test: bake print compose file

Signed-off-by: CrazyMax <[email protected]>

Author: crazy-max

tests/bake.go

@@ -31,7 +31,8 @@ func bakeCmd(sb integration.Sandbox, opts ...cmdOpt) (string, error) {
 }
 
 var bakeTests = []func(t *testing.T, sb integration.Sandbox){
-	testBakePrint,
+	testBakePrintHCL,
+	testBakePrintCompose,
 	testBakeLocal,
 	testBakeLocalMulti,
 	testBakeRemote,
@@ -62,7 +63,7 @@ var bakeTests = []func(t *testing.T, sb integration.Sandbox){
 	testBakeCheckCallOutput,
 }
 
-func testBakePrint(t *testing.T, sb integration.Sandbox) {
+func testBakePrintHCL(t *testing.T, sb integration.Sandbox) {
 	dockerfile := []byte(`
 FROM busybox
 ARG HELLO
@@ -125,6 +126,70 @@ target "build" {
 `, stdout.String())
 }
 
+func testBakePrintCompose(t *testing.T, sb integration.Sandbox) {
+	dockerfile := []byte(`
+FROM busybox
+ARG HELLO
+RUN echo "Hello ${HELLO}"
+	`)
+	composefile := []byte(`
+services:
+  build:
+    build:
+      context: .
+      args:
+        HELLO: foo
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("compose.yml", composefile, 0600),
+		fstest.CreateFile("Dockerfile", dockerfile, 0600),
+	)
+
+	cmd := buildxCmd(sb, withDir(dir), withArgs("bake", "--print", "build"))
+	stdout := bytes.Buffer{}
+	stderr := bytes.Buffer{}
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+	require.NoError(t, cmd.Run(), stdout.String(), stderr.String())
+
+	var def struct {
+		Group  map[string]*bake.Group  `json:"group,omitempty"`
+		Target map[string]*bake.Target `json:"target"`
+	}
+	require.NoError(t, json.Unmarshal(stdout.Bytes(), &def))
+
+	require.Len(t, def.Group, 1)
+	require.Contains(t, def.Group, "default")
+
+	require.Equal(t, []string{"build"}, def.Group["default"].Targets)
+	require.Len(t, def.Target, 1)
+	require.Contains(t, def.Target, "build")
+	require.Equal(t, ".", *def.Target["build"].Context)
+	require.Equal(t, "Dockerfile", *def.Target["build"].Dockerfile)
+	require.Equal(t, map[string]*string{"HELLO": ptrstr("foo")}, def.Target["build"].Args)
+
+	require.Equal(t, `{
+  "group": {
+    "default": {
+      "targets": [
+        "build"
+      ]
+    }
+  },
+  "target": {
+    "build": {
+      "context": ".",
+      "dockerfile": "Dockerfile",
+      "args": {
+        "HELLO": "foo"
+      }
+    }
+  }
+}
+`, stdout.String())
+}
+
 func testBakeLocal(t *testing.T, sb integration.Sandbox) {
 	dockerfile := []byte(`
 FROM scratch