unit testing, more samples

lib/squib/args/unit_conversion.rb

@@ -4,7 +4,7 @@ require_relative '../constants'
 module Squib
   module Args
     module UnitConversion
-      module_function def parse(arg, dpi=300, cell_px=75)
+      module_function def parse(arg, dpi=300, cell_px=37.5)
         case arg.to_s.rstrip
         when /in$/ # ends with "in"
           arg.rstrip[0..-2].to_f * dpi

samples/units/_cells.rb

@@ -6,7 +6,7 @@ Squib::Deck.new(width: '1.5in', height: '1.5in') do
   background color: :white
 
   # Squib has a custom unit, called "cell"
-  # A "cell" unit defaults to 75px, which at 300dpi is 1/8in or 3.175mm
+  # A "cell" unit defaults to 37.5px, which at 300dpi is 1/8in or 3.175mm
   # This is a very common multiple for layouts.
   # This helps us lay things out in grids without doing much math in our heads
   # Here's an example... with grid!

spec/args/box_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 require 'squib/args/box'
 
 describe Squib::Args::Box do
-  let(:deck) { OpenStruct.new(width: 123, height: 456, size: 1, dpi: 300.0) }
+  let(:deck) { OpenStruct.new(width: 123, height: 456, size: 1, dpi: 300.0, cell_px: 37.5) }
   let(:expected_defaults) { { x: [0], y: [0], width: [123], height: [456] } }
 
   it 'intitially has no params set' do
@@ -113,6 +113,17 @@ describe Squib::Args::Box do
       )
     end
 
+    it 'handles cells' do
+      args = {x: '1c', y: '1c', width: '1c', height: '1c'}
+      box = Squib::Args.extract_box args, deck
+      expect(box).to have_attributes(
+        x: [37.5],
+        width: [37.5],
+        y: [37.5],
+        height: [37.5],
+      )
+    end
+
   end
 
   context 'validation' do
@@ -154,5 +165,24 @@ describe Squib::Args::Box do
 
   end
 
+  context 'xywh shorthands' do
+
+    it 'handles shorthands' do
+      args = {
+        x: 'middle + 1c',
+        y: 'middle',
+        width: 'width - 2c',
+        height: 'height / 3'
+      }
+      box = Squib::Args.extract_box args, deck
+      expect(box).to have_attributes(
+        x: [99.0],
+        y: [228.0],
+        width: [48.0],
+        height: [152.0]
+      )
+    end
+
+  end
 
 end

spec/args/unit_conversion_spec.rb

@@ -34,5 +34,25 @@ describe Squib::Args::UnitConversion do
     expect(subject.parse('30deg')).to be_within(0.0001).of(0.523599)
   end
 
+  it 'does cells' do
+    expect(subject.parse('1c')).to eq(37.5)
+    expect(subject.parse('1cell')).to eq(37.5)
+    expect(subject.parse('1cells')).to eq(37.5)
+    expect(subject.parse('1 cells')).to eq(37.5)
+    expect(subject.parse('1 cells ')).to eq(37.5)
+    expect(subject.parse('2c')).to eq(75)
+    expect(subject.parse('  0.5c')).to eq(18.75)
+    expect(subject.parse(' -0.5 c  ')).to eq(-18.75)
+  end
+
+  context 'when configured' do
+    it 'does mm @ dpi=100' do
+      expect(subject.parse('3.175mm', 100)).to be_within(0.001).of(12.5)
+    end
+
+    it 'does cell @ cell_px=75' do
+      expect(subject.parse('1c', 100, 75)).to be_within(0.001).of(75)
+    end
+  end
 
 end

spec/args/xywh_shorthands_spec.rb

@@ -0,0 +1,26 @@
+require 'spec_helper'
+require 'squib/args/xywh_shorthands'
+
+describe Squib::Args::XYWHShorthands do
+
+  let(:deck) { OpenStruct.new(width: 100, height: 200, size: 1, dpi: 300.0) }
+
+  it 'handles middle' do
+    args = {
+      x: 'middle',
+      y: 'middle + 1in',
+      width: 'width / 2',
+      height: 'height - 1in',
+    }
+    box = Squib::Args.extract_box args, deck
+    expect(box).to have_attributes({
+      x: [50.0],
+      y: [400.0],
+      width: [50.0],
+      height: [-100.0]
+    })
+  end
+
+
+end
+