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count_test.go
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package aggregation
import (
"testing"
"github.com/src-d/go-mysql-server/sql"
"github.com/src-d/go-mysql-server/sql/expression"
"github.com/stretchr/testify/require"
)
func TestCountEval1(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCount(expression.NewLiteral(1, sql.Int32))
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, nil))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b, sql.NewRow(1)))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.NoError(c.Update(ctx, b, sql.NewRow(1, 2, 3)))
require.Equal(int64(5), eval(t, c, b))
b2 := c.NewBuffer()
require.NoError(c.Update(ctx, b2, nil))
require.NoError(c.Update(ctx, b2, sql.NewRow("foo")))
require.NoError(c.Merge(ctx, b, b2))
require.Equal(int64(7), eval(t, c, b))
}
func TestCountEvalStar(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCount(expression.NewStar())
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, nil))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b, sql.NewRow(1)))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.NoError(c.Update(ctx, b, sql.NewRow(1, 2, 3)))
require.Equal(int64(5), eval(t, c, b))
b2 := c.NewBuffer()
require.NoError(c.Update(ctx, b2, sql.NewRow()))
require.NoError(c.Update(ctx, b2, sql.NewRow("foo")))
require.NoError(c.Merge(ctx, b, b2))
require.Equal(int64(7), eval(t, c, b))
}
func TestCountEvalString(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCount(expression.NewGetField(0, sql.Text, "", true))
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.Equal(int64(1), eval(t, c, b))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.Equal(int64(1), eval(t, c, b))
}
func TestCountDistinctEval1(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCountDistinct(expression.NewLiteral(1, sql.Int32))
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, nil))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b, sql.NewRow(1)))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.NoError(c.Update(ctx, b, sql.NewRow(1, 2, 3)))
require.Equal(int64(1), eval(t, c, b))
}
func TestCountDistinctEvalStar(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCountDistinct(expression.NewStar())
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, nil))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b, sql.NewRow(1)))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.NoError(c.Update(ctx, b, sql.NewRow(1, 2, 3)))
require.Equal(int64(5), eval(t, c, b))
b2 := c.NewBuffer()
require.NoError(c.Update(ctx, b2, sql.NewRow(1)))
require.NoError(c.Update(ctx, b2, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b2, sql.NewRow(5)))
require.NoError(c.Merge(ctx, b, b2))
require.Equal(int64(6), eval(t, c, b))
}
func TestCountDistinctEvalString(t *testing.T) {
require := require.New(t)
ctx := sql.NewEmptyContext()
c := NewCountDistinct(expression.NewGetField(0, sql.Text, "", true))
b := c.NewBuffer()
require.Equal(int64(0), eval(t, c, b))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.Equal(int64(1), eval(t, c, b))
require.NoError(c.Update(ctx, b, sql.NewRow(nil)))
require.NoError(c.Update(ctx, b, sql.NewRow("foo")))
require.NoError(c.Update(ctx, b, sql.NewRow("bar")))
require.Equal(int64(2), eval(t, c, b))
}