add a couple of tests for toml utils package

utils/toml/toml.go

@@ -36,8 +36,10 @@ func SaveStructAsToml(v any, dirName, name string) (string, error) {
 		}
 	}
 	filePath := fmt.Sprintf("%s/%s.toml", fileDir, name)
-	f, _ := toml.Marshal(v)
-	err = os.WriteFile(filePath, f, 0600)
+	f, err := toml.Marshal(v)
+	if err != nil {
+		return "", err
+	}
 
-	return filePath, err
+	return filePath, os.WriteFile(filePath, f, 0600)
 }

utils/toml/toml_test.go

@@ -0,0 +1,89 @@
+package toml
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/smartcontractkit/chainlink-testing-framework/utils/ptr"
+)
+
+func TestItSavesStructToTomlAndReadsIt(t *testing.T) {
+	type someStruct struct {
+		Hello string            `toml:"hello"`
+		Yolo  map[string]string `toml:"yolo"`
+		Laika *string           `toml:"laika"`
+		Mir   *string           `toml:"mir"`
+	}
+	testStruct := someStruct{
+		Hello: "World",
+		Yolo: map[string]string{
+			"yolo": "swag",
+		},
+		Mir: ptr.Ptr("Mir"),
+	}
+
+	t.Cleanup(func() {
+		os.Remove("test/test.toml")
+		os.Remove("test")
+		os.Remove("test.toml")
+	})
+
+	filePath, err := SaveStructAsToml(testStruct, "test", "test")
+	require.NoError(t, err, "failed to save struct as toml")
+
+	var readStruct someStruct
+	err = OpenTomlFileAsStruct(filePath, &readStruct)
+	require.NoError(t, err, "failed to read toml file")
+
+	require.Equal(t, testStruct, readStruct, "read struct is not equal to original struct")
+
+	//save to current folder
+	filePath, err = SaveStructAsToml(testStruct, "", "test")
+	require.NoError(t, err, "failed to save struct as toml")
+
+	err = OpenTomlFileAsStruct(filePath, &readStruct)
+	require.NoError(t, err, "failed to read toml file")
+
+	require.Equal(t, testStruct, readStruct, "read struct is not equal to original struct")
+}
+
+func TestItOverridesExistingFile(t *testing.T) {
+	type someStruct struct {
+		Hello string            `toml:"hello"`
+		Yolo  map[string]string `toml:"yolo"`
+		Laika *string           `toml:"laika"`
+		Mir   *string           `toml:"mir"`
+	}
+	testStruct := someStruct{
+		Hello: "World",
+		Yolo: map[string]string{
+			"yolo": "swag",
+		},
+		Mir: ptr.Ptr("Mir"),
+	}
+
+	t.Cleanup(func() {
+		os.Remove("test.toml")
+	})
+
+	err := os.WriteFile("test.toml", []byte("mietek"), 0600)
+	require.NoError(t, err, "failed to create test file")
+
+	filePath, err := SaveStructAsToml(testStruct, "", "test")
+	require.NoError(t, err, "failed to save struct as toml")
+
+	var readStruct someStruct
+	err = OpenTomlFileAsStruct(filePath, &readStruct)
+	require.NoError(t, err, "failed to read toml file")
+
+	require.Equal(t, testStruct, readStruct, "read struct is not equal to original struct")
+}
+
+func TestItReturnsErrorWhenOpeningNonExistent(t *testing.T) {
+	var readStruct struct{}
+	err := OpenTomlFileAsStruct("nonexistent.toml", &readStruct)
+	require.Error(t, err, "should return error when opening nonexistent file")
+	require.Contains(t, err.Error(), "no such file or directory", "should return correct error when opening nonexistent file")
+}