   it 'should be false for 5 m  >=5 km', ->
     @aLtB_Quantity_diff.exec(@ctx).should.be.false()
 
-  it 'should be false for 5 Cel >= 4 m', ->
-    should.not.exist(@aGtB_Quantity_incompatible.exec(@ctx))
-
-  it 'should be false for 5 Cel >= 5 m', ->
-    should.not.exist(@aEqB_Quantity_incompatible.exec(@ctx))
-
-  it 'should be false for 5 Cel >= 40 m', ->
-    should.not.exist(@aLtB_Quantity_incompatible.exec(@ctx))
-
-  it 'should be false for 100 [nmi_i] / 2 h > 49 mg/[lb_av]', ->
+  it 'should be null for 5 Cel >= 4 m', ->
+    should.not.exist(@aGtB_Quantity_incompatible.exec(@ctx))
+
+  it 'should be null for 5 Cel >= 5 m', ->
+    should.not.exist(@aEqB_Quantity_incompatible.exec(@ctx))
+
+  it 'should be null for 5 Cel >= 40 m', ->
+    should.not.exist(@aLtB_Quantity_incompatible.exec(@ctx))
+
+  it 'should be null for 100 [nmi_i] / 2 h > 49 mg/[lb_av]', ->
     should.not.exist(@divideUcum_incompatible.exec(@ctx))
 
   it 'should be true for 100 mg / 2 [lb_av]  > 49 mg/[lb_av]', ->

  it 'should be false for 5 m < 5 km', ->
    @aLtB_Quantity_diff.exec(@ctx).should.be.true()

  it 'should be false for 5 Cel < 4 m', ->
    should.not.exist(@aGtB_Quantity_incompatible.exec(@ctx))

  it 'should be false for 5 Cel < 5 m', ->
    should.not.exist(@aEqB_Quantity_incompatible.exec(@ctx))

  it 'should be false for 5 Cel < 40 m', ->
    should.not.exist(@aLtB_Quantity_incompatible.exec(@ctx))

describe 'LessOrEqual', ->

  it 'should be false for 5 m > 5 km', ->
    @aLtB_Quantity_diff.exec(@ctx).should.be.false()

  it 'should be null for 5 Cel > 4 m', ->
    should.not.exist(@aGtB_Quantity_incompatible.exec(@ctx))

  it 'should be null for 5 Cel > 5 m', ->
    should.not.exist(@aEqB_Quantity_incompatible.exec(@ctx))

  it 'should be null for 5 Cel > 40 m', ->
    should.not.exist(@aLtB_Quantity_incompatible.exec(@ctx))


