# Create basic modules and work space.
env TESTGO_VERSION=go1.50
mkdir m1_22_0
go mod init -C m1_22_0
go mod edit -C m1_22_0 -go=1.22.0 -toolchain=go1.99.0
mkdir m1_22_1
go mod init -C m1_22_1
go mod edit -C m1_22_1 -go=1.22.1 -toolchain=go1.99.1
mkdir m1_24_rc0
go mod init -C m1_24_rc0
go mod edit -C m1_24_rc0 -go=1.24rc0 -toolchain=go1.99.2

go work init ./m1_22_0 ./m1_22_1
cat go.work
grep '^go 1.48.0$' go.work
! grep toolchain go.work

# work sync with older modules should leave go 1.48.0 in the go.work.
go work sync
cat go.work
grep '^go 1.48.0$' go.work
! grep toolchain go.work

# work sync with newer modules should update go 1.21 -> 1.22.1 and toolchain -> go1.22.9 in go.work
env TESTGO_VERSION=go1.21
env TESTGO_VERSION_SWITCH=switch
go work edit -go=1.21
grep '^go 1.21$' go.work
! grep toolchain go.work
env GOTOOLCHAIN=local
! go work sync
stderr '^go: cannot load module m1_22_0 listed in go.work file: m1_22_0'${/}'go.mod requires go >= 1.22.0 \(running go 1.21; GOTOOLCHAIN=local\)$'
stderr '^go: cannot load module m1_22_1 listed in go.work file: m1_22_1'${/}'go.mod requires go >= 1.22.1 \(running go 1.21; GOTOOLCHAIN=local\)$'
env GOTOOLCHAIN=auto
go work sync
stderr '^go: m1_22_1'${/}'go.mod requires go >= 1.22.1; switching to go1.22.9$'
grep '^go 1.22.1$' go.work
! grep toolchain go.work

# work sync with newer modules should update go 1.22.1 -> 1.24rc1 and drop toolchain
go work edit -use=./m1_24_rc0
go work sync
stderr '^go: m1_24_rc0'${/}'go.mod requires go >= 1.24rc0; switching to go1.24rc1$'
cat go.work
grep '^go 1.24rc0$' go.work
! grep toolchain go.work
