From 1aa1202344c1a33d07a7a2341e9e459c6524ea61 Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Mon, 15 Feb 2021 20:07:26 +0000
Subject: [PATCH 1/8] Support anything that can save as PNG

---
 Project.toml                |   4 +++-
 src/fileio.jl               |  10 ++++++++++
 src/test_reference.jl       |   2 +-
 test/references/heatmap.png | Bin 0 -> 12877 bytes
 test/references/scatter.png | Bin 0 -> 11051 bytes
 test/runtests.jl            |   6 ++++++
 6 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 test/references/heatmap.png
 create mode 100644 test/references/scatter.png

diff --git a/Project.toml b/Project.toml
index 8ff8e07..ec0e526 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,6 +23,7 @@ ImageCore = "0.8.1"
 ImageInTerminal = "0.3, 0.4"
 ImageMagick = "0.7, 1"
 ImageTransformations = "0.8"
+Plots = "1.4.3"
 TestImages = "0.6, 1"
 julia = "1"
 
@@ -31,7 +32,8 @@ CSVFiles = "5d742f6a-9f54-50ce-8119-2520741973ca"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
 ImageTransformations = "02fcd773-0e25-5acc-982a-7f6622650795"
+Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 TestImages = "5e47fb64-e119-507b-a336-dd2b206d9990"
 
 [targets]
-test = ["CSVFiles", "DataFrames", "ImageMagick", "ImageTransformations", "TestImages"]
+test = ["CSVFiles", "DataFrames", "ImageMagick", "ImageTransformations", "Plots", "TestImages"]
diff --git a/src/fileio.jl b/src/fileio.jl
index 2866d61..80d13c8 100644
--- a/src/fileio.jl
+++ b/src/fileio.jl
@@ -64,6 +64,16 @@ function _convert(
     return join(strs,'\n')
 end
 
+# PNG
+function _convert(::Type{<:DataFormat{:PNG}}, data)::AbstractArray{<:Colorant}
+    mktempdir() do dir
+        filename = File{DataFormat{:PNG}}(joinpath(dir, "inconversion.png"))
+        savefile(filename, data)
+        load(filename)
+    end
+end
+_convert(::Type{<:DataFormat{:PNG}}, img::AbstractArray{<:Colorant}; kw...) = img
+
 # SHA256
 _convert(::Type{DataFormat{:SHA256}}, x; kw...) = bytes2hex(sha256(string(x)))
 function _convert(::Type{DataFormat{:SHA256}}, img::AbstractArray{<:Colorant}; kw...)
diff --git a/src/test_reference.jl b/src/test_reference.jl
index 211f510..ff50f8e 100644
--- a/src/test_reference.jl
+++ b/src/test_reference.jl
@@ -122,7 +122,7 @@ function test_reference(
     end
 
     # file exists
-    reference = loadfile(T, file)
+    reference = loadfile(typeof(actual), file)
 
     if equiv === nothing
         # generally, `reference` and `actual` are of the same type after preprocessing
diff --git a/test/references/heatmap.png b/test/references/heatmap.png
new file mode 100644
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literal 0
HcmV?d00001

diff --git a/test/runtests.jl b/test/runtests.jl
index f53377f..720c3b0 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,5 +1,6 @@
 using Test
 using ImageInTerminal, TestImages, ImageCore, ImageTransformations
+using Plots
 using Random
 
 if isinteractive()
@@ -120,6 +121,11 @@ end
     @test_throws Exception @test_reference "references/camera.png" camera # unequal size
 end
 
+@testset "Plots as PNG images" begin
+    @test_reference "references/heatmap.png" heatmap([1 0; 0 1])
+    @test_reference "references/scatter.png" scatter([(0,0),(1,0),(0,1),(1,1)],ms=8)
+end
+
 using DataFrames, CSVFiles
 @testset "DataFrame as CSV" begin
     @test_reference "references/dataframe.csv" DataFrame(v1=[1,2,3], v2=["a","b","c"])

