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require 'spec_helper'
require 'tmpdir'
class Hiera
describe Filecache do
before do
@cache = Filecache.new
end
def write_file(file, contents)
File.open(file, 'w') do |f|
f.write(contents)
end
end
describe "#read" do
it "reads data from a file" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read(file)).to eq("my data")
end
end
it "rereads data when the file changes" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read(file)).to eq("my data")
write_file(file, "changed data")
expect(@cache.read(file)).to eq("changed data")
end
end
it "uses the provided default when the type does not match the expected type" do
Hiera.expects(:debug).with(regexp_matches(/String.*not.*Hash, setting defaults/))
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
data = @cache.read(file, Hash, { :testing => "hash" }) do |data|
"a string"
end
expect(data).to eq({ :testing => "hash" })
end
end
it "traps any errors from the block and uses the default value" do
Hiera.expects(:debug).with(regexp_matches(/Reading data.*failed:.*testing error/))
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
data = @cache.read(file, Hash, { :testing => "hash" }) do |data|
raise ArgumentError, "testing error"
end
expect(data).to eq({ :testing => "hash" })
end
end
it "raises an error when there is no default given and there is a problem" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect do
@cache.read(file, Hash) do |data|
raise ArgumentError, "testing error"
end
end.to raise_error(ArgumentError, "testing error")
end
end
end
describe "#read_file" do
it "reads data from a file" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read_file(file)).to eq("my data")
end
end
it "sets the encoding to UTF-8 when reading a file" do
begin
original_encoding = Encoding.default_external
Encoding.default_external = Encoding::ISO_8859_1
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read_file(file).encoding).to eq(Encoding::UTF_8)
end
ensure
Encoding.default_external = original_encoding
end
end
it "reads a file with unicode characters" do
begin
original_encoding = Encoding.default_external
Encoding.default_external = Encoding::ISO_8859_1
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "\u2603")
expect(@cache.read_file(file)).to eq("\u2603")
end
ensure
Encoding.default_external = original_encoding
end
end
it "rereads data when the file changes" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read_file(file)).to eq("my data")
write_file(file, "changed data")
expect(@cache.read_file(file)).to eq("changed data")
end
end
it "errors when the type does not match the expected type" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect do
@cache.read_file(file, Hash) do |data|
"a string"
end
end.to raise_error(TypeError)
end
end
it "converts the read data using the block" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect(@cache.read_file(file, Hash) do |data|
{ :data => data }
end).to eq({ :data => "my data" })
end
end
it "errors when the file does not exist" do
expect do
@cache.read_file("/notexist")
end.to raise_error(Errno::ENOENT)
end
it "propogates any errors from the block" do
Dir.mktmpdir do |dir|
file = File.join(dir, "testing")
write_file(file, "my data")
expect do
@cache.read_file(file) do |data|
raise ArgumentError, "testing error"
end
end.to raise_error(ArgumentError, "testing error")
end
end
end
end
end
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