Let Time internals always be in UTC

spec/std/file_spec.cr

@@ -958,8 +958,8 @@ describe "File" do
       filename = "#{__DIR__}/data/temp_write.txt"
       File.write(filename, "")
 
-      atime = Time.new(2000, 1, 2)
-      mtime = Time.new(2000, 3, 4)
+      atime = Time.utc(2000, 1, 2)
+      mtime = Time.utc(2000, 3, 4)
 
       File.utime(atime, mtime, filename)
 
@@ -971,8 +971,8 @@ describe "File" do
     end
 
     it "raises if file not found" do
-      atime = Time.new(2000, 1, 2)
-      mtime = Time.new(2000, 3, 4)
+      atime = Time.utc(2000, 1, 2)
+      mtime = Time.utc(2000, 3, 4)
 
       expect_raises Errno, "Error setting time to file" do
         File.utime(atime, mtime, "#{__DIR__}/nonexistent_file")
@@ -994,7 +994,7 @@ describe "File" do
 
     it "sets file times to given time" do
       filename = "#{__DIR__}/data/temp_touch.txt"
-      time = Time.new(2000, 3, 4)
+      time = Time.utc(2000, 3, 4)
       begin
         File.touch(filename, time)
 

spec/std/time/location_spec.cr

@@ -1,22 +1,5 @@
 require "spec"
-
-private def with_env(name, value)
-  previous = ENV[name]?
-  begin
-    ENV[name] = value
-    yield
-  ensure
-    ENV[name] = previous
-  end
-end
-
-private ZONEINFO_ZIP = File.join(__DIR__, "..", "data", "zoneinfo.zip")
-
-private def with_zoneinfo(path = ZONEINFO_ZIP)
-  with_env("ZONEINFO", path) do
-    yield
-  end
-end
+require "./spec_helper"
 
 class Time::Location
   def __cached_range

spec/std/time/spec_helper.cr

@@ -0,0 +1,17 @@
+def with_env(name, value)
+  previous = ENV[name]?
+  begin
+    ENV[name] = value
+    yield
+  ensure
+    ENV[name] = previous
+  end
+end
+
+ZONEINFO_ZIP = File.join(__DIR__, "..", "data", "zoneinfo.zip")
+
+def with_zoneinfo(path = ZONEINFO_ZIP)
+  with_env("ZONEINFO", path) do
+    yield
+  end
+end