basic if statement tests

test/compiler/statements/helper.rb

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+require_relative '../../helper'
+
+
+module Statements
+
+  def check
+    machine = Virtual.machine.boot
+    machine.parse_and_compile @string_input
+    produced = Virtual.machine.space.get_main.source
+    assert @expect , "No output given"
+    assert_equal @expect.length ,  produced.blocks.length , "Block length"
+    produced.blocks.each_with_index do |b,i|
+      codes = @expect[i]
+      assert codes , "No codes for block #{i}"
+      assert_equal b.codes.length , codes.length , "Code length for block #{i+1}"
+      b.codes.each_with_index do |c , ii |
+        assert_equal codes[ii] ,  c.class ,  "Block #{i+1} , code #{ii+1}"
+      end
+    end
+  end
+
+
+end

test/compiler/statements/test_all.rb

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+require_relative "test_if"

test/compiler/statements/test_if.rb

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+require_relative 'helper'
+
+class TestIfStatement < MiniTest::Test
+  include Statements
+
+  def test_if_basic
+    @string_input = <<HERE
+class Object
+  int main()
+    if( 10 < 12)
+      return 3
+    else
+      return 4
+    end
+  end
+end
+HERE
+  @expect =  [[Virtual::MethodEnter,Register::LoadConstant,Register::LoadConstant,
+                Register::OperatorInstruction,Register::IsZeroBranch] ,
+                [Register::LoadConstant,Register::AlwaysBranch] ,[Register::LoadConstant]  ,[] ,
+                [Virtual::MethodReturn]]
+  check
+  end
+
+
+  def test_if_small
+    @string_input = <<HERE
+class Object
+  int main()
+    if( 10 < 12)
+      return 3
+    end
+  end
+end
+HERE
+  @expect =  [[Virtual::MethodEnter,Register::LoadConstant,Register::LoadConstant,
+                Register::OperatorInstruction,Register::IsZeroBranch] ,
+                [Register::AlwaysBranch] ,[Register::LoadConstant]  ,[] ,
+                [Virtual::MethodReturn]]
+  check
+  end
+
+
+  def ttest_return
+    @string_input = <<HERE
+class Object
+  int main()
+    return 5
+  end
+end
+HERE
+  @expect =  [[Virtual::MethodEnter,Register::LoadConstant] , [Virtual::MethodReturn]]
+  check
+  end
+
+
+  def ttest_call_function
+    @string_input = <<HERE
+class Object
+  int itest(int n)
+    return 4
+  end
+
+  int main()
+    itest(20)
+  end
+end
+HERE
+    @expect =  [ [Virtual::MethodEnter,Register::GetSlot,Register::SetSlot,Register::LoadConstant,
+                  Register::SetSlot,Register::LoadConstant,Register::SetSlot,Virtual::MethodCall,
+                  Register::GetSlot] ,[Virtual::MethodReturn] ]
+  check
+  end
+end