resource/aws_lambda_function_event_invoke_config: Prevent unexpected …

…format of function resource error (#14851)

Output from acceptance testing:

```
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_Qualifier_FunctionName_Arn (55.47s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_basic (55.86s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_disappears_LambdaFunctionEventInvokeConfig (68.54s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_disappears_LambdaFunction (70.08s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_Qualifier_FunctionVersion (72.29s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_Qualifier_Latest (72.77s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_FunctionName_Arn (73.41s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_Qualifier_AliasName (73.64s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_DestinationConfig_Remove (80.41s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_MaximumEventAgeInSeconds (86.06s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_DestinationConfig_Swap (88.02s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_MaximumRetryAttempts (90.44s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_DestinationConfig_OnSuccess_Destination (102.11s)
--- PASS: TestAccAWSLambdaFunctionEventInvokeConfig_DestinationConfig_OnFailure_Destination (103.06s)
```

aws/resource_aws_lambda_function_event_invoke_config.go

@@ -289,7 +289,7 @@ func resourceAwsLambdaFunctionEventInvokeConfigParseId(id string) (string, strin
 			return id, "", nil
 		}
 
-		functionParts := strings.Split(id, ":")
+		functionParts := strings.Split(function, ":")
 
 		if len(functionParts) != 2 || functionParts[0] == "" || functionParts[1] == "" {
 			return "", "", fmt.Errorf("unexpected format of function resource (%s), expected name:qualifier", id)

aws/resource_aws_lambda_function_event_invoke_config_test.go

@@ -261,6 +261,33 @@ func TestAccAWSLambdaFunctionEventInvokeConfig_FunctionName_Arn(t *testing.T) {
 	})
 }
 
+func TestAccAWSLambdaFunctionEventInvokeConfig_Qualifier_FunctionName_Arn(t *testing.T) {
+	rName := acctest.RandomWithPrefix("tf-acc-test")
+	lambdaFunctionResourceName := "aws_lambda_function.test"
+	resourceName := "aws_lambda_function_event_invoke_config.test"
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckLambdaFunctionEventInvokeConfigDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAWSLambdaFunctionEventInvokeConfigQualifierFunctionNameArn(rName),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckAwsLambdaFunctionEventInvokeConfigExists(resourceName),
+					resource.TestCheckResourceAttrPair(resourceName, "function_name", lambdaFunctionResourceName, "arn"),
+					resource.TestCheckResourceAttr(resourceName, "qualifier", "$LATEST"),
+				),
+			},
+			{
+				ResourceName:      resourceName,
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func TestAccAWSLambdaFunctionEventInvokeConfig_MaximumEventAgeInSeconds(t *testing.T) {
 	rName := acctest.RandomWithPrefix("tf-acc-test")
 	resourceName := "aws_lambda_function_event_invoke_config.test"
@@ -681,6 +708,15 @@ resource "aws_lambda_function_event_invoke_config" "test" {
 `
 }
 
+func testAccAWSLambdaFunctionEventInvokeConfigQualifierFunctionNameArn(rName string) string {
+	return testAccAWSLambdaFunctionEventInvokeConfigBase(rName) + `
+resource "aws_lambda_function_event_invoke_config" "test" {
+  function_name = aws_lambda_function.test.arn
+  qualifier     = "$LATEST"
+}
+`
+}
+
 func testAccAWSLambdaFunctionEventInvokeConfigMaximumEventAgeInSeconds(rName string, maximumEventAgeInSeconds int) string {
 	return testAccAWSLambdaFunctionEventInvokeConfigBase(rName) + fmt.Sprintf(`
 resource "aws_lambda_function_event_invoke_config" "test" {