added test case for change in cost

Signed-off-by: nickcurie <ncurie@kubecost.com>

pkg/kubecost/diff_test.go

@@ -31,74 +31,61 @@ func TestDiff(t *testing.T) {
 	cases := map[string]struct {
 		inputAssetsBefore []Asset
 		inputAssetsAfter  []Asset
-		test              []Node
-		costChange        []int
 		expected          map[string]Diff[Asset]
 	}{
 		"added node": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{node1, node2, node3},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node3Key: {node3, DiffAdded}},
 		},
 		"multiple adds": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{node1, node2, node3, node4},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node3Key: {node3, DiffAdded}, node4Key: {node4, DiffAdded}},
 		},
 		"removed node": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node1Key: {node1, DiffRemoved}},
 		},
 		"multiple removes": {
 			inputAssetsBefore: []Asset{node1, node2, node3},
 			inputAssetsAfter:  []Asset{node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node1Key: {node1, DiffRemoved}, node3Key: {node3, DiffRemoved}},
 		},
 		"remove all": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node1Key: {node1, DiffRemoved}, node2Key: {node2, DiffRemoved}},
 		},
 		"add and remove": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{node2, node3},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{node1Key: {node1, DiffRemoved}, node3Key: {node3, DiffAdded}},
 		},
 		"no change": {
 			inputAssetsBefore: []Asset{node1, node2},
 			inputAssetsAfter:  []Asset{node1, node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{},
 		},
 		"order switch": {
 			inputAssetsBefore: []Asset{node2, node1},
 			inputAssetsAfter:  []Asset{node1, node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{},
 		},
 		"disk add": {
 			inputAssetsBefore: []Asset{disk1, node1},
 			inputAssetsAfter:  []Asset{disk1, node1, disk2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{disk2Key: {disk2, DiffAdded}},
 		},
 		"disk and node add": {
 			inputAssetsBefore: []Asset{disk1, node1},
 			inputAssetsAfter:  []Asset{disk1, node1, disk2, node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{disk2Key: {disk2, DiffAdded}, node2Key: {node2, DiffAdded}},
 		},
 		"disk and node removed": {
 			inputAssetsBefore: []Asset{disk1, node1, disk2, node2},
 			inputAssetsAfter:  []Asset{disk2, node2},
-			costChange:        []int{},
 			expected:          map[string]Diff[Asset]{disk1Key: {disk1, DiffRemoved}, node1Key: {node1, DiffRemoved}},
 		},
 		"cost change": {