tests: migrate ops test to bats

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

tests/ops/exec/undefined/with_pkg_mandatory/cue.mod/module.cue

@@ -0,0 +1 @@
+module: "dagger.io/testing"

tests/ops/exec/undefined/with_pkg_mandatory/cue.mod/pkg/dagger.io/nonoptional/main.cue

@@ -0,0 +1,18 @@
+package nonoptional
+
+dang: string
+
+#up: [
+	{
+		do:  "fetch-container"
+		ref: "alpine"
+	},
+	{
+		do:  "exec"
+		dir: "/"
+		args: ["sh", "-c", """
+		echo "This test SHOULD fail, because this SHOULD be executed"
+		exit 1
+		"""]
+	},
+]

tests/ops/exec/undefined/with_pkg_mandatory/main.cue

@@ -0,0 +1,12 @@
+package testing
+
+import (
+	"dagger.io/nonoptional"
+)
+
+#up: [
+	{
+		do: "load",
+		from: nonoptional
+	},
+]