Export tests

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

examples/tests/export/withvalidation/main.cue

@@ -0,0 +1,30 @@
+package testing
+
+test: {
+	string
+	=~ "^some.+"
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "alpine"
+			},
+			{
+				do: "exec"
+				args: ["sh", "-c", """
+				printf something > /tmp/out
+				"""
+				]
+				// XXX Blocked by https://github.com/blocklayerhq/dagger/issues/19
+				dir: "/"
+			},
+			{
+				do: "export"
+				// Source path in the container
+				source: "/tmp/out"
+				format: "string"
+			},
+		]
+	}
+}