Fix handling of choice statements in YangSchema

Now that I'm using `libyang::Context::get_node`, the code got a little
less complicated, since it always returns a Schema_Node instead of
a Set.

Change-Id: Iab3734ed4cb5957cb635f268b882963c95d36206
Issue: https://tree.taiga.io/project/jktjkt-netconf-cli/issue/119
diff --git a/tests/yang.cpp b/tests/yang.cpp
index 9c44008..156d94b 100644
--- a/tests/yang.cpp
+++ b/tests/yang.cpp
@@ -230,6 +230,25 @@
     }
 
     uses flags;
+
+    choice interface {
+        case caseLoopback {
+            container loopback {
+                leaf ip {
+                    type string;
+                }
+            }
+        }
+
+        case caseEthernet {
+            container ethernet {
+                leaf ip {
+                    type string;
+                }
+            }
+        }
+    }
+
 })";
 
 TEST_CASE("yangschema")
@@ -261,6 +280,18 @@
                 node.second = "a2";
             }
 
+            SECTION("example-schema:ethernet")
+            {
+                node.first = "example-schema";
+                node.second = "ethernet";
+            }
+
+            SECTION("example-schema:loopback")
+            {
+                node.first = "example-schema";
+                node.second = "loopback";
+            }
+
             REQUIRE(ys.isContainer(path, node));
         }
         SECTION("isLeaf")
@@ -649,7 +680,8 @@
                        "example-schema:foodIdentLeaf", "example-schema:pizzaIdentLeaf", "example-schema:foodDrinkIdentLeaf",
                        "example-schema:_list", "example-schema:twoKeyList", "second-schema:bla",
                        "example-schema:carry", "example-schema:zero", "example-schema:direction",
-                       "example-schema:interrupt"};
+                       "example-schema:interrupt",
+                       "example-schema:ethernet", "example-schema:loopback"};
             }
 
             SECTION("example-schema:a")
@@ -786,5 +818,39 @@
             REQUIRE(!ys.isLeaf(path, node));
             REQUIRE(!ys.isContainer(path, node));
         }
+
+        SECTION("choice is not a node")
+        {
+            SECTION("example-schema:interface")
+            {
+                node.first = "example-schema";
+                node.second = "interface";
+            }
+
+            REQUIRE(!ys.isPresenceContainer(path, node));
+            REQUIRE(!ys.isList(path, node));
+            REQUIRE(!ys.isLeaf(path, node));
+            REQUIRE(!ys.isContainer(path, node));
+        }
+
+        SECTION("case is not a node")
+        {
+            SECTION("example-schema:caseLoopback")
+            {
+                node.first = "example-schema";
+                node.second = "caseLoopback";
+            }
+
+            SECTION("example-schema:caseEthernet")
+            {
+                node.first = "example-schema";
+                node.second = "caseEthernet";
+            }
+
+            REQUIRE(!ys.isPresenceContainer(path, node));
+            REQUIRE(!ys.isList(path, node));
+            REQUIRE(!ys.isLeaf(path, node));
+            REQUIRE(!ys.isContainer(path, node));
+        }
     }
 }