Before: Save g:ale_rust_cargo_use_check Save g:ale_rust_cargo_check_all_targets unlet! g:ale_rust_cargo_use_check unlet! g:ale_cargo_check_all_targets runtime ale_linters/rust/cargo.vim call ale#test#SetDirectory('/testplugin/test/command_callback') let g:suffix = ' --frozen --message-format=json -q' After: Restore unlet! g:suffix call ale#test#RestoreDirectory() call ale#linter#Reset() call ale#semver#ResetVersionCache() Execute(An empty string should be returned for the cargo executable when there's no Cargo.toml file): AssertEqual \ '', \ ale_linters#rust#cargo#GetCargoExecutable(bufnr('')) Execute(The executable should be returned when there is a Cargo.toml file): call ale#test#SetFilename('cargo_paths/test.rs') AssertEqual \ 'cargo', \ ale_linters#rust#cargo#GetCargoExecutable(bufnr('')) Execute(The VersionCheck function should return the --version command): AssertEqual \ 'cargo --version', \ ale_linters#rust#cargo#VersionCheck(bufnr('')) Execute(The default command should be correct): AssertEqual \ 'cargo build' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) Execute(`cargo check` should be used when the version is new enough): AssertEqual \ 'cargo check' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), [ \ 'cargo 0.17.0 (3423351a5 2017-10-06)', \ ]) " We should cache the version check AssertEqual \ 'cargo check' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) AssertEqual '', ale_linters#rust#cargo#VersionCheck(bufnr('')) Execute(`cargo build` should be used when cargo is too old): AssertEqual \ 'cargo build' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), [ \ 'cargo 0.16.0 (3423351a5 2017-10-06)', \ ]) " We should cache the version check AssertEqual \ 'cargo build' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) AssertEqual '', ale_linters#rust#cargo#VersionCheck(bufnr('')) Execute(`cargo build` should be used when g:ale_rust_cargo_use_check is set to 0): let g:ale_rust_cargo_use_check = 0 AssertEqual \ 'cargo build' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), [ \ 'cargo 0.24.0 (3423351a5 2017-10-06)', \ ]) " We should cache the version check AssertEqual \ 'cargo build' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) AssertEqual '', ale_linters#rust#cargo#VersionCheck(bufnr('')) Execute(`cargo check --all-targets` should be used when the version is new enough): AssertEqual \ 'cargo check --all-targets' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), [ \ 'cargo 0.22.0 (3423351a5 2017-10-06)', \ ]) " We should cache the version check AssertEqual \ 'cargo check --all-targets' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) AssertEqual '', ale_linters#rust#cargo#VersionCheck(bufnr('')) Execute(--all-targets should not be used when g:ale_rust_cargo_check_all_targets is set to 0): let g:ale_rust_cargo_check_all_targets = 0 AssertEqual \ 'cargo check' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), [ \ 'cargo 0.22.0 (3423351a5 2017-10-06)', \ ]) " We should cache the version check AssertEqual \ 'cargo check' . g:suffix, \ ale_linters#rust#cargo#GetCommand(bufnr(''), []) AssertEqual '', ale_linters#rust#cargo#VersionCheck(bufnr(''))