Add usage tests (test #722 fix)

test/0-test-usage.bats

@@ -0,0 +1,46 @@
+#! /usr/bin/env bats
+
+load '/bats-support/load.bash'
+load '/bats-assert/load.bash'
+load '/getssl/test/test_helper.bash'
+
+
+# This is run for every test
+teardown() {
+    [ -n "$BATS_TEST_COMPLETED" ] || touch $BATS_RUN_TMPDIR/failed.skip
+}
+
+setup() {
+    [ ! -f $BATS_RUN_TMPDIR/failed.skip ] || skip "skipping tests after first failure"
+    #export CURL_CA_BUNDLE=/root/pebble-ca-bundle.crt
+}
+
+
+@test "Run getssl without any arguments to verify the usage message is shown" {
+    if [ -n "$STAGING" ]; then
+        skip "Using staging server, skipping internal test"
+    fi
+    run ${CODE_DIR}/getssl
+    assert_line --partial "Usage: getssl"
+    assert_success
+}
+
+
+@test "Run getssl with --nocheck and verify the usage message is shown" {
+    if [ -n "$STAGING" ]; then
+        skip "Using staging server, skipping internal test"
+    fi
+    run ${CODE_DIR}/getssl --nocheck
+    assert_line --partial "Usage: getssl"
+    assert_success
+}
+
+
+@test "Run getssl with --upgrade and verify the usage message is NOT shown" {
+    if [ -n "$STAGING" ]; then
+        skip "Using staging server, skipping internal test"
+    fi
+    run ${CODE_DIR}/getssl --upgrade
+    refute_output
+    assert_success
+}