test: add unit tests for resolveAgainstBase

pkg/unikontainers/resolve_test.go

@@ -0,0 +1,27 @@
+package unikontainers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestResolveAgainstBase(t *testing.T) {
+	t.Run("absolute path is returned as is", func(t *testing.T) {
+		result, err := resolveAgainstBase("/some/base", "/absolute/path")
+		assert.NoError(t, err)
+		assert.Equal(t, "/absolute/path", result)
+	})
+
+	t.Run("relative path is joined with absolute base", func(t *testing.T) {
+		result, err := resolveAgainstBase("/home/shreya", "documents/file.txt")
+		assert.NoError(t, err)
+		assert.Equal(t, "/home/shreya/documents/file.txt", result)
+	})
+
+	t.Run("relative path with relative base", func(t *testing.T) {
+		result, err := resolveAgainstBase("mybase", "myfile.txt")
+		assert.NoError(t, err)
+		assert.Contains(t, result, "mybase/myfile.txt")
+	})
+}