Add basic card tests

[hxtree]

This pull request adds basic tests for the BasicCard component.

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.14%	:white_check_mark: 66.67%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (8b14385bfaefeb2f02d225c38f0fd022d19d66ad) | 2222 | 1606 | 72.28% | | | Head commit (5313a2d52c9916ff82a4725510f6ea6077d6c520) | 2226 (+4) | 1612 (+6) | 72.42% (**+0.14%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#866) | 6 | 4 | **66.67%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

See your quality gate settings    Change summary preferences

_{You may notice some variations in coverage metrics with the latest Coverage engine update. For more details, visit the documentation}