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48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
package ast
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import (
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/neilotoole/lg/testlg"
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)
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func TestInspector_findSelectableSegments(t *testing.T) {
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log := testlg.New(t).Strict(true)
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// `@mydb1 | .user | .uid, .username`
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ast, err := buildInitialAST(t, fixtSelect1)
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require.Nil(t, err)
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err = NewWalker(log, ast).AddVisitor(typeSelectorNode, narrowTblSel).Walk()
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require.Nil(t, err)
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insp := NewInspector(log, ast)
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segs := ast.Segments()
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require.Equal(t, 3, len(segs))
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selSegs := insp.FindTablerSegments()
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require.Equal(t, 1, len(selSegs), "should be 1 selectable segment: the tbl sel segment")
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finalSelSeg, err := insp.FindFinalTablerSegment()
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require.Nil(t, err)
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require.Equal(t, selSegs[0], finalSelSeg)
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// `@mydb1 | .user, .address | join(.user.uid == .address.uid) | .uid, .username, .country`
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ast, err = buildInitialAST(t, fixtJoinQuery1)
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require.Nil(t, err)
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err = NewWalker(log, ast).AddVisitor(typeSelectorNode, narrowTblSel).Walk()
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require.Nil(t, err)
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insp = NewInspector(log, ast)
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segs = ast.Segments()
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require.Equal(t, 4, len(segs))
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selSegs = insp.FindTablerSegments()
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require.Equal(t, 2, len(selSegs), "should be 2 selectable segments: the tbl selector segment, and the join segment")
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finalSelSeg, err = insp.FindFinalTablerSegment()
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require.Nil(t, err)
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require.Equal(t, selSegs[1], finalSelSeg)
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}
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