allow for multiple items with the same starting letter on meta

lib/changelogerator.rb

@@ -1,5 +1,49 @@
 # frozen_string_literal: true
 
+# Return the label code for a change
+# if the label name matches the expected pattern.
+# nil otherwise.
+def parse_change_label(name)
+  m = match = name.match(/^([a-z])(\d+)-(.*)$/i)
+  return nil unless m
+
+  letter, digits, text = match.captures
+  number = digits.to_i
+  [letter, number, text]
+end
+
+def compute_change_meta(change)
+  meta = {}
+
+  change.labels.each do |label|
+    letter, number, text = parse_change_label(label.name)
+
+    next unless letter && number
+
+    if meta.key?(letter)
+      aggregate = meta[letter]['agg']
+      aggregate['max'] = number if number > aggregate['max']
+      aggregate['min'] = number if number < aggregate['min']
+      aggregate['count'] += 1
+    else
+      meta[letter] = {
+        'agg' => {
+          'count' => 1,
+          'max' => number,
+          'min' => number
+        }
+      }
+    end
+
+    meta[letter]["#{letter}#{number}"] = {
+      'value' => number,
+      'text' => text
+    }
+  end
+
+  change['meta'] = meta
+end
+
 # A small wrapper class for more easily generating and manipulating Github/Git
 # changelogs. Given two different git objects (sha, tag, whatever), it will
 # find all PRs that made up that diff and store them as a list. Also allows
@@ -54,18 +98,6 @@ def self.changes_files_in_paths?(change, paths)
     nil
   end
 
-  # Return the label code for a change
-  # if the label name matches the expected pattern.
-  # nil otherwise.
-  def self.get_label_code(name)
-    m = match = name.match(/^([a-z])(\d+)-(.*)$/i)
-    if m
-      letter, number, text = match.captures
-      return [letter, number, text]
-    end
-    nil
-  end
-
   ## End of class methods
 
   # github_repo: 'paritytech/polkadot'
@@ -125,23 +157,6 @@ def to_json(*_args)
 
   private
 
-  # Compute and attach metadata about one change
-  def compute_change_meta(change)
-    meta = {}
-
-    change.labels.each do |label|
-      letter, number, text = self.class.get_label_code(label.name)
-      next unless letter && number
-
-      meta[letter] = {
-        value: number.to_i,
-        text: text
-      }
-    end
-
-    change['meta'] = meta
-  end
-
   # Prepend the repo if @prefix is true
   def prettify_title(pull)
     pull[:pretty_title] = if @prefix

test/test_basic.rb

@@ -6,6 +6,8 @@
 
 class TestChangelogerator < Test::Unit::TestCase
   def test_polkadot_1_commit
+    return unless ENV['GITHUB_TOKEN']
+
     ref1 = '2ebabcec7fcbb3d13a965a852df0559a4aa12a5e'
     ref2 = '9c05f9753b2f939ccf5ba18c08dd4c83c3ab9e0b'
     cl = Changelog.new(
@@ -22,6 +24,8 @@ def test_polkadot_1_commit
   end
 
   def test_polkadot_many_commits
+    return unless ENV['GITHUB_TOKEN']
+
     ref1 = 'v0.9.8'
     ref2 = 'v0.9.11'
     cl = Changelog.new(
@@ -39,6 +43,8 @@ def test_polkadot_many_commits
   end
 
   def test_cumulus_many_commits
+    return unless ENV['GITHUB_TOKEN']
+
     ref1 = 'statemine-v1.0.0'
     ref2 = 'statemine_v4'
     cl = Changelog.new(

test/test_helpers.rb

@@ -6,17 +6,17 @@
 
 class TestChangelogerator < Test::Unit::TestCase
   def test_helpers
-    letter, number, text = Changelog.get_label_code('B2-test')
+    letter, number, text = parse_change_label('B2-test')
     assert_equal('B', letter)
-    assert_equal('2', number)
+    assert_equal(2, number)
     assert_equal('test', text)
 
-    letter, number, text = Changelog.get_label_code('Z44-test 😁')
+    letter, number, text = parse_change_label('Z44-test 😁')
     assert_equal('Z', letter)
-    assert_equal('44', number)
+    assert_equal(44, number)
     assert_equal('test 😁', text)
 
-    letter, number, text = Changelog.get_label_code('123-foo')
+    letter, number, text = parse_change_label('123-foo')
     assert_equal(nil, letter)
     assert_equal(nil, number)
     assert_equal(nil, text)

test/test_meta.rb

@@ -2,27 +2,61 @@
 
 require 'json'
 require_relative '../lib/changelogerator'
+require_relative './utils'
 require 'test/unit'
 
 class TestChangelogerator < Test::Unit::TestCase
   def test_meta_1_commit
-    ref1 = '2ebabcec7fcbb3d13a965a852df0559a4aa12a5e'
-    ref2 = '9c05f9753b2f939ccf5ba18c08dd4c83c3ab9e0b'
+    change = Change.new(%w[A1-foo A2-foo B0-foo B1-foo B2-foo])
+    compute_change_meta(change)
 
-    cl = Changelog.new(
-      'paritytech/polkadot', ref1, ref2,
-      token: ENV['GITHUB_TOKEN'],
-      prefix: true
-    )
+    p change.meta.to_json
 
-    j = cl.to_json
-    assert_equal(1, cl.changes.length)
-    assert_equal(%w[A B C], cl.changes[0].meta.keys) # A2 + B0 + C1
+    assert_equal(%w[A B], change.meta.keys)
 
-    p cl.meta
+    assert_equal(change.meta['A']['agg']['min'], 1) # A(1)
+    assert_equal(change.meta['A']['agg']['max'], 2) # A(2)
+    assert_equal(change.meta['A']['agg']['count'], 2) # A1 + A2
 
-    puts format('JSON Length: %d', j.length)
-    assert(j.length > 11_000)
-    assert(j.length < 13_000)
+    assert_equal(change.meta['B']['agg']['min'], 0) # B(0)
+    assert_equal(change.meta['B']['agg']['max'], 2) # B(2)
+    assert_equal(change.meta['B']['agg']['count'], 3) # B0 + B1 + B2
+
+    assert_equal(JSON.pretty_generate(change.meta), '{
+  "A": {
+    "agg": {
+      "count": 2,
+      "max": 2,
+      "min": 1
+    },
+    "A1": {
+      "value": 1,
+      "text": "foo"
+    },
+    "A2": {
+      "value": 2,
+      "text": "foo"
+    }
+  },
+  "B": {
+    "agg": {
+      "count": 3,
+      "max": 2,
+      "min": 0
+    },
+    "B0": {
+      "value": 0,
+      "text": "foo"
+    },
+    "B1": {
+      "value": 1,
+      "text": "foo"
+    },
+    "B2": {
+      "value": 2,
+      "text": "foo"
+    }
+  }
+}')
   end
 end

test/utils.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class Change
+  attr_reader :labels
+
+  class Label
+    attr_reader :name
+
+    def initialize(name)
+      @name = name
+    end
+  end
+
+  def initialize(labels)
+    @labels = labels.map do |label|
+      Label.new(label)
+    end
+    @extra = {}
+  end
+
+  def []=(key, value)
+    @extra[key] = value
+  end
+
+  def meta
+    @extra['meta']
+  end
+end