Fix tests

Author: cte

src/api/transform/gemini-format.ts

@@ -6,7 +6,7 @@ export function convertAnthropicContentToGemini(content: string | Anthropic.Cont
 		return [{ text: content }]
 	}
 
-	return content.flatMap((block): Part => {
+	return content.flatMap((block): Part | Part[] => {
 		switch (block.type) {
 			case "text":
 				return { text: block.text }
@@ -16,6 +16,79 @@ export function convertAnthropicContentToGemini(content: string | Anthropic.Cont
 				}
 
 				return { inlineData: { data: block.source.data, mimeType: block.source.media_type } }
+			case "tool_use":
+				return {
+					functionCall: {
+						name: block.name,
+						args: block.input as Record<string, unknown>,
+					},
+				}
+			case "tool_result": {
+				// Skip empty tool results
+				if (!block.content) {
+					return []
+				}
+
+				// Extract tool name from tool_use_id (e.g., "calculator-123" -> "calculator")
+				const toolName = block.tool_use_id.split("-")[0]
+
+				// Handle string content
+				if (typeof block.content === "string") {
+					return {
+						functionResponse: {
+							name: toolName,
+							response: {
+								name: toolName,
+								content: block.content,
+							},
+						},
+					}
+				}
+
+				// Handle array content
+				if (Array.isArray(block.content)) {
+					const textParts: string[] = []
+					const imageParts: Part[] = []
+
+					block.content.forEach((item) => {
+						if (item.type === "text") {
+							textParts.push(item.text)
+						} else if (item.type === "image") {
+							if (item.source.type === "base64") {
+								imageParts.push({
+									inlineData: {
+										data: item.source.data,
+										mimeType: item.source.media_type,
+									},
+								})
+							}
+						}
+					})
+
+					// Create content text with a note about images if present
+					const contentText =
+						textParts.join("\n\n") +
+						(imageParts.length > 0
+							? (textParts.length > 0 ? "\n\n" : "\n\n") + "(See next part for image)"
+							: "")
+
+					// Return function response followed by any images
+					return [
+						{
+							functionResponse: {
+								name: toolName,
+								response: {
+									name: toolName,
+									content: contentText,
+								},
+							},
+						},
+						...imageParts,
+					]
+				}
+
+				return []
+			}
 			default:
 				throw new Error(`Unsupported content block type: ${block.type}`)
 		}