tests: implemented tasks tests for engine.#Push

Signed-off-by: Sam Alba <samalba@users.noreply.github.com>

tests/tasks.bats

@@ -14,6 +14,11 @@ setup() {
     "$DAGGER" --europa up ./pull_auth.cue
 }
 
+@test "task: #Push" {
+    cd "$TESTDIR"/tasks/push
+    "$DAGGER" --europa up ./push.cue
+}
+
 @test "task: #ReadFile" {
     cd "$TESTDIR"/tasks/readfile
     "$DAGGER" --europa up

tests/tasks/push/push.cue

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"strings"
+	"alpha.dagger.io/europa/dagger/engine"
+)
+
+engine.#Plan & {
+	inputs: secrets: dockerHubToken: envvar: "DOCKERHUB_TOKEN"
+
+	#auth: [{
+		target:   "daggerio/ci-test:private-pull"
+		username: "daggertest"
+		secret:   inputs.secrets.dockerHubToken.contents
+	}]
+
+	actions: {
+		randomString: {
+			baseImage: engine.#Pull & {
+				source: "alpine:3.15.0@sha256:e7d88de73db3d3fd9b2d63aa7f447a10fd0220b7cbf39803c803f2af9ba256b3"
+			}
+
+			image: engine.#Exec & {
+				input: baseImage.output
+				args: [
+					"sh", "-c", "echo -n $RANDOM > /output.txt",
+				]
+			}
+
+			outputFile: engine.#ReadFile & {
+				input: image.output
+				path:  "/output.txt"
+			}
+
+			output: outputFile.contents
+		}
+
+		// Push image with random content
+		push: engine.#Push & {
+			dest:  "daggerio/ci-test:\(randomString.output)"
+			input: randomString.image.output
+			config: Env: ["FOO=\(randomString.output)"]
+			auth: #auth
+		}
+
+		// Pull same image and check the content
+		pull: engine.#Pull & {
+			source: "daggerio/ci-test:\(randomString.output)"
+			auth:   #auth
+		} & {
+			// check digest
+			digest: strings.Split(push.result, "@")[1]
+			// check image config
+			config: {
+				Env: ["FOO=\(randomString.output)"]
+			}
+		}
+
+		pullOutputFile: engine.#ReadFile & {
+			input: pull.output
+			path:  "/output.txt"
+		}
+
+		// Check output file in the pulled image
+		pullContent: string & pullOutputFile.contents & randomString.contents
+	}
+}