Add tests on docker.#Dockerfile

Signed-off-by: Vasek - Tom C <tom.chauveau@epitech.eu>

pkg/universe.dagger.io/docker/test/build-dockerfile-input.cue

@@ -0,0 +1,34 @@
+package test
+
+import (
+	"dagger.io/dagger"
+	"dagger.io/dagger/engine"
+	"universe.dagger.io/docker"
+)
+
+dagger.#Plan & {
+	inputs: directories: testdata: path: "./testdata"
+
+	actions: {
+		image: docker.#Build & {
+			steps: [
+				docker.#Dockerfile & {
+					input: rootfs: inputs.directories.testdata.contents
+				},
+				docker.#Run & {
+					always: true
+					script: """
+						hello >> /test.txt
+						"""
+				},
+			]
+		}
+
+		verify: engine.#ReadFile & {
+			input: image.output.rootfs
+			path:  "/test.txt"
+		} & {
+			contents: "hello world"
+		}
+	}
+}

pkg/universe.dagger.io/docker/test/build-dockerfile.cue

@@ -0,0 +1,37 @@
+package test
+
+import (
+	"dagger.io/dagger"
+	"dagger.io/dagger/engine"
+	"universe.dagger.io/docker"
+)
+
+dagger.#Plan & {
+	actions: {
+		build: docker.#Build & {
+			steps: [
+				docker.#Dockerfile & {
+					dockerfile: contents: """
+							FROM alpine:3.15
+
+							RUN echo -n hello world >> /test.txt
+						"""
+				},
+				docker.#Run & {
+					script: """
+						  # Verify that docker.#Dockerfile correctly connect output
+						  # into other steps
+							grep -q "hello world" /test.txt
+						"""
+				},
+			]
+		}
+
+		verify: engine.#ReadFile & {
+			input: build.output.rootfs
+			path:  "/test.txt"
+		} & {
+			contents: "hello world"
+		}
+	}
+}

pkg/universe.dagger.io/docker/test/testdata/Dockerfile

@@ -0,0 +1,19 @@
+###
+# STAGE: builder
+# Build a simple go program
+# GO TO STAGE: app
+###
+FROM golang:1.17-alpine as builder
+
+WORKDIR /app
+
+COPY go.mod .
+COPY main.go .
+
+RUN go build -o hello main.go
+
+FROM alpine:3.15@sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300
+
+COPY --from=builder /app/hello /bin/hello
+
+ENTRYPOINT ["hello"]

pkg/universe.dagger.io/docker/test/testdata/go.mod

@@ -0,0 +1,3 @@
+module test.com
+
+go 1.17

pkg/universe.dagger.io/docker/test/testdata/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Printf("hello world")
+}