[Stdlib, Spec-lib] Myst spec failures now includes path to the failure

src/myst/syntax/lexer.cr

@@ -397,6 +397,11 @@ module Myst
         when "\\n"  then '\n'
         when "\\\"" then '"'
         when "\\t"  then '\t'
+        when "\\e"  then '\e'
+        when "\\r"  then '\r'
+        when "\\f"  then '\f'
+        when "\\v"  then '\v'
+        when "\\b"  then '\b'
         when "\\0"  then '\0'
         end
       end

stdlib/colored.mt

@@ -0,0 +1,39 @@
+defmodule Color
+  def ansi_from_symbol(sym)
+    when sym == :black
+      return ANSI_BLACK
+    when sym == :red
+      return ANSI_RED
+    when sym == :green
+      return ANSI_GREEN
+    when sym == :yellow
+      return ANSI_YELLOW
+    when sym == :blue
+      return ANSI_BLUE
+    when sym == :purple
+      return ANSI_PURPLE
+    when sym == :cyan
+      return ANSI_CYAN
+    when sym == :white
+      return ANSI_WHITE
+    else
+      raise ":\"<(sym)>\" is not a valid color"
+    end
+  end
+
+  ANSI_RESET  = "\e[0m"
+
+  ANSI_BLACK  = "\e[0;30m"
+  ANSI_RED    = "\e[0;31m"
+  ANSI_GREEN  = "\e[0;32m"
+  ANSI_YELLOW = "\e[0;33m"
+  ANSI_BLUE   = "\e[0;34m"
+  ANSI_PURPLE = "\e[0;35m"
+  ANSI_CYAN   = "\e[0;36m"
+  ANSI_WHITE  = "\e[0;37m"
+
+  def colored(string, sym)
+    color = ansi_from_symbol(sym) 
+    "<(color)><(string.to_s)><(ANSI_RESET)>"
+  end
+end

stdlib/spec.mt

@@ -1,6 +1,10 @@
 require "./spec/dsl.mt"
 require "./spec/errors.mt"
 require "./spec/single_spec.mt"
+require "./spec/describe_container.mt"
+require "./colored.mt"
+
+include Spec
 
 # Spec
 #
@@ -24,6 +28,9 @@ require "./spec/single_spec.mt"
 # Calls). This should be addressed before too long, since it's a fairly common
 # use case, but a basic Spec library does not require it.
 defmodule Spec
+  describe_stack = []
+  include DSL
+
   def it(name, &block)
     spec = %SingleSpec{name}
     spec.run{ block() }
@@ -39,6 +46,8 @@ defmodule Spec
 
 
   def describe(name, &block)
+    describe_stack.push(%DescribeContainer{name})
     block()
+    describe_stack.pop
   end
 end

stdlib/spec/describe_container.mt

@@ -0,0 +1,17 @@
+defmodule Spec
+  deftype DescribeContainer
+    def initialize(name : String)
+      @name = name      
+    end
+
+    def name; @name; end
+
+    def get_path(current : String)
+      when !describe_stack.empty?
+        return describe_stack.pop.get_path("<(@name)> <(current)>")
+      else
+        "<(@name)> <(current)>"
+      end
+    end
+  end
+end

stdlib/spec/single_spec.mt

@@ -9,9 +9,12 @@ defmodule Spec
 
     def run(&block)
       block()
-      STDOUT.print(".")
+      STDOUT.print(Color.colored(".", :green))
     rescue failure
-      STDOUT.puts(failure)
+      STDOUT.puts("\n")
+      STDOUT.puts(Color.colored("  <(describe_stack.pop.get_path(@name))>", :red))
+      STDOUT.puts(Color.colored("    <(failure)>", :red))
+      STDOUT.puts
       exit(1)
     end
   end