helper/schema: tests that all pass as I was trying to track down a bug

helper/schema/resource_data_test.go

@@ -2593,6 +2593,108 @@ func TestResourceDataState(t *testing.T) {
 				},
 			},
 		},
+
+		// #25
+		{
+			Schema: map[string]*Schema{
+				"ports": &Schema{
+					Type:     TypeSet,
+					Optional: true,
+					Computed: true,
+					Elem:     &Schema{Type: TypeInt},
+					Set: func(a interface{}) int {
+						return a.(int)
+					},
+				},
+			},
+
+			State: nil,
+
+			Diff: nil,
+
+			Set: map[string]interface{}{
+				"ports": []interface{}{},
+			},
+
+			Result: &terraform.InstanceState{
+				Attributes: map[string]string{
+					"ports.#": "0",
+				},
+			},
+		},
+
+		// #26
+		{
+			Schema: map[string]*Schema{
+				"ports": &Schema{
+					Type:     TypeList,
+					Optional: true,
+					Computed: true,
+					Elem:     &Schema{Type: TypeInt},
+				},
+			},
+
+			State: nil,
+
+			Diff: nil,
+
+			Set: map[string]interface{}{
+				"ports": []interface{}{},
+			},
+
+			Result: &terraform.InstanceState{
+				Attributes: map[string]string{
+					"ports.#": "0",
+				},
+			},
+		},
+
+		// #27 Set lists
+		{
+			Schema: map[string]*Schema{
+				"ports": &Schema{
+					Type:     TypeList,
+					Optional: true,
+					Computed: true,
+					Elem: &Resource{
+						Schema: map[string]*Schema{
+							"index": &Schema{Type: TypeInt},
+							"uuids": &Schema{Type: TypeMap},
+						},
+					},
+				},
+			},
+
+			State: nil,
+
+			Diff: &terraform.InstanceDiff{
+				Attributes: map[string]*terraform.ResourceAttrDiff{
+					"ports.#": &terraform.ResourceAttrDiff{
+						NewComputed: true,
+					},
+				},
+			},
+
+			Set: map[string]interface{}{
+				"ports": []interface{}{
+					map[string]interface{}{
+						"index": 10,
+						"uuids": map[string]interface{}{
+							"80": "value",
+						},
+					},
+				},
+			},
+
+			Result: &terraform.InstanceState{
+				Attributes: map[string]string{
+					"ports.#":          "1",
+					"ports.0.index":    "10",
+					"ports.0.uuids.#":  "1",
+					"ports.0.uuids.80": "value",
+				},
+			},
+		},
 	}
 
 	for i, tc := range cases {

helper/schema/schema_test.go

@@ -2140,6 +2140,31 @@ func TestSchemaMap_Diff(t *testing.T) {
 
 			Err: false,
 		},
+
+		// #55 - Unset list in state, should not show up computed
+		{
+			Schema: map[string]*Schema{
+				"metadata_keys": &Schema{
+					Type:     TypeList,
+					Optional: true,
+					Computed: true,
+					ForceNew: true,
+					Elem:     &Schema{Type: TypeInt},
+				},
+			},
+
+			State: &terraform.InstanceState{
+				Attributes: map[string]string{
+					"metadata_keys.#": "0",
+				},
+			},
+
+			Config: map[string]interface{}{},
+
+			Diff: nil,
+
+			Err: false,
+		},
 	}
 
 	for i, tc := range cases {