pitrou commented on code in PR #14223:
URL: https://github.com/apache/arrow/pull/14223#discussion_r1093466701
##########
go/arrow/array/encoded_test.go:
##########
@@ -271,3 +272,38 @@ func TestREEBuilderOverflow(t *testing.T) {
})
}
}
+
+func TestLogicalRunEndsValuesArray(t *testing.T) {
+ mem := memory.NewCheckedAllocator(memory.DefaultAllocator)
+ defer mem.AssertSize(t, 0)
+
+ bldr := array.NewRunEndEncodedBuilder(mem, arrow.PrimitiveTypes.Int16,
arrow.BinaryTypes.String)
+ defer bldr.Release()
+
+ valBldr := bldr.ValueBuilder().(*array.StringBuilder)
+ // produces run-ends 1, 2, 4, 6, 10, 1000, 1750, 2000
+ bldr.AppendRuns([]uint64{1, 1, 2, 2, 4, 990, 750, 250})
+ valBldr.AppendValues([]string{"a", "b", "c", "d", "e", "f", "g", "h"},
nil)
+
+ arr := bldr.NewRunEndEncodedArray()
+ defer arr.Release()
+
+ sl := array.NewSlice(arr, 150, 1650)
+ defer sl.Release()
+
+ assert.EqualValues(t, 150, sl.Data().Offset())
+ assert.EqualValues(t, 1500, sl.Len())
+
+ logicalValues := sl.(*array.RunEndEncoded).LogicalValuesArray()
+ defer logicalValues.Release()
+ logicalRunEnds := sl.(*array.RunEndEncoded).LogicalRunEndsArray(mem)
+ defer logicalRunEnds.Release()
+
+ expectedValues, _, err := array.FromJSON(mem, arrow.BinaryTypes.String,
strings.NewReader(`["f", "g"]`))
+ require.NoError(t, err)
+ defer expectedValues.Release()
+ expectedRunEnds := []int16{850, 1500}
+
+ assert.Truef(t, array.Equal(logicalValues, expectedValues), "expected:
%s\ngot: %s", expectedValues, logicalValues)
+ assert.Equal(t, expectedRunEnds,
logicalRunEnds.(*array.Int16).Int16Values())
+}
Review Comment:
Nice test, do you also want to add tests for an empty array, and/or an
offset equal to the array length?
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