(#12412) Refactor execution of echo in acceptance tests

Previously, some of the acceptance tests were using `/bin/echo ...` as
the command for an exec resource, which doesn't work on Windows
agents.

This commit refactors the tests to use the `Host#echo` method, which
generates a platform-specific command for executing echo. By default,
the method generates a fully-qualified path for executing echo, but if
you pass false, then it generates an unqualified path (for cases where
the manifest specifies the path to use).

The commit also refactors the tests to use `agents.each do |agent|`
style test, which is necessary to generate platform-specific commands.

acceptance/tests/language/resource_refs_with_nested_arrays.rb

@@ -1,27 +1,27 @@
 test_name "#7681: Allow using array variables in resource references"
 
-test_manifest = <<MANIFEST
+agents.each do |agent|
+  test_manifest = <<MANIFEST
 $exec_names = ["first", "second"]
 exec { "first":
-  command => "echo the first command",
-  path => "/usr/bin:/bin",
+  command => "#{agent.echo('the first command')}",
+  path => "#{agent.path}",
   logoutput => true,
 }
 exec { "second":
-  command => "echo the second command",
-  path => "/usr/bin:/bin",
+  command => "#{agent.echo('the second command')}",
+  path => "#{agent.path}",
   logoutput => true,
 }
 exec { "third":
-  command => "echo the final command",
-  path => "/usr/bin:/bin",
+  command => "#{agent.echo('the final command')}",
+  path => "#{agent.path}",
   logoutput => true,
   require => Exec[$exec_names],
 }
 MANIFEST
 
-results = apply_manifest_on agents, test_manifest
-
-results.each do |result|
-  assert_match(/Exec\[third\].*the final command/, "#{result.stdout}")
+  apply_manifest_on agent, test_manifest do
+    assert_match(/Exec\[third\].*the final command/, "#{stdout}")
+  end
 end

acceptance/tests/stages/ticket_4655_default_stage_for_classes.rb

@@ -1,39 +1,42 @@
 test_name "#4655: Allow setting the default stage for parameterized classes"
 
-temp_file_name = "/tmp/4655-stage-in-parameterized-class.#{$$}"
+agents.each do |agent|
+  temp_file_name = agent.tmpfile('4655-stage-in-parameterized-class')
 test_manifest = <<HERE
 stage { one: before => Stage[two] }
 stage { two: before => Stage[three] }
 stage { three: before => Stage[main] }
 
 class in_one {
-  exec { "echo 'in_one' > #{temp_file_name}":
-    path => '/usr/bin:/bin',
+  exec { "#{agent.echo('in_one', false)} > #{temp_file_name}":
+    path => '#{agent.path}',
   }
 }
 class { in_one: stage => "one" }
 
 class in_two( $stage=two ){
-  exec { "echo 'in_two' >> #{temp_file_name}":
-    path => '/usr/bin:/bin',
+  exec { "#{agent.echo('in_two', false)} >> #{temp_file_name}":
+    path => '#{agent.path}',
   }
 }
 class { in_two: }
 
 class in_three {
-  exec { "echo 'in_three' >> #{temp_file_name}":
-    path => '/usr/bin:/bin',
+  exec { "#{agent.echo('in_three', false)} >> #{temp_file_name}":
+    path => '#{agent.path}',
   }
 }
 class { "in_three": stage => "three" }
 HERE
 
-expected_results = "in_one
+  expected_results = "in_one
 in_two
 in_three
 "
-apply_manifest_on agents, test_manifest
+  apply_manifest_on agent, test_manifest
 
-on(agents, "cat #{temp_file_name}").each do |result|
-    assert_equal(expected_results, "#{result.stdout}", "Unexpected result for host '#{result.host}'")
+  on(agent, "cat #{temp_file_name}") do
+    # echo on windows adds \r\n, so do dotall regexp match
+    assert_match(/in_one\s*in_two\s*\in_three/m, stdout, "Unexpected result for host '#{agent}'")
+  end
 end

acceptance/tests/ticket_4233_resource_with_a_newline.rb

@@ -10,7 +10,8 @@ test_name "#4233: resource with a newline"
 # if we find it.
 
 agents.each do |host|
-  apply_manifest_on(host, 'exec { \'/bin/echo -e "\nHello World\n"\': }') do
+  resource = host.echo('-e "\nHello World\n"')
+  apply_manifest_on(host, "exec { '#{resource}': }") do
     assert_no_match(/err:/, stdout, "error report in output on #{host}")
   end
 end