1 files changed, 16 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/lazy/filter_map_spec.rb b/spec/ruby/core/enumerator/lazy/filter_map_spec.rb
new file mode 100644
index 0000000000..3480af0865
--- /dev/null
+++ b/spec/ruby/core/enumerator/lazy/filter_map_spec.rb
@@ -0,0 +1,16 @@
+# -*- encoding: us-ascii -*-
+
+require_relative '../../../spec_helper'
+require_relative 'fixtures/classes'
+
+ruby_version_is "2.7" do
+  describe "Enumerator::Lazy#filter_map" do
+    it "maps only truthy results" do
+      (1..Float::INFINITY).lazy.filter_map { |i| i if i.odd? }.first(4).should == [1, 3, 5, 7]
+    end
+
+    it "does not map false results" do
+      (1..Float::INFINITY).lazy.filter_map { |i| i.odd? ? i : false }.first(4).should == [1, 3, 5, 7]
+    end
+  end
+end