Merge pull request #45 from wp-cli/handle-old-syntax-gracefully

Test graceful handling of old config syntax

features/config-backcompat.feature

@@ -0,0 +1,41 @@
+Feature: Backwards compatibility
+
+  Scenario: wp config get --constant=<constant> --> wp config get <name> --type=constant
+    Given a WP install
+
+    When I run `wp config get --constant=DB_NAME`
+    Then STDOUT should be:
+      """
+      wp_cli_test
+      """
+
+  Scenario: wp config get --global=<global> --> wp config get <name> --type=variable
+    Given a WP install
+
+    When I run `wp config get --global=table_prefix`
+    Then STDOUT should be:
+      """
+      wp_
+      """
+
+  Scenario: wp config get --> wp config list
+    Given an empty directory
+    And WP files
+
+    When I run `wp core config {CORE_CONFIG_SETTINGS}`
+    Then STDOUT should contain:
+      """
+      Generated 'wp-config.php' file.
+      """
+
+    When I run `wp config get --fields=name,type`
+    Then STDOUT should be a table containing rows:
+      | name               | type     |
+      | DB_NAME            | constant |
+      | DB_USER            | constant |
+      | DB_PASSWORD        | constant |
+      | DB_HOST            | constant |
+
+    When I try `wp config get`
+    Then STDOUT should be a table containing rows:
+      | name | value | type |