## 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
Using an interface instead of a concrete type means we can pass
`*testing.T` directly or any wrapper type that implements a superset of
this interface. It prepares for more broad use of `acc.WorkspaceT`,
which enhances the testing object with helper functions for using a
Databricks workspace.
This eliminates the need to dereference a `*testing.T` field on a
wrapper type.
## Tests
n/a
Denis Bilenko
Pieter Noordhuis