Add the ability to get a list of databases

Author: lornajane

src/PHPCouchDB/Server.php

@@ -66,4 +66,21 @@ public function getVersion() : string
             }
         }
     }
+
+    /**
+     * Get a list of databases
+     *
+     * @return array The database names
+     */
+    public function getAllDbs() {
+        $response = $this->client->request("GET", "/_all_dbs");
+        if ($response->getStatusCode() == 200) {
+            // try to decode JSON
+            if ($json_data = json_decode($response->getBody(), true)) {
+                return $json_data;
+            } else {
+                throw new Exception('JSON response not received or not understood');
+            }
+        }
+    }
 }

tests/PHPCouchDB/ServerTest.php

@@ -46,4 +46,18 @@ public function testGetVersion() {
 		$this->assertEquals("1.6.0", $server->getVersion());
 
     }
+
+    public function testGetAllDbs() {
+        $dbs = ["test", "items"];
+        $response1 = new Response(200, [], json_encode($dbs));
+
+        $mock = new MockHandler([ $response1 ]);
+		$handler = HandlerStack::create($mock);
+		$client = new Client(['handler' => $handler]);
+
+		// userland code starts
+		$server = new \PHPCouchDB\Server(["client" => $client]);
+		$this->assertEquals($dbs, $server->getAllDbs());
+
+    }
 }