Adding tests

Signed-off-by: dubo-dubon-duponey <dubodubonduponey+github@pm.me>

examples/tests/fetch-container/exist/main.cue

@@ -0,0 +1,48 @@
+package testing
+
+// XXX https://github.com/blocklayerhq/dagger/issues/10 requires that #dagger are nested under https://github.com/blocklayerhq/dagger/issues/21 makes this very hard to verify
+
+busybox1: {
+	#dagger: compute: [
+		{
+			do: "fetch-container"
+			ref: "busybox"
+		},
+	]
+}
+
+busybox2: {
+	#dagger: compute: [
+		{
+			do: "fetch-container"
+			ref: "busybox:latest"
+		},
+	]
+}
+
+busybox3: {
+	#dagger: compute: [
+		{
+			do: "fetch-container"
+			ref: "busybox:1.33-musl"
+		},
+	]
+}
+
+busybox4: {
+	#dagger: compute: [
+		{
+			do: "fetch-container"
+			ref: "busyboxa@sha256:e2af53705b841ace3ab3a44998663d4251d33ee8a9acaf71b66df4ae01c3bbe7"
+		},
+	]
+}
+
+busybox5: {
+	#dagger: compute: [
+		{
+			do: "fetch-container"
+			ref: "busybox:1.33-musl@sha256:e2af53705b841ace3ab3a44998663d4251d33ee8a9acaf71b66df4ae01c3bbe7"
+		},
+	]
+}