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bin/gems/liquid-4.0.4/test/unit/condition_unit_test.rb

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+require 'test_helper'
+
+class ConditionUnitTest < Minitest::Test
+  include Liquid
+
+  def setup
+    @context = Liquid::Context.new
+  end
+
+  def test_basic_condition
+    assert_equal false, Condition.new(1, '==', 2).evaluate
+    assert_equal true,  Condition.new(1, '==', 1).evaluate
+  end
+
+  def test_default_operators_evalute_true
+    assert_evaluates_true 1, '==', 1
+    assert_evaluates_true 1, '!=', 2
+    assert_evaluates_true 1, '<>', 2
+    assert_evaluates_true 1, '<', 2
+    assert_evaluates_true 2, '>', 1
+    assert_evaluates_true 1, '>=', 1
+    assert_evaluates_true 2, '>=', 1
+    assert_evaluates_true 1, '<=', 2
+    assert_evaluates_true 1, '<=', 1
+    # negative numbers
+    assert_evaluates_true 1, '>', -1
+    assert_evaluates_true -1, '<', 1
+    assert_evaluates_true 1.0, '>', -1.0
+    assert_evaluates_true -1.0, '<', 1.0
+  end
+
+  def test_default_operators_evalute_false
+    assert_evaluates_false 1, '==', 2
+    assert_evaluates_false 1, '!=', 1
+    assert_evaluates_false 1, '<>', 1
+    assert_evaluates_false 1, '<', 0
+    assert_evaluates_false 2, '>', 4
+    assert_evaluates_false 1, '>=', 3
+    assert_evaluates_false 2, '>=', 4
+    assert_evaluates_false 1, '<=', 0
+    assert_evaluates_false 1, '<=', 0
+  end
+
+  def test_contains_works_on_strings
+    assert_evaluates_true 'bob', 'contains', 'o'
+    assert_evaluates_true 'bob', 'contains', 'b'
+    assert_evaluates_true 'bob', 'contains', 'bo'
+    assert_evaluates_true 'bob', 'contains', 'ob'
+    assert_evaluates_true 'bob', 'contains', 'bob'
+
+    assert_evaluates_false 'bob', 'contains', 'bob2'
+    assert_evaluates_false 'bob', 'contains', 'a'
+    assert_evaluates_false 'bob', 'contains', '---'
+  end
+
+  def test_invalid_comparation_operator
+    assert_evaluates_argument_error 1, '~~', 0
+  end
+
+  def test_comparation_of_int_and_str
+    assert_evaluates_argument_error '1', '>', 0
+    assert_evaluates_argument_error '1', '<', 0
+    assert_evaluates_argument_error '1', '>=', 0
+    assert_evaluates_argument_error '1', '<=', 0
+  end
+
+  def test_hash_compare_backwards_compatibility
+    assert_nil Condition.new({}, '>', 2).evaluate
+    assert_nil Condition.new(2, '>', {}).evaluate
+    assert_equal false, Condition.new({}, '==', 2).evaluate
+    assert_equal true, Condition.new({ 'a' => 1 }, '==', { 'a' => 1 }).evaluate
+    assert_equal true, Condition.new({ 'a' => 2 }, 'contains', 'a').evaluate
+  end
+
+  def test_contains_works_on_arrays
+    @context = Liquid::Context.new
+    @context['array'] = [1, 2, 3, 4, 5]
+    array_expr = VariableLookup.new("array")
+
+    assert_evaluates_false array_expr, 'contains', 0
+    assert_evaluates_true array_expr, 'contains', 1
+    assert_evaluates_true array_expr, 'contains', 2
+    assert_evaluates_true array_expr, 'contains', 3
+    assert_evaluates_true array_expr, 'contains', 4
+    assert_evaluates_true array_expr, 'contains', 5
+    assert_evaluates_false array_expr, 'contains', 6
+    assert_evaluates_false array_expr, 'contains', "1"
+  end
+
+  def test_contains_returns_false_for_nil_operands
+    @context = Liquid::Context.new
+    assert_evaluates_false VariableLookup.new('not_assigned'), 'contains', '0'
+    assert_evaluates_false 0, 'contains', VariableLookup.new('not_assigned')
+  end
+
+  def test_contains_return_false_on_wrong_data_type
+    assert_evaluates_false 1, 'contains', 0
+  end
+
+  def test_contains_with_string_left_operand_coerces_right_operand_to_string
+    assert_evaluates_true ' 1 ', 'contains', 1
+    assert_evaluates_false ' 1 ', 'contains', 2
+  end
+
+  def test_or_condition
+    condition = Condition.new(1, '==', 2)
+
+    assert_equal false, condition.evaluate
+
+    condition.or Condition.new(2, '==', 1)
+
+    assert_equal false, condition.evaluate
+
+    condition.or Condition.new(1, '==', 1)
+
+    assert_equal true, condition.evaluate
+  end
+
+  def test_and_condition
+    condition = Condition.new(1, '==', 1)
+
+    assert_equal true, condition.evaluate
+
+    condition.and Condition.new(2, '==', 2)
+
+    assert_equal true, condition.evaluate
+
+    condition.and Condition.new(2, '==', 1)
+
+    assert_equal false, condition.evaluate
+  end
+
+  def test_should_allow_custom_proc_operator
+    Condition.operators['starts_with'] = proc { |cond, left, right| left =~ %r{^#{right}} }
+
+    assert_evaluates_true 'bob', 'starts_with', 'b'
+    assert_evaluates_false 'bob', 'starts_with', 'o'
+  ensure
+    Condition.operators.delete 'starts_with'
+  end
+
+  def test_left_or_right_may_contain_operators
+    @context = Liquid::Context.new
+    @context['one'] = @context['another'] = "gnomeslab-and-or-liquid"
+
+    assert_evaluates_true VariableLookup.new("one"), '==', VariableLookup.new("another")
+  end
+
+  private
+
+  def assert_evaluates_true(left, op, right)
+    assert Condition.new(left, op, right).evaluate(@context),
+      "Evaluated false: #{left} #{op} #{right}"
+  end
+
+  def assert_evaluates_false(left, op, right)
+    assert !Condition.new(left, op, right).evaluate(@context),
+      "Evaluated true: #{left} #{op} #{right}"
+  end
+
+  def assert_evaluates_argument_error(left, op, right)
+    assert_raises(Liquid::ArgumentError) do
+      Condition.new(left, op, right).evaluate(@context)
+    end
+  end
+end # ConditionTest