Adds basic tests.

test/README.md

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+# Test Directory
+
+This directory is used for testing wild-cloud functionality using the Bats testing framework.
+
+## Contents
+- `test_helper.bash` - Shared Bats test setup and utilities
+- `test_helper/` - Bats framework extensions (bats-support, bats-assert)
+- `bats/` - Bats core framework (git submodule)
+- `fixtures/` - Test data and sample configuration files
+- `*.bats` - Bats test files for different components
+- `run_bats_tests.sh` - Runs the complete Bats test suite
+- `tmp/` - Temporary test projects (auto-created/cleaned)
+
+## Test Files
+
+### `test_common_functions.bats`
+Tests the core functions in `wild-common.sh`:
+- `find_wc_home()` - Project root detection
+- `init_wild_env()` - Environment setup
+- `check_wild_directory()` - Project validation
+- Print functions and utilities
+
+### `test_project_detection.bats`
+Tests project detection and script execution:
+- Script execution from various directory levels
+- Environment variable setup from different paths
+- Proper failure outside project directories
+
+### `test_config_functions.bats`
+Tests configuration and secret access:
+- `get_current_config()` function
+- `get_current_secret()` function
+- Configuration access from subdirectories
+- Fixture data usage
+
+## Running Tests
+
+```bash
+# Initialize git submodules (first time only)
+git submodule update --init --recursive
+
+# Run all Bats tests
+./run_bats_tests.sh
+
+# Run individual test files
+./bats/bin/bats test_common_functions.bats
+./bats/bin/bats test_project_detection.bats
+./bats/bin/bats test_config_functions.bats
+
+# Test from subdirectory (should work)
+cd deep/nested/path
+../../../bin/wild-cluster-node-up --help
+```
+
+## Fixtures
+
+The `fixtures/` directory contains:
+- `sample-config.yaml` - Complete test configuration
+- `sample-secrets.yaml` - Test secrets file
+
+## Adding New Tests
+
+1. Create `test_<feature>.bats` following the Bats pattern:
+   ```bash
+   #!/usr/bin/env bats
+   
+   load 'test_helper'
+   
+   setup() {
+       setup_test_project "feature-test"
+   }
+   
+   teardown() {
+       teardown_test_project "feature-test"
+   }
+   
+   @test "feature description" {
+       # Your test here using Bats assertions
+       run some_command
+       assert_success
+       assert_output "expected output"
+   }
+   ```
+
+2. Add test data to `fixtures/` if needed
+
+3. The Bats runner will automatically discover and run new tests
+
+## Common Test Functions
+
+From `test_helper.bash`:
+- `setup_test_project "name"` - Creates test project in `tmp/`
+- `teardown_test_project "name"` - Removes test project
+- `create_test_project "name" [with-config]` - Creates additional test projects
+- `remove_test_project "name"` - Removes additional test projects
+
+## Bats Assertions
+
+Available through bats-assert:
+- `assert_success` / `assert_failure` - Check command exit status
+- `assert_output "text"` - Check exact output
+- `assert_output --partial "text"` - Check output contains text
+- `assert_equal "$actual" "$expected"` - Check equality
+- `assert [ condition ]` - General assertions