Add tests for new functionality

Author: michael.biriley@firstaml.com

tests/checkout.bats

@@ -0,0 +1,47 @@
+#!/usr/bin/env bats
+
+setup() {
+  load "${BATS_PLUGIN_PATH}/load.bash"
+
+  # Uncomment to enable stub debugging
+  # export CURL_STUB_DEBUG=/dev/tty
+
+  # you can set variables common to all tests here
+  export BUILDKITE_PLUGIN_SPARSE_CHECKOUT_PATHS="default_path"
+  export BUILDKITE_REPO_SSH_HOST="default_host"
+  export BUILDKITE_COMMIT="dummy-commit-hash"
+}
+
+@test "Skip ssh-keyscan when option provided" {
+  export BUILDKITE_PLUGIN_SPARSE_CHECKOUT_SKIP_SSH_KEYSCAN='true'
+
+  stub git "clean \* : echo 'git clean'"
+  stub git "fetch --depth 1 origin \* : echo 'git fetch'"
+  stub git "sparse-checkout set \* \* : echo 'git sparse-checkout'" 
+  stub git "checkout \* : echo 'checkout'"
+
+  run "$PWD"/hooks/checkout
+
+  assert_success
+  assert_output --partial 'Skipped SSH keyscan'
+
+  unstub git
+}
+
+@test "Run ssh-keyscan when no option provided" {
+  unset BUILDKITE_PLUGIN_SPARSE_CHECKOUT_SKIP_SSH_KEYSCAN
+  
+  stub ssh-keyscan "\* : echo 'keyscan'"
+  stub git "clean \* : echo 'git clean'"
+  stub git "fetch --depth 1 origin \* : echo 'git fetch'"
+  stub git "sparse-checkout set \* \* : echo 'git sparse-checkout'" 
+  stub git "checkout \* : echo 'checkout'"
+
+  run "$PWD"/hooks/checkout
+
+  assert_success
+  assert_output --partial 'Scanning SSH keys for remote git repository'
+  
+  unstub git
+  unstub ssh-keyscan
+}