spec: spec_helpers

Author: krishpranav

spec/spec_helpers.cr

@@ -18,30 +18,67 @@
 # -----------------------------------------------------------------------
 
 def expect_diff(a, b)
-    a.should eq(b)
+  a.should eq(b)
 rescue error
-    fail diff(a, b)
+  fail diff(a, b)
 end
 
 def diff(a, b)
-    file1 = File.tempfile do |file|
-        file.puts a.strip
-        file.flush
-    end
-    
-    io = IO::Memory.new
+  file1 = File.tempfile do |file|
+    file.puts a.strip
+    file.flush
+  end
+
+  file2 = File.tempfile do |file|
+    file.puts b
+    file.flush
+  end
+
+  io = IO::Memory.new
 
-    Process.run("git", [
-        "--no-pages", "diff", "--no-index",
-        file1.path,
-    ], output: io)
+  Process.run("git", [
+    "--no-pager", "diff", "--no-index", "--color=always",
+    file1.path, file2.path,
+  ], output: io)
 
-    io.to_s
+  io.to_s
+ensure
+  file1.try &.delete
+  file2.try &.delete
 end
 
 def matches_template(template, expected)
-    expected = expected.uncolarize
+  expected =
+    expected.uncolorize
 
-    parts = template.split(/x*/)
+  parts =
+    template.split(/×+/)
 
-end
+  fills =
+    [] of String
+
+  parts.reduce(0) do |position, item|
+    unless index = expected.index(item, position)
+      raise <<-TEXT
+          TEMPLATE INVALID!
+  
+          TEMPLATE:
+          #{template}
+  
+          ITEM:
+          #{item}
+  
+          EXPECTED:
+          #{expected}
+          TEXT
+    end
+
+    fills << expected[position, index - position]
+    index + item.size
+  end
+
+  replaced =
+    parts.zip(fills).join { |part, fill| fill + part }
+
+  expect_diff(replaced, expected)
+end