fmt: shared number formatting for HTML and PDF

test/fmt_test.rb

@@ -0,0 +1,22 @@
+require_relative 'test_helper'
+
+class FmtTest < Minitest::Test
+  def test_rate_pads_to_min_dp
+    assert_equal '2.9500', Fmt.rate('2.95')
+    assert_equal '3.0000', Fmt.rate(3)
+  end
+
+  def test_rate_keeps_captured_precision
+    assert_equal '2.95123456', Fmt.rate('2.95123456')
+  end
+
+  def test_rate_groups_thousands
+    assert_equal '1,050.2500', Fmt.rate('1050.25')
+  end
+
+  def test_ltc_trims_trailing_zeros
+    assert_equal '1.25', Fmt.ltc('1.250000')
+    assert_equal '2', Fmt.ltc('2.0')
+    assert_equal '0.00123456', Fmt.ltc('0.00123456')
+  end
+end