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|
# frozen_string_literal: true
RSpec.describe Unparser::Diff do
let(:object) { described_class }
describe '.build' do
subject { object.build(old_string, new_string) }
let(:old_string) { "foo\nbar" }
let(:new_string) { "bar\nbaz" }
it { should eql(described_class.new(%w[foo bar], %w[bar baz])) }
end
describe '#colorized_diff' do
let(:object) { described_class.new(old, new) }
subject { object.colorized_diff }
context 'when there is a diff at begin of hunk' do
let(:old) { %w[foo bar] }
let(:new) { %w[baz bar] }
let(:expectation) do
[
"@@ -1 +1 @@\n",
Unparser::Color::RED.format("-foo\n"),
Unparser::Color::GREEN.format("+baz\n"),
].join
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when there is no diff' do
let(:old) { '' }
let(:new) { '' }
it { should be(nil) }
it_should_behave_like 'an idempotent method'
end
end
describe '#diff' do
let(:object) { described_class.new(old, new) }
subject { object.diff }
context 'when there is a diff at begin and end' do
let(:old) { %w[foo bar foo] }
let(:new) { %w[baz bar baz] }
let(:expectation) do
<<~STR
@@ -1,4 +1,4 @@
-foo
+baz
bar
-foo
+baz
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when there is a diff at begin of hunk' do
let(:old) { %w[foo bar] }
let(:new) { %w[baz bar] }
let(:expectation) do
<<~STR
@@ -1 +1 @@
-foo
+baz
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when there is a diff NOT at begin of hunk' do
let(:old) { %w[foo bar] }
let(:new) { %w[foo baz bar] }
let(:expectation) do
<<~STR
@@ -1,2 +1,3 @@
foo
+baz
bar
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when the diff has a long context at begin' do
let(:old) { %w[foo bar baz boz a b c] }
let(:new) { %w[foo bar baz boz a b c other] }
let(:expectation) do
<<~STR
@@ -1,8 +1,9 @@
foo
bar
baz
boz
a
b
c
+other
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when the diff has a long context at end, deleting' do
let(:old) { %w[other foo bar baz boz a b c] }
let(:new) { %w[foo bar baz boz a b c] }
let(:expectation) do
<<~STR
@@ -1,2 +1 @@
-other
foo
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when the diff has a long context at end, inserting' do
let(:old) { %w[foo bar baz boz a b c] }
let(:new) { %w[other foo bar baz boz a b c] }
let(:expectation) do
<<~STR
@@ -1 +1,2 @@
+other
foo
STR
end
it { should eql(expectation) }
it_should_behave_like 'an idempotent method'
end
context 'when there is no diff' do
let(:old) { '' }
let(:new) { '' }
it { should be(nil) }
it_should_behave_like 'an idempotent method'
end
end
end
|
