Function TestPackDropsStrayToolResultDespiteIDReuse

internal/ctx/ctx_test.go:435–459

TestPackDropsStrayToolResultDespiteIDReuse: dropOrphanTools is positional too. A stray tool result whose own (dangling, dropped) assistant reused an older turn's ID must not survive via that older assistant's issuance - it would land right after a user message and 400 strict backends.

(t *testing.T)

	}
}

// TestPackDropsStrayToolResultDespiteIDReuse: dropOrphanTools is positional
// too. A stray tool result whose own (dangling, dropped) assistant reused an
// older turn's ID must not survive via that older assistant's issuance - it
// would land right after a user message and 400 strict backends.
func TestPackDropsStrayToolResultDespiteIDReuse(t *testing.T) {
	history := []Message{
		{Role: RoleUser, Content: "task"},
		// Turn 1 completes with call_0.
		{Role: RoleAssistant, ToolCalls: []ToolCall{{ID: "call_0", Name: "bash"}}},
		{Role: RoleTool, ToolCallID: "call_0", Content: "ok"},
		{Role: RoleAssistant, Content: "done"},
		{Role: RoleUser, Content: "again"},
		// Turn 2 reuses call_0 in a parallel set and is aborted after one result.
		{Role: RoleAssistant, ToolCalls: []ToolCall{
			{ID: "call_0", Name: "bash"}, {ID: "call_1", Name: "bash"},
		}},
		{Role: RoleTool, ToolCallID: "call_0", Content: "partial"},
		{Role: RoleUser, Content: "next"},
	}
	r := Pack(history, 100000)
	for i, m := range r.Messages {
		if m.Role != RoleTool {
			continue
		}
		if i == 0 || r.Messages[i-1].Role == RoleUser || m.Content == "partial" {
			t.Fatalf("stray tool result survived via reused ID: %+v", r.Messages)
		}