From 5185a7a5c83220b97889148f2fe33426bc3e06e9 Mon Sep 17 00:00:00 2001
From: Brandon Fish <brandon.j.fish@oracle.com>
Date: Fri, 19 Nov 2021 15:06:00 -0600
Subject: [PATCH] Implement GC.{measure_total_time, total_time} and update
 GC.stat to update provided hash

---
 core/gc/measure_total_time_spec.rb | 19 +++++++++++++++++++
 core/gc/stat_spec.rb               |  8 ++++++++
 core/gc/total_time_spec.rb         | 15 +++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 core/gc/measure_total_time_spec.rb
 create mode 100644 core/gc/total_time_spec.rb

diff --git a/core/gc/measure_total_time_spec.rb b/core/gc/measure_total_time_spec.rb
new file mode 100644
index 0000000000..05d4598ebc
--- /dev/null
+++ b/core/gc/measure_total_time_spec.rb
@@ -0,0 +1,19 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "3.1" do
+  describe "GC.measure_total_time" do
+    before :each do
+      @default = GC.measure_total_time
+    end
+
+    after :each do
+      GC.measure_total_time = @default
+    end
+
+    it "can set and get a boolean value" do
+      original = GC.measure_total_time
+      GC.measure_total_time = !original
+      GC.measure_total_time.should == !original
+    end
+  end
+end
diff --git a/core/gc/stat_spec.rb b/core/gc/stat_spec.rb
index 8c2eb5488d..3b43b28a92 100644
--- a/core/gc/stat_spec.rb
+++ b/core/gc/stat_spec.rb
@@ -51,4 +51,12 @@
     GC.stat(:total_allocated_objects).should be_kind_of(Integer)
     GC.stat[:total_allocated_objects].should be_kind_of(Integer)
   end
+
+  it "raises an error if argument is not nil, a symbol, or a hash" do
+    -> { GC.stat(7) }.should raise_error(TypeError, "non-hash or symbol given")
+  end
+
+  it "raises an error if an unknown key is given" do
+    -> { GC.stat(:foo) }.should raise_error(ArgumentError, "unknown key: foo")
+  end
 end
diff --git a/core/gc/total_time_spec.rb b/core/gc/total_time_spec.rb
new file mode 100644
index 0000000000..9b4f16e603
--- /dev/null
+++ b/core/gc/total_time_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "3.1" do
+  describe "GC.total_time" do
+    it "returns an Integer" do
+      GC.total_time.should be_kind_of(Integer)
+    end
+
+    it "increases as collections are run" do
+      time_before = GC.total_time
+      GC.start
+      GC.total_time.should > time_before
+    end
+  end
+end