* provider/aws: Add data source for aws_elasticache_cluster
Fixes: #11445
* provider/aws: Add acceptance tests for aws_elasticache_cluster data source
* provider/aws: Add documentation for the aws_elasticache_cluster datasource
Initial tests were failing as follows:
```
=== RUN TestAccAWSElasticacheCluster_importBasic
--- FAIL: TestAccAWSElasticacheCluster_importBasic (362.66s)
testing.go:265: Step 1 error: ImportStateVerify attributes not
equivalent. Difference is shown below. Top is actual, bottom is
expected.
(map[string]string) {
}
(map[string]string) (len=2) {
(string) (len=20) "parameter_group_name": (string) (len=20)
"default.memcached1.4",
(string) (len=22) "security_group_names.#":
(string) (len=1) "0"
}
FAIL
exit status 1
```
The import of ElastiCache clusters helped to point out 3 things:
1. Currently, we were trying to set the parameter_group_name as follows:
```
d.Set("parameter_group_name", c.CacheParameterGroup)
```
Unfortunately, c.CacheParameterGroup is a struct not a string. This was
causing the test import failure. So this had to be replaced as follows:
```
if c.CacheParameterGroup != nil {
d.Set("parameter_group_name", c.CacheParameterGroup.CacheParameterGroupName)
}
```
2. We were trying to set the security_group_names as follows:
```
d.Set("security_group_names", c.CacheSecurityGroups)
```
The CacheSecurityGroups was actually a []* so had to be changed to work
as follows:
```
if len(c.CacheSecurityGroups) > 0 {
d.Set("security_group_names",
flattenElastiCacheSecurityGroupNames(c.CacheSecurityGroups))
}
```
3. We were trying to set the security_group_ids as follows:
```
d.Set("security_group_ids", c.SecurityGroups)
```
This is another []* and needs to be changed as follows:
```
if len(c.SecurityGroups) > 0 {
d.Set("security_group_ids",
flattenElastiCacheSecurityGroupIds(c.SecurityGroups))
}
```
This then allows the import test to pass as expected:
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSElasticacheCluster_importBasic'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2016/09/23 10:59:01 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSElasticacheCluster_importBasic -timeout 120m
=== RUN TestAccAWSElasticacheCluster_importBasic
--- PASS: TestAccAWSElasticacheCluster_importBasic (351.96s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 351.981s
```
As a final test, I ran the basic ElastiCache cluster creation to make
sure all passed as expected:
```
% make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSElasticacheCluster_basic'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2016/09/23 11:05:51 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSElasticacheCluster_basic -timeout 120m
=== RUN TestAccAWSElasticacheCluster_basic
--- PASS: TestAccAWSElasticacheCluster_basic (809.25s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 809.267s
```
Set Elasticache Port number to not be set by default, and require
Elasticache Port number to be specified.
Also updated acceptance tests to supply port number upon resource
declaration
Fixes#2084
- rename test to have _basic suffix, so we can run it individually
- use us-east-1 for basic test, since that's probably the only region that has
Classic
- update the indexing of nodes; cache nodes are 4 digits
Needs to wait for len(cluster.CacheNodes) == cluster.NumCacheNodes, since
apparently that takes a bit of time and the initial response always has
an empty collection of nodes
Paul Stack