */
+function familySupportsThinking(family) {
+    // Both Claude thinking models and Gemini 3+ support thinking
+    return family === 'claude' || family === 'gemini';
+}
+
+/**
+ * Get model-specific configuration overrides.
+ * @param {string} family - Model family name
+ * @returns {Object} Configuration overrides for the model family
+ */
+function getModelConfig(family) {
+    if (family === 'gemini') {
+        return {
+            // Gemini has lower max output tokens
+            max_tokens: 8000,
+            thinking: { type: 'enabled', budget_tokens: 10000 }
+        };
+    }
+    return {
+        max_tokens: 16000,
+        thinking: { type: 'enabled', budget_tokens: 10000 }
+    };
+}
+
+module.exports = {
+    TEST_MODELS,
+    THINKING_MODELS,
+    getTestModels,
+    getThinkingModels,
+    familySupportsThinking,
+    getModelConfig
+};