test: tmp file from embed.FS

On-behalf-of: @SAP [email protected]
Signed-off-by: Christopher Junk <[email protected]>

Author: christophrj

go.mod

@@ -3,6 +3,7 @@ module github.com/openmcp-project/openmcp-testing
 go 1.25.2
 
 require (
+	github.com/stretchr/testify v1.10.0
 	github.com/vladimirvivien/gexe v0.4.1
 	k8s.io/api v0.34.2
 	k8s.io/apimachinery v0.34.2
@@ -16,6 +17,7 @@ require (
 	github.com/BurntSushi/toml v1.4.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	go.yaml.in/yaml/v2 v2.4.2 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect

internal/testdata/test.txt

@@ -0,0 +1 @@
+hello openmcp!

internal/util_test.go

@@ -0,0 +1,23 @@
+package internal
+
+import (
+	"bufio"
+	"embed"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+//go:embed testdata/test.txt
+var testFS embed.FS
+
+func TestMustTmpFileFromEmbedFS(t *testing.T) {
+	result := MustTmpFileFromEmbedFS(testFS, "testdata/test.txt")
+	file, err := os.Open(result)
+	require.NoError(t, err)
+	scanner := bufio.NewScanner(file)
+	require.True(t, scanner.Scan())
+	require.Equal(t, scanner.Text(), "hello openmcp!")
+	os.RemoveAll(result)
+}