From 1882c26040c74fe18a3fc0049649ffd56f729cef Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Mon, 15 Feb 2021 21:01:42 +0000
Subject: [PATCH 2/8] usual actual not raw_actual to decide rendermode

Revert "usual actual not raw_actual to decide rendermode"

This reverts commit 9cc6d5377ef047b4feae25c627a4c0b562e317fc.

render actual
---
 src/test_reference.jl | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/test_reference.jl b/src/test_reference.jl
index ff50f8e..a15234a 100644
--- a/src/test_reference.jl
+++ b/src/test_reference.jl
@@ -100,19 +100,20 @@ function test_reference(
     path = file.filename
     dir, filename = splitdir(path)
 
+    actual = _convert(F, raw_actual; kw...)
+
     # infer the default rendermode here
     # since `nothing` is always passed to this method from
     # test_reference(filename::AbstractString, raw_actual; kw...)
     if rendermode === nothing
-        rendermode = default_rendermode(F, raw_actual)
+        rendermode = default_rendermode(F, actual)
     end
 
-    actual = _convert(F, raw_actual; kw...)
     # preprocessing when reference file doesn't exists
     if !isfile(path)
         @info("Reference file for \"$filename\" does not exist. It will be created")
         # TODO: move encoding out from render
-        render(rendermode, raw_actual)
+        render(rendermode, actual)
 
         mkpath(dir)
         savefile(file, actual)

From f2cb1aba52a9586f68d4b615c97da0fbac2deb26 Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Tue, 16 Feb 2021 16:17:22 +0000
Subject: [PATCH 3/8] try ImageIO to see if better on Ubuntu for PNGs

---
 Project.toml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Project.toml b/Project.toml
index ec0e526..4025276 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,6 @@ Distances = "0.7, 0.8, 0.9, 0.10"
 FileIO = "1"
 ImageCore = "0.8.1"
 ImageInTerminal = "0.3, 0.4"
-ImageMagick = "0.7, 1"
 ImageTransformations = "0.8"
 Plots = "1.4.3"
 TestImages = "0.6, 1"
@@ -30,10 +29,11 @@ julia = "1"
 [extras]
 CSVFiles = "5d742f6a-9f54-50ce-8119-2520741973ca"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+ImageIO = "82e4d734-157c-48bb-816b-45c225c6df19"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
 ImageTransformations = "02fcd773-0e25-5acc-982a-7f6622650795"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 TestImages = "5e47fb64-e119-507b-a336-dd2b206d9990"
 
 [targets]
-test = ["CSVFiles", "DataFrames", "ImageMagick", "ImageTransformations", "Plots", "TestImages"]
+test = ["CSVFiles", "DataFrames", "ImageIO", "ImageMagick", "ImageTransformations", "Plots", "TestImages"]

From 58a4b0ff745ed44aa59f68371f3db47db65be9f3 Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Tue, 16 Feb 2021 16:17:22 +0000
Subject: [PATCH 4/8] Revert "try ImageIO to see if better on Ubuntu for PNGs"

This reverts commit f2cb1aba52a9586f68d4b615c97da0fbac2deb26.
---
 Project.toml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Project.toml b/Project.toml
index 4025276..ec0e526 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,6 +21,7 @@ Distances = "0.7, 0.8, 0.9, 0.10"
 FileIO = "1"
 ImageCore = "0.8.1"
 ImageInTerminal = "0.3, 0.4"
+ImageMagick = "0.7, 1"
 ImageTransformations = "0.8"
 Plots = "1.4.3"
 TestImages = "0.6, 1"
@@ -29,11 +30,10 @@ julia = "1"
 [extras]
 CSVFiles = "5d742f6a-9f54-50ce-8119-2520741973ca"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
-ImageIO = "82e4d734-157c-48bb-816b-45c225c6df19"
 ImageMagick = "6218d12a-5da1-5696-b52f-db25d2ecc6d1"
 ImageTransformations = "02fcd773-0e25-5acc-982a-7f6622650795"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 TestImages = "5e47fb64-e119-507b-a336-dd2b206d9990"
 
