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predicate_test.go
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predicate_test.go
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package reads_test
import (
"testing"
"github.com/influxdata/influxdb/storage/reads"
"github.com/influxdata/influxdb/storage/reads/datatypes"
)
func TestPredicateToExprString(t *testing.T) {
cases := []struct {
n string
r *datatypes.Predicate
e string
}{
{
n: "returns [none] for nil",
r: nil,
e: "[none]",
},
{
n: "logical AND",
r: &datatypes.Predicate{
Root: &datatypes.Node{
NodeType: datatypes.NodeTypeLogicalExpression,
Value: &datatypes.Node_Logical_{Logical: datatypes.LogicalAnd},
Children: []*datatypes.Node{
{
NodeType: datatypes.NodeTypeComparisonExpression,
Value: &datatypes.Node_Comparison_{Comparison: datatypes.ComparisonEqual},
Children: []*datatypes.Node{
{NodeType: datatypes.NodeTypeTagRef, Value: &datatypes.Node_TagRefValue{TagRefValue: "host"}},
{NodeType: datatypes.NodeTypeLiteral, Value: &datatypes.Node_StringValue{StringValue: "host1"}},
},
},
{
NodeType: datatypes.NodeTypeComparisonExpression,
Value: &datatypes.Node_Comparison_{Comparison: datatypes.ComparisonRegex},
Children: []*datatypes.Node{
{NodeType: datatypes.NodeTypeTagRef, Value: &datatypes.Node_TagRefValue{TagRefValue: "region"}},
{NodeType: datatypes.NodeTypeLiteral, Value: &datatypes.Node_RegexValue{RegexValue: "^us-west"}},
},
},
},
},
},
e: `'host' = "host1" AND 'region' =~ /^us-west/`,
},
}
for _, tc := range cases {
t.Run(tc.n, func(t *testing.T) {
if got, wanted := reads.PredicateToExprString(tc.r), tc.e; got != wanted {
t.Fatal("got:", got, "wanted:", wanted)
}
})
}
}