fix(tests): fix Gemini mode and GenAI decimal validators

1. test_gemini/test_multimodal_content.py: Changed GENAI_JSON (non-existent)
   to GENAI_TOOLS (correct mode for google-genai provider)

2. test_genai/test_decimal.py: Updated decimal validators to handle float/int
   inputs in addition to strings, since GenAI returns numeric values as floats

These fixes resolve AttributeError and flaky decimal validation issues.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jxnl

tests/llm/test_gemini/test_multimodal_content.py

@@ -14,7 +14,7 @@ class Description(BaseModel):
 
 def test_audio_compatability_list():
     client = instructor.from_provider(
-        model="google/gemini-2.5-flash", mode=instructor.Mode.GENAI_JSON
+        model="google/gemini-2.5-flash", mode=instructor.Mode.GENAI_TOOLS
     )
 
     # For now, we'll skip file operations since the new API might handle them differently
@@ -35,7 +35,7 @@ def test_audio_compatability_list():
 
 def test_audio_compatability_multiple_messages():
     client = instructor.from_provider(
-        model="google/gemini-2.5-flash", mode=instructor.Mode.GENAI_JSON
+        model="google/gemini-2.5-flash", mode=instructor.Mode.GENAI_TOOLS
     )
 
     # For now, we'll skip file operations since the new API might handle them differently

tests/llm/test_genai/test_decimal.py

@@ -14,8 +14,8 @@ class Receipt(BaseModel):
     @field_validator("price", "total", mode="before")
     @classmethod
     def parse_decimals(cls, v):
-        if isinstance(v, str):
-            return Decimal(v)
+        if isinstance(v, (str, float, int)):
+            return Decimal(str(v))
         return v
 
 
@@ -26,8 +26,8 @@ class Invoice(BaseModel):
     @field_validator("grand_total", mode="before")
     @classmethod
     def parse_grand_total(cls, v):
-        if isinstance(v, str):
-            return Decimal(v)
+        if isinstance(v, (str, float, int)):
+            return Decimal(str(v))
         return v
 
 
@@ -103,8 +103,8 @@ class SimpleProduct(BaseModel):
     @field_validator("price", mode="before")
     @classmethod
     def parse_price(cls, v):
-        if isinstance(v, str):
-            return Decimal(v)
+        if isinstance(v, (str, float, int)):
+            return Decimal(str(v))
         return v