 [targets]
-test = ["CSVFiles", "DataFrames", "ImageIO", "ImageMagick", "ImageTransformations", "Plots", "TestImages"]
+test = ["CSVFiles", "DataFrames", "ImageMagick", "ImageTransformations", "Plots", "TestImages"]

From bb8431a6a6ce121f96736a1832bc294c7206a5dc Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Thu, 18 Feb 2021 16:54:48 +0000
Subject: [PATCH 5/8] Update src/fileio.jl

---
 src/fileio.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fileio.jl b/src/fileio.jl
index 80d13c8..1196129 100644
--- a/src/fileio.jl
+++ b/src/fileio.jl
@@ -64,7 +64,7 @@ function _convert(
     return join(strs,'\n')
 end
 
-# PNG
+# PNG  (Including for things that can be saved as PNGs like Plots.jl plots)
 function _convert(::Type{<:DataFormat{:PNG}}, data)::AbstractArray{<:Colorant}
     mktempdir() do dir
         filename = File{DataFormat{:PNG}}(joinpath(dir, "inconversion.png"))

From 44bf448e8fd927d53d0ebf859a490fd69dce1f59 Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Thu, 18 Feb 2021 16:57:20 +0000
Subject: [PATCH 6/8] lower tolerance

Co-authored-by: Johnny Chen <johnnychen94@hotmail.com>
---
 test/runtests.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/runtests.jl b/test/runtests.jl
index 720c3b0..190f864 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -122,7 +122,7 @@ end
 end
 
 @testset "Plots as PNG images" begin
-    @test_reference "references/heatmap.png" heatmap([1 0; 0 1])
+    @test_reference "references/heatmap.png" heatmap([1 0; 0 1]) by=psnr_equality(15)
     @test_reference "references/scatter.png" scatter([(0,0),(1,0),(0,1),(1,1)],ms=8)
 end
 

From 4f5c2d5c213751529b57e31c4c12a23890af628f Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Thu, 18 Feb 2021 17:00:23 +0000
Subject: [PATCH 7/8] Update src/fileio.jl

---
 src/fileio.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fileio.jl b/src/fileio.jl
index 1196129..3e18a25 100644
--- a/src/fileio.jl
+++ b/src/fileio.jl
@@ -64,7 +64,7 @@ function _convert(
     return join(strs,'\n')
 end
 
-# PNG  (Including for things that can be saved as PNGs like Plots.jl plots)
+# PNG  (Including images as arrays of colorants, and things like Plots.jl plots etc)
 function _convert(::Type{<:DataFormat{:PNG}}, data)::AbstractArray{<:Colorant}
     mktempdir() do dir
         filename = File{DataFormat{:PNG}}(joinpath(dir, "inconversion.png"))

From 96a6d45b7534e126e1e97aecb26693f13ddbbbfd Mon Sep 17 00:00:00 2001
From: Lyndon White <lyndon.white@invenialabs.co.uk>
Date: Sat, 20 Feb 2021 00:48:39 +0000
Subject: [PATCH 8/8] disable plot test on linux

---
 test/runtests.jl | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/test/runtests.jl b/test/runtests.jl
index 190f864..4de8ab0 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -122,8 +122,11 @@ end
 end
 
 @testset "Plots as PNG images" begin
-    @test_reference "references/heatmap.png" heatmap([1 0; 0 1]) by=psnr_equality(15)
-    @test_reference "references/scatter.png" scatter([(0,0),(1,0),(0,1),(1,1)],ms=8)
+    # Test disabled on linux because: https://github.com/JuliaPlots/Plots.jl/issues/2127
+    if !Sys.islinux()
+        @test_reference "references/heatmap.png" heatmap([1 0; 0 1]) by=psnr_equality(15)
+        @test_reference "references/scatter.png" scatter([(0,0),(1,0),(0,1),(1,1)], ms=8)
+    end
 end
 
 using DataFrames, CSVFiles