test: TestVolume_MergeLastWin

pkg/domain/dockerCompose/config_test.go

@@ -919,3 +919,46 @@ func TestVolume_Equal(t *testing.T) {
 		require.Equal(testCase.expectedResult, testCase.equalableA.Equal(testCase.equalableB), "Failed test case %v", i)
 	}
 }
+
+func TestVolume_MergeLastWin(t *testing.T) {
+	require := require.New(t)
+
+	testCases := []struct {
+		volumeA        *dockerCompose.Volume
+		volumeB        *dockerCompose.Volume
+		expectedVolume *dockerCompose.Volume
+	}{
+		{
+			volumeA:        &dockerCompose.Volume{},
+			volumeB:        nil,
+			expectedVolume: &dockerCompose.Volume{},
+		},
+		{
+			volumeA: &dockerCompose.Volume{
+				External: true,
+			},
+			volumeB: &dockerCompose.Volume{
+				External: true,
+			},
+			expectedVolume: &dockerCompose.Volume{
+				External: true,
+			},
+		},
+		{
+			volumeA: &dockerCompose.Volume{
+				External: true,
+			},
+			volumeB: &dockerCompose.Volume{
+				External: false,
+			},
+			expectedVolume: &dockerCompose.Volume{
+				External: false,
+			},
+		},
+	}
+
+	for i, testCase := range testCases {
+		testCase.volumeA.MergeLastWin(testCase.volumeB)
+		require.Equal(testCase.expectedVolume, testCase.volumeA, "Failed test case %v", i)
+	}
+}