From 482eee1f6b99acb2d4034924a33b81f80f9ec954 Mon Sep 17 00:00:00 2001
From: Jay Hayes <ur@iamvery.com>
Date: Fri, 23 Dec 2016 08:19:21 -0600
Subject: [PATCH 1/3] whitespace

---
 lib/display/colours.ex        | 2 --
 test/display/failure_test.exs | 4 ++--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/display/colours.ex b/lib/display/colours.ex
index d76a0fd..3b5baf3 100644
--- a/lib/display/colours.ex
+++ b/lib/display/colours.ex
@@ -27,8 +27,6 @@ end
 
 defmodule Display.Uncoloured do
   def red(str), do: str
-
   def cyan(str), do: str
-
   def green(str), do: str
 end
diff --git a/test/display/failure_test.exs b/test/display/failure_test.exs
index 6d97c0d..d3dce26 100644
--- a/test/display/failure_test.exs
+++ b/test/display/failure_test.exs
@@ -5,13 +5,13 @@ defmodule FailureTests do
   test "assertion failure with proper expression" do
     error = error(%ExUnit.AssertionError{expr: "hi"})
 
-   assert Failure.format_failure(error) == "Assertion failed in some_file.ex:42\n\"hi\"\n"
+    assert Failure.format_failure(error) == "Assertion failed in some_file.ex:42\n\"hi\"\n"
   end
 
   test "assertion failure with message" do
     error = error(%ExUnit.AssertionError{expr: :ex_unit_no_meaningful_value, message: "hola"})
 
-   assert Failure.format_failure(error) == "Assertion failed in some_file.ex:42\nhola\n"
+    assert Failure.format_failure(error) == "Assertion failed in some_file.ex:42\nhola\n"
   end
 
   defp error(error) do

From 08973f4b54b5446ca66cda9542992401ecf07be8 Mon Sep 17 00:00:00 2001
From: Jay Hayes <ur@iamvery.com>
Date: Fri, 23 Dec 2016 08:28:16 -0600
Subject: [PATCH 2/3] Add test for equality failure

This also revealed that the "test painter" has a missing interface,
yellow/0. Fixed!

[#144]
---
 lib/display/colours.ex        |  1 +
 test/display/failure_test.exs | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/lib/display/colours.ex b/lib/display/colours.ex
index 3b5baf3..62efcdd 100644
--- a/lib/display/colours.ex
+++ b/lib/display/colours.ex
@@ -29,4 +29,5 @@ defmodule Display.Uncoloured do
   def red(str), do: str
   def cyan(str), do: str
   def green(str), do: str
+  def yellow(str), do: str
 end
diff --git a/test/display/failure_test.exs b/test/display/failure_test.exs
index d3dce26..da8d242 100644
--- a/test/display/failure_test.exs
+++ b/test/display/failure_test.exs
@@ -14,6 +14,17 @@ defmodule FailureTests do
     assert Failure.format_failure(error) == "Assertion failed in some_file.ex:42\nhola\n"
   end
 
+  test "equality failure" do
+    error = error(%ExUnit.AssertionError{expr: quote(do: :lol == :wat), left: :lol, right: :wat})
+
+    assert Failure.format_failure(error) == """
+                                            Assertion failed in some_file.ex:42
+                                            :lol == :wat
+
+                                            left:  :lol
+                                            right: :wat
+                                            """
+  end
   defp error(error) do
     %{
       error: error,

From 4bb0b06471c70c52ac26717d62821e088aac7f63 Mon Sep 17 00:00:00 2001
From: Jay Hayes <ur@iamvery.com>
Date: Fri, 23 Dec 2016 08:19:30 -0600
Subject: [PATCH 3/3] Format match? failures more elegantly

[#144]
---
 lib/display/failure.ex        |  6 ++++++
 test/display/failure_test.exs | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/lib/display/failure.ex b/lib/display/failure.ex
index 855feff..63ed22e 100644
--- a/lib/display/failure.ex
+++ b/lib/display/failure.ex
@@ -26,6 +26,12 @@ defmodule Display.Failure do
   defp format_inequality(message, %{left: @no_value, right: @no_value}) do
     message
   end
+  defp format_inequality(message, %{left: @no_value, right: match_value}) do
+    """
+    #{message}
+    value does not match: #{match_value |> inspect |> Paint.yellow}
+    """
+  end
   defp format_inequality(message, %{left: left, right: right}) do
     """
     #{message}
diff --git a/test/display/failure_test.exs b/test/display/failure_test.exs
index da8d242..4f9cea3 100644
--- a/test/display/failure_test.exs
+++ b/test/display/failure_test.exs
@@ -25,6 +25,18 @@ defmodule FailureTests do
                                             right: :wat
                                             """
   end
+
+  test "match failure" do
+    error = error(%ExUnit.AssertionError{expr: quote(do: match?(:lol,:wat)), right: :wat})
+
+    assert Failure.format_failure(error) == """
+                                            Assertion failed in some_file.ex:42
+                                            match?(:lol, :wat)
+
+                                            value does not match: :wat
+                                            """
+  end
+
   defp error(error) do
     %{
       error: error,