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|
package expression
import (
"reflect"
"strings"
"testing"
)
// projErrorMode will help with error cases and checking error types
type projErrorMode string
const (
noProjError projErrorMode = ""
// invalidProjectionOperand error will occur when an invalid OperandBuilder is
// used as an argument
invalidProjectionOperand = "BuildOperand error"
// unsetProjection error will occur if the argument ProjectionBuilder is unset
unsetProjection = "unset parameter: ProjectionBuilder"
)
func TestProjectionBuilder(t *testing.T) {
cases := []struct {
name string
input ProjectionBuilder
expectedNode exprNode
err projErrorMode
}{
{
name: "names list function call",
input: NamesList(Name("foo"), Name("bar")),
expectedNode: exprNode{
children: []exprNode{
{
names: []string{"foo"},
fmtExpr: "$n",
},
{
names: []string{"bar"},
fmtExpr: "$n",
},
},
fmtExpr: "$c, $c",
},
},
{
name: "names list method call",
input: Name("foo").NamesList(Name("bar")),
expectedNode: exprNode{
children: []exprNode{
{
names: []string{"foo"},
fmtExpr: "$n",
},
{
names: []string{"bar"},
fmtExpr: "$n",
},
},
fmtExpr: "$c, $c",
},
},
{
name: "add name",
input: Name("foo").NamesList(Name("bar")).AddNames(Name("baz"), Name("qux")),
expectedNode: exprNode{
children: []exprNode{
{
names: []string{"foo"},
fmtExpr: "$n",
},
{
names: []string{"bar"},
fmtExpr: "$n",
},
{
names: []string{"baz"},
fmtExpr: "$n",
}, {
names: []string{"qux"},
fmtExpr: "$n",
},
},
fmtExpr: "$c, $c, $c, $c",
},
},
{
name: "invalid operand",
input: NamesList(Name("")),
err: invalidProjectionOperand,
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
actual, err := c.input.buildTree()
if c.err != noProjError {
if err == nil {
t.Errorf("expect error %q, got no error", c.err)
} else {
if e, a := string(c.err), err.Error(); !strings.Contains(a, e) {
t.Errorf("expect %q error message to be in %q", e, a)
}
}
} else {
if err != nil {
t.Errorf("expect no error, got unexpected Error %q", err)
}
if e, a := c.expectedNode, actual; !reflect.DeepEqual(a, e) {
t.Errorf("expect %v, got %v", e, a)
}
}
})
}
}
func TestBuildProjection(t *testing.T) {
cases := []struct {
name string
input ProjectionBuilder
expected string
err projErrorMode
}{
{
name: "build projection 3",
input: NamesList(Name("foo"), Name("bar"), Name("baz")),
expected: "$c, $c, $c",
},
{
name: "build projection 5",
input: NamesList(Name("foo"), Name("bar"), Name("baz")).AddNames(Name("qux"), Name("quux")),
expected: "$c, $c, $c, $c, $c",
},
{
name: "empty ProjectionBuilder",
input: ProjectionBuilder{},
err: unsetProjection,
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
actual, err := c.input.buildTree()
if c.err != noProjError {
if err == nil {
t.Errorf("expect error %q, got no error", c.err)
} else {
if e, a := string(c.err), err.Error(); !strings.Contains(a, e) {
t.Errorf("expect %q error message to be in %q", e, a)
}
}
} else {
if err != nil {
t.Errorf("expect no error, got unexpected Error %q", err)
}
if e, a := c.expected, actual.fmtExpr; !reflect.DeepEqual(a, e) {
t.Errorf("expect %v, got %v", e, a)
}
}
})
}
}
func TestBuildProjectionChildNodes(t *testing.T) {
cases := []struct {
name string
input ProjectionBuilder
expected []exprNode
err projErrorMode
}{
{
name: "build child nodes",
input: NamesList(Name("foo"), Name("bar"), Name("baz")),
expected: []exprNode{
{
names: []string{"foo"},
fmtExpr: "$n",
},
{
names: []string{"bar"},
fmtExpr: "$n",
},
{
names: []string{"baz"},
fmtExpr: "$n",
},
},
},
{
name: "operand error",
input: NamesList(Name("")),
err: invalidProjectionOperand,
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
actual, err := c.input.buildTree()
if c.err != noProjError {
if err == nil {
t.Errorf("expect error %q, got no error", c.err)
} else {
if e, a := string(c.err), err.Error(); !strings.Contains(a, e) {
t.Errorf("expect %q error message to be in %q", e, a)
}
}
} else {
if err != nil {
t.Errorf("expect no error, got unexpected Error %q", err)
}
if e, a := c.expected, actual.children; !reflect.DeepEqual(a, e) {
t.Errorf("expect %v, got %v", e, a)
}
}
})
}
}
|
