Minor refactor & improved test coverage

t/spreadsheet.vim

@@ -25,6 +25,27 @@ describe 'spreadsheet'
       Expect tablemode#spreadsheet#ColumnCount(3) == 2
     end
 
+    it 'should return the column number'
+      call cursor(2,3)
+      Expect tablemode#spreadsheet#ColumnNr('.') == 1
+      call cursor(2,12)
+      Expect tablemode#spreadsheet#ColumnNr('.') == 2
+    end
+
+    it 'should return true when in the first cell'
+      call cursor(2,3)
+      Expect tablemode#spreadsheet#IsFirstCell() to_be_true
+      call cursor(2,12)
+      Expect tablemode#spreadsheet#IsFirstCell() to_be_false
+    end
+
+    it 'should return true when in the last cell'
+      call cursor(2,3)
+      Expect tablemode#spreadsheet#IsLastCell() to_be_false
+      call cursor(2,12)
+      Expect tablemode#spreadsheet#IsLastCell() to_be_true
+    end
+
     it 'should return the line number of the first row'
       Expect tablemode#spreadsheet#GetFirstRow(2) == 2
       Expect tablemode#spreadsheet#GetFirstRow(3) == 2
@@ -34,6 +55,33 @@ describe 'spreadsheet'
       Expect tablemode#spreadsheet#GetLastRow(2) == 3
       Expect tablemode#spreadsheet#GetLastRow(3) == 3
     end
+
+    describe 'Math'
+      before
+        new
+        read t/fixtures/cell/sample.txt
+      end
+
+      it 'should return the sum of cell range'
+        call cursor(1,3)
+        Expect tablemode#spreadsheet#Sum('1:2') == 4.0
+        Expect tablemode#spreadsheet#Sum('1,1:1,2') == 3.0
+        Expect tablemode#spreadsheet#Sum('1,1:2,2') == 10.0
+        call cursor(2,7)
+        Expect tablemode#spreadsheet#Sum('1:2') == 6.0
+        Expect tablemode#spreadsheet#Sum('2,1:2,2') == 7.0
+      end
+
+      it 'should return the average of cell range'
+        call cursor(1,3)
+        Expect tablemode#spreadsheet#Average('1:2') == 2.0
+        Expect tablemode#spreadsheet#Average('1,1:1,2') == 1.5
+        Expect tablemode#spreadsheet#Average('1,1:2,2') == 5.0
+        call cursor(2,7)
+        Expect tablemode#spreadsheet#Average('1:2') == 3.0
+        Expect tablemode#spreadsheet#Average('2,1:2,2') == 3.5
+      end
+    end
   end
 
   describe 'Manipulations'