Disable color testing when color is not supported (#2847)

Author: bkamins

test/io.jl

@@ -630,23 +630,26 @@ end
        8 │     8
        9 │     9  #undef"""
 
-    io = IOBuffer()
-    show(IOContext(io, :color => true), df)
-    str = String(take!(io))
-    @test str == """
-    \e[1m9×2 DataFrame\e[0m
-    \e[1m Row \e[0m│\e[1m A     \e[0m\e[1m B                                 \e[0m
-    \e[1m     \e[0m│\e[90m Int64 \e[0m\e[90m Any                               \e[0m
-    ─────┼──────────────────────────────────────────
-       1 │     1 \e[90m 9×2 DataFrame                     \e[0m
-       2 │     2 \e[90m 2-element DataFrameRow            \e[0m
-       3 │     3 \e[90m 1×2 SubDataFrame                  \e[0m
-       4 │     4 \e[90m 9-element DataFrameRows           \e[0m
-       5 │     5 \e[90m 2-element DataFrameColumns        \e[0m
-       6 │     6 \e[90m GroupedDataFrame with 9 groups b… \e[0m
-       7 │     7 \e[90m missing                           \e[0m
-       8 │     8 \e[90m                                   \e[0m
-       9 │     9 \e[90m #undef                            \e[0m"""
+    # TODO: update when https://github.com/KristofferC/Crayons.jl/issues/47 is resolved
+    if VERSION >= v"1.6" && Base.get_have_color()
+        io = IOBuffer()
+        show(IOContext(io, :color => true), df)
+        str = String(take!(io))
+        @test str == """
+        \e[1m9×2 DataFrame\e[0m
+        \e[1m Row \e[0m│\e[1m A     \e[0m\e[1m B                                 \e[0m
+        \e[1m     \e[0m│\e[90m Int64 \e[0m\e[90m Any                               \e[0m
+        ─────┼──────────────────────────────────────────
+           1 │     1 \e[90m 9×2 DataFrame                     \e[0m
+           2 │     2 \e[90m 2-element DataFrameRow            \e[0m
+           3 │     3 \e[90m 1×2 SubDataFrame                  \e[0m
+           4 │     4 \e[90m 9-element DataFrameRows           \e[0m
+           5 │     5 \e[90m 2-element DataFrameColumns        \e[0m
+           6 │     6 \e[90m GroupedDataFrame with 9 groups b… \e[0m
+           7 │     7 \e[90m missing                           \e[0m
+           8 │     8 \e[90m                                   \e[0m
+           9 │     9 \e[90m #undef                            \e[0m"""
+    end
 
     io = IOBuffer()
     show(io, MIME("text/html"), df)

test/show.jl

@@ -215,26 +215,29 @@ end
 end
 
 @testset "Test colors and non-standard values: missing and nothing" begin
-    df = DataFrame(Fish = ["Suzy", "Amir"], Mass = [1.5, missing])
-    @test sprint(show, df, context=:color=>true) == """
-        \e[1m2×2 DataFrame\e[0m
-        \e[1m Row \e[0m│\e[1m Fish   \e[0m\e[1m Mass      \e[0m
-        \e[1m     \e[0m│\e[90m String \e[0m\e[90m Float64?  \e[0m
-        ─────┼───────────────────
-           1 │ Suzy          1.5
-           2 │ Amir   \e[90m missing   \e[0m"""
-
-    df = DataFrame(A = [:Symbol, missing, :missing],
-                   B = [missing, "String", "missing"],
-                   C = [:missing, "missing", missing])
-    @test sprint(show, df, context=:color=>true) == """
-        \e[1m3×3 DataFrame\e[0m
-        \e[1m Row \e[0m│\e[1m A       \e[0m\e[1m B       \e[0m\e[1m C       \e[0m
-        \e[1m     \e[0m│\e[90m Symbol? \e[0m\e[90m String? \e[0m\e[90m Any     \e[0m
-        ─────┼───────────────────────────
-           1 │ Symbol  \e[90m missing \e[0m missing
-           2 │\e[90m missing \e[0m String   missing
-           3 │ missing  missing \e[90m missing \e[0m"""
+    # TODO: update when https://github.com/KristofferC/Crayons.jl/issues/47 is resolved
+    if VERSION >= v"1.6" && Base.get_have_color()
+        df = DataFrame(Fish = ["Suzy", "Amir"], Mass = [1.5, missing])
+        @test sprint(show, df, context=:color=>true) == """
+            \e[1m2×2 DataFrame\e[0m
+            \e[1m Row \e[0m│\e[1m Fish   \e[0m\e[1m Mass      \e[0m
+            \e[1m     \e[0m│\e[90m String \e[0m\e[90m Float64?  \e[0m
+            ─────┼───────────────────
+               1 │ Suzy          1.5
+               2 │ Amir   \e[90m missing   \e[0m"""
+
+        df = DataFrame(A = [:Symbol, missing, :missing],
+                       B = [missing, "String", "missing"],
+                       C = [:missing, "missing", missing])
+        @test sprint(show, df, context=:color=>true) == """
+            \e[1m3×3 DataFrame\e[0m
+            \e[1m Row \e[0m│\e[1m A       \e[0m\e[1m B       \e[0m\e[1m C       \e[0m
+            \e[1m     \e[0m│\e[90m Symbol? \e[0m\e[90m String? \e[0m\e[90m Any     \e[0m
+            ─────┼───────────────────────────
+               1 │ Symbol  \e[90m missing \e[0m missing
+               2 │\e[90m missing \e[0m String   missing
+               3 │ missing  missing \e[90m missing \e[0m"""
+    end
 
     df_nothing = DataFrame(A = [1.0, 2.0, 3.0], B = ["g", "g", nothing])
     @test sprint(show, df_nothing) == """