1 files changed, 53 insertions, 0 deletions

diff --git a/cli/internal/fs/hash_test.go b/cli/internal/fs/hash_test.go
new file mode 100644
index 0000000..dd2fa84
--- /dev/null
+++ b/cli/internal/fs/hash_test.go
@@ -0,0 +1,53 @@
+package fs
+
+import (
+	"testing"
+
+	"gotest.tools/v3/assert"
+)
+
+const _numOfRuns = 20
+
+func Test_HashObjectStability(t *testing.T) {
+	type TestCase struct {
+		name string
+		obj  interface{}
+	}
+	type complexStruct struct {
+		nested TaskOutputs
+		foo    string
+		bar    []string
+	}
+
+	testCases := []TestCase{
+		{
+			name: "task object",
+			obj: TaskOutputs{
+				Inclusions: []string{"foo", "bar"},
+				Exclusions: []string{"baz"},
+			},
+		},
+		{
+			name: "complex struct",
+			obj: complexStruct{
+				nested: TaskOutputs{
+					Exclusions: []string{"bar", "baz"},
+					Inclusions: []string{"foo"},
+				},
+				foo: "a",
+				bar: []string{"b", "c"},
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		expectedHash, err := HashObject(tc.obj)
+		assert.NilError(t, err, tc.name)
+
+		for n := 0; n < _numOfRuns; n++ {
+			hash, err := HashObject(tc.obj)
+			assert.NilError(t, err, tc.name)
+			assert.Equal(t, expectedHash, hash, tc.name)
+		}
+	}
+}