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protobuf/protobuf.js/tests/api_enum.js

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+var tape = require("tape");
+
+var protobuf = require("..");
+
+tape.test("reflected enums", function(test) {
+
+    var enm = new protobuf.Enum("Test", {
+        a: 1,
+        b: 2
+    });
+
+    var enm_allow_alias = new protobuf.Enum( 'AliasTest',
+    { a: 0 }, { allow_alias: true } );
+
+    test.throws(function() {
+        new protobuf.Enum("Test", true);
+    }, TypeError, "should throw if values is specified but not an object");
+
+    test.same(enm.valuesById, {
+        1: "a",
+        2: "b"
+    }, "should also expose their values by id");
+
+    test.throws(function() {
+        enm.add(2, 2);
+    }, TypeError, "should throw if name is not a string");
+
+    test.throws(function() {
+        enm.add("c", 1.5);
+    }, TypeError, "should throw if id is not an integer");
+
+    test.throws(function() {
+        enm.add("b", 2);
+    }, Error, "should throw if name is a duplicate");
+
+    test.throws(function() {
+        enm.add("c", 2);
+    }, Error, "should throw if id is a duplicate, without allow_alias option");
+
+    enm.add("c", 3);
+    test.same(enm.values, {
+        a: 1,
+        b: 2,
+        c: 3
+    }, "should allow adding new values");
+    test.same(enm.valuesById, {
+        1: "a",
+        2: "b",
+        3: "c"
+    }, "should also expose any new values by id");
+
+    test.throws(function() {
+        enm.remove(1);
+    }, TypeError, "should throw if name is not a string");
+
+    test.throws(function() {
+        enm.remove("d");
+    }, Error, "should throw if name is not present");
+
+    enm.remove("b");
+    test.same(enm.values, {
+        a: 1,
+        c: 3
+    }, "should allow removing existing values");
+    test.same(enm.valuesById, {
+        1: "a",
+        3: "c"
+    }, "should no longer expose any removed values by id");
+
+    test.same(enm.toJSON(), {
+        values: {
+            a: 1,
+            c: 3
+        }
+    }, "should export values to JSON");
+
+    enm_allow_alias.add( 'b', 0 );
+    test.same( enm_allow_alias.values, {
+      a: 0,
+      b: 0
+    });
+
+    test.end();
+});