# The CLI appends one typed parameter across source and test callers, preserves unrelated bytes, and refuses unsafe bindings without writes.
exec semedit refactor-change-signature --file service.go --symbol transform --parameters '[{"source_index":0,"parameter":{"name":"id","type":"int"}},{"parameter":{"name":"ctx","type":"*int"},"argument":"nil"}]'
stdout 'Updated the function signature and every proven direct caller.'
cmp service.go .scratch/want/service.txt
cmp callers.go .scratch/want/callers.txt
cmp other.go .scratch/want/other.txt
cmp service_test.go .scratch/want/service_test.txt
cmp odd.go .scratch/want/odd.txt
exec go test ./...
exec semedit refactor-change-signature --file service.go --symbol transform --parameters '[{"source_index":0,"parameter":{"name":"id","type":"int"}},{"source_index":1,"parameter":{"name":"ctx","type":"*int"}}]'
stdout 'already present'
cmp service.go .scratch/want/service.txt
cp service.go .scratch/transform.txt
exec semedit refactor-change-signature --file service.go --symbol noop --parameters '[]'
stdout 'already present'
cmp service.go .scratch/transform.txt
! exec semedit refactor-change-signature --file service.go --symbol indirect --parameters '[{"source_index":0,"parameter":{"name":"id","type":"int"}},{"parameter":{"name":"enabled","type":"bool"},"argument":"true"}]'
stderr 'function values and indirect callers are unsupported'
cmp service.go .scratch/transform.txt
cp callers.go .scratch/callers.txt
! exec semedit refactor-change-signature --file service.go --symbol usesGlobal --parameters '[{"source_index":0,"parameter":{"name":"id","type":"int"}},{"parameter":{"name":"globalValue","type":"int"},"argument":"0"}]'
stderr 'conflicts with an existing body binding'
cmp callers.go .scratch/callers.txt
-- go.mod --
module example.com/signaturecli

go 1.24
-- service.go --
package sample

func transform(id int) int { return id + 1 }

func indirect(id int) int { return id }

var indirectValue = indirect

var globalValue = 2

func usesGlobal(id int) int { return globalValue + id }
func noop() {}
-- callers.go --
package sample

func first() int { return transform(1) }
-- other.go --
package sample

func second() int { return transform(2) }
-- service_test.go --
package sample

import "testing"

func TestTransform(t *testing.T) {
	if got := transform(3); got != 4 {
		t.Fatalf("transform(3) = %d, want 4", got)
	}
	if got := usesGlobal(1); got != 3 {
		t.Fatalf("usesGlobal(1) = %d, want 3", got)
	}
}
-- odd.go --
package sample

func unrelated( )int{return 9}
-- .scratch/want/service.txt --
package sample

func transform(id int, ctx *int) int { return id + 1 }

func indirect(id int) int { return id }

var indirectValue = indirect

var globalValue = 2

func usesGlobal(id int) int { return globalValue + id }
func noop() {}
-- .scratch/want/callers.txt --
package sample

func first() int { return transform(1, nil) }
-- .scratch/want/other.txt --
package sample

func second() int { return transform(2, nil) }
-- .scratch/want/service_test.txt --
package sample

import "testing"

func TestTransform(t *testing.T) {
	if got := transform(3, nil); got != 4 {
		t.Fatalf("transform(3) = %d, want 4", got)
	}
	if got := usesGlobal(1); got != 3 {
		t.Fatalf("usesGlobal(1) = %d, want 3", got)
	}
}
-- .scratch/want/odd.txt --
package sample

func unrelated( )int{return 9}