test that computed maps are applied correctly

Verify that a computed map which is not correctly marked as unknown in
the plan is still applied correctly.

builtin/providers/test/resource_map.go

@@ -23,6 +23,16 @@ func testResourceMap() *schema.Resource {
 				Optional: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 			},
+			"map_values": {
+				Type:     schema.TypeMap,
+				Optional: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
+			"computed_map": {
+				Type:     schema.TypeMap,
+				Computed: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
 		},
 	}
 }
@@ -35,15 +45,20 @@ func testResourceMapCreate(d *schema.ResourceData, meta interface{}) error {
 	}
 
 	d.SetId("testId")
-	return nil
+	return testResourceMapRead(d, meta)
 }
 
 func testResourceMapRead(d *schema.ResourceData, meta interface{}) error {
+	var computedMap map[string]interface{}
+	if v, ok := d.GetOk("map_values"); ok {
+		computedMap = v.(map[string]interface{})
+	}
+	d.Set("computed_map", computedMap)
 	return nil
 }
 
 func testResourceMapUpdate(d *schema.ResourceData, meta interface{}) error {
-	return nil
+	return testResourceMapRead(d, meta)
 }
 
 func testResourceMapDelete(d *schema.ResourceData, meta interface{}) error {

builtin/providers/test/resource_map_test.go

@@ -30,3 +30,80 @@ resource "test_resource_map" "foobar" {
 		},
 	})
 }
+
+func TestResourceMap_computedMap(t *testing.T) {
+	resource.UnitTest(t, resource.TestCase{
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckResourceDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: `
+resource "test_resource_map" "foobar" {
+	name = "test"
+	map_of_three = {
+		one   = "one"
+		two   = "two"
+		empty = ""
+	}
+	map_values = {
+		a = "1"
+		b = "2"
+	}
+}`,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"test_resource_map.foobar", "computed_map.a", "1",
+					),
+					resource.TestCheckResourceAttr(
+						"test_resource_map.foobar", "computed_map.b", "2",
+					),
+				),
+			},
+			{
+				Config: `
+resource "test_resource_map" "foobar" {
+	name = "test"
+	map_of_three = {
+		one   = "one"
+		two   = "two"
+		empty = ""
+	}
+	map_values = {
+		a = "3"
+		b = "4"
+	}
+}`,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"test_resource_map.foobar", "computed_map.a", "3",
+					),
+					resource.TestCheckResourceAttr(
+						"test_resource_map.foobar", "computed_map.b", "4",
+					),
+				),
+			},
+			{
+				Config: `
+resource "test_resource_map" "foobar" {
+	name = "test"
+	map_of_three = {
+		one   = "one"
+		two   = "two"
+		empty = ""
+	}
+	map_values = {
+		a = "3"
+	}
+}`,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"test_resource_map.foobar", "computed_map.a", "3",
+					),
+					resource.TestCheckNoResourceAttr(
+						"test_resource_map.foobar", "computed_map.b",
+					),
+				),
+			},
+		},
+	})
+}