Initial commit

spec/models/table/column_typecaster_spec.rb

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+require_relative '../../simplecov_helper'
+require_relative '../../rspec_configuration'
+require_relative '../../../app/models/table/column_typecaster'
+
+describe CartoDB::ColumnTypecaster do
+
+  describe '#pg_replace_expression' do
+    before(:all) do
+      @column_typecaster = CartoDB::ColumnTypecaster.new({
+          user_database: nil,
+          schema: nil,
+          table_name: nil,
+          column_name: nil,
+          new_type: nil
+        })
+    end
+
+    it 'takes a column_name and a set of replacements and returns a postgres expression that implements them' do
+      # e.g.: as it if where in spanish locale
+      thousand_separator = '.'
+      decimal_separator = ','
+
+      # order matters, the innermost expression will be applied first
+      replacements = [
+        [thousand_separator, ''],
+        [decimal_separator, '.'],
+        ['$', '']
+      ]
+
+      @column_typecaster.send(:pg_replace_expression, 'my_column', replacements)
+        .should == %Q{replace(replace(replace("my_column", '.', ''), ',', '.'), '$', '')}
+    end
+
+    it 'returns an expression quasi-equivalent to the previous implementation' do
+      # us locale
+      thousand_separator = ','
+      decimal_separator = '.'
+
+      replacements = [
+        [thousand_separator, ''],
+        [decimal_separator, '.']
+      ]
+
+      @column_typecaster.send(:pg_replace_expression, 'my_column', replacements)
+        .should == %Q{replace(replace("my_column", ',', ''), '.', '.')}
+    end
+  end
+end