## Changes
- Add t.Helper() in testcli-related helpers, this ensures that output is
attributed correctly to test case and not to the helper.
- Modify testlcli.Run() to run process in foreground. This is needed for
t.Helper to work.
- Extend a few assertions with message to help attribute it to proper
helper where needed.
## Tests
Manually reviewed test output.
Before:
```
+ go test --timeout 3h -v -run TestDefaultPython/3.9 ./integration/bundle/
=== RUN TestDefaultPython
=== RUN TestDefaultPython/3.9
workspace.go:26: aws
golden.go:14: run args: [bundle, init, default-python, --config-file, config.json]
runner.go:206: [databricks stderr]:
runner.go:206: [databricks stderr]: Welcome to the default Python template for Databricks Asset Bundles!
...
testdiff.go:23:
Error Trace: /Users/denis.bilenko/work/cli/libs/testdiff/testdiff.go:23
/Users/denis.bilenko/work/cli/libs/testdiff/golden.go:43
/Users/denis.bilenko/work/cli/internal/testcli/golden.go:23
/Users/denis.bilenko/work/cli/integration/bundle/init_default_python_test.go:92
/Users/denis.bilenko/work/cli/integration/bundle/init_default_python_test.go:45
...
```
After:
```
+ go test --timeout 3h -v -run TestDefaultPython/3.9 ./integration/bundle/
=== RUN TestDefaultPython
=== RUN TestDefaultPython/3.9
init_default_python_test.go:51: CLOUD_ENV=aws
init_default_python_test.go:92: args: bundle, init, default-python, --config-file, config.json
init_default_python_test.go:92: stderr:
init_default_python_test.go:92: stderr: Welcome to the default Python template for Databricks Asset Bundles!
...
init_default_python_test.go:92:
Error Trace: /Users/denis.bilenko/work/cli/libs/testdiff/testdiff.go:24
/Users/denis.bilenko/work/cli/libs/testdiff/golden.go:46
/Users/denis.bilenko/work/cli/internal/testcli/golden.go:23
/Users/denis.bilenko/work/cli/integration/bundle/init_default_python_test.go:92
/Users/denis.bilenko/work/cli/integration/bundle/init_default_python_test.go:45
...
```
## Changes
The `Setenv` helper function configures an environment variable and
resets it to its original value when exiting the test scope. It is
incompatible with running tests in parallel because it modifies
process-wide state. The `libs/env` package defines functions to interact
with the environment but records `Setenv` calls on a `context.Context`.
This enables us to override/specialize the environment scoped to a
context.
Pre-requisites for removing the `t.Setenv` calls:
* Make `cmdio.NewIO` accept a context and use it with `libs/env`
* Make all `internal/testcli` functions use a context
The rest of this change:
* Modifies integration tests to initialize a context to use if there
wasn't already one
* Updates `t.Setenv` calls to use `env.Set`
## Tests
n/a
## Changes
The CLI test runner instantiates a new CLI "instance" through
`cmd.New()` and runs it with specified arguments. This is as close as we
get to running the real CLI **in-process**. This runner was located in
the `internal` package next to other helpers. This change moves it to
its own dedicated package.
Note: this runner transitively imports pretty much the entire
repository, which is why we intentionally keep it _separate_ from
`testutil`.
## Tests
n/a
Denis Bilenko
Pieter Noordhuis