Add more acceptance tests

Tests functionality with the --schema-location flag, the
KUBEVAL_SCHEMA_LOCATION environment variable, and the --openshift flag

acceptance.bats

@@ -115,3 +115,43 @@
   run bin/kubeval --ignore-missing-schemas fixtures/test_crd.yaml
   [ "$status" -eq 0 ]
 }
+
+@test "Pass when using a valid --schema-location" {
+  run bin/kubeval fixtures/valid.yaml --schema-location https://kubernetesjsonschema.dev
+  [ "$status" -eq 0 ]
+}
+
+@test "Fail when using a faulty --schema-location" {
+  run bin/kubeval fixtures/valid.yaml --schema-location foo
+  [ "$status" -eq 1 ]
+}
+
+@test "Pass when using a valid KUBEVAL_SCHEMA_LOCATION variable" {
+  KUBEVAL_SCHEMA_LOCATION=https://kubernetesjsonschema.dev run bin/kubeval fixtures/valid.yaml
+  [ "$status" -eq 0 ]
+}
+
+@test "Fail when using a faulty KUBEVAL_SCHEMA_LOCATION variable" {
+  KUBEVAL_SCHEMA_LOCATION=foo run bin/kubeval fixtures/valid.yaml
+  [ "$status" -eq 1 ]
+}
+
+@test "Pass when using a valid --schema-location, which overrides a faulty KUBEVAL_SCHEMA_LOCATION variable" {
+  KUBEVAL_SCHEMA_LOCATION=foo run bin/kubeval fixtures/valid.yaml --schema-location https://kubernetesjsonschema.dev
+  [ "$status" -eq 0 ]
+}
+
+@test "Fail when using a faulty --schema-location, which overrides a valid KUBEVAL_SCHEMA_LOCATION variable" {
+  KUBEVAL_SCHEMA_LOCATION=https://kubernetesjsonschema.dev run bin/kubeval fixtures/valid.yaml --schema-location foo
+  [ "$status" -eq 1 ]
+}
+
+@test "Pass when using --openshift with a valid input" {
+  run bin/kubeval fixtures/valid.yaml --openshift
+  [ "$status" -eq 0 ]
+}
+
+@test "Fail when using --openshift with an invalid input" {
+  run bin/kubeval fixtures/invalid.yaml --openshift
+  [ "$status" -eq 1 ]
+}