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Add tests for column selection and renaming for GroupedDataFrame #2586

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Dec 23, 2020
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Add tests for column selection and renaming for GroupedDataFrame #2586

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11de24f
add tests for column selection and renaming for GroupedDataFrame
bkamins Dec 23, 2020
e305dbc
Update test/grouping.jl
bkamins Dec 23, 2020
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22 changes: 22 additions & 0 deletions test/grouping.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -3230,6 +3230,28 @@ end
end
end

@testset "column selection and renaming" begin
df = DataFrame(id=[1, 1, 2, 3, 3, 1], x=1:6, y=11:16, z=21:26)
gdf = groupby_checked(df, :id)

@test combine(gdf, :x) == DataFrame(id=[1, 1, 1, 2, 3, 3], x=[1, 2, 6, 3, 4, 5])
@test combine(gdf, :x => :y ) == DataFrame(id=[1, 1, 1, 2, 3, 3], y=[1, 2, 6, 3, 4, 5])
@test combine(gdf, [:x, :y]) ==
DataFrame(id=[1, 1, 1, 2, 3, 3], x=[1, 2, 6, 3, 4, 5], y=[11, 12, 16, 13, 14, 15])
@test combine(gdf, [:x, :y], :z) ==
DataFrame(id=[1, 1, 1, 2, 3, 3], x=[1, 2, 6, 3, 4, 5],
y=[11, 12, 16, 13, 14, 15], z=[21, 22, 26, 23, 24, 25])
@test_throws ArgumentError combine(gdf, :x, :x)
@test_throws ArgumentError combine(gdf, :x => :y, :y)

@test select(gdf, :x) == select(df, :id, :x)
@test select(gdf, :x => :y) == select(df, :id, :x => :y)
@test select(gdf, [:x, :y]) == select(df, :id, [:x, :y])
@test select(gdf, [:x, :y], :z) == select(df, :id, [:x, :y], :z)
@test_throws ArgumentError select(gdf, :x, :x)
@test_throws ArgumentError select(gdf, :x => :y, :y)
end

@testset "corner cases of wrong transformation" begin
df = DataFrame(id=[1, 1, 2, 3, 3, 1], x=1:6)
gdf = groupby_checked(df, :id)
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