added specs for ABC::File and added tune_spec

abc_parser.gemspec

@@ -5,7 +5,8 @@ Gem::Specification.new do |spec|
   spec.version = '0.0.1'
   spec.date = '2014-08-05'
   spec.summary = 'ABC file parser'
-  spec.description = 'Converts ABC music files into Ruby objects for programatic use.'
+  spec.description = 'Converts ABC music files into Ruby objects for ' +
+    'programatic use.'
   spec.authors = ["Dominic Muller"]
   spec.email = '[email protected]'
   spec.files = [

lib/abc/file.rb

@@ -1,17 +1,43 @@
 
 module ABC
-  # An abc file consists of one or more abc tune transcriptions,
-  # optionally interspersed with free text and typeset text
-  # annotations. It may optionally start with a file header to
-  # set up default values for processing the file.
-  #
-  # The file header, abc tunes and text annotations are separated
-  # from each other by empty lines (also known as blank lines).
-  #
-  # An abc file with more than one tune in it is called an abc
-  # tunebook.
-  #
   class File
-
+    attr_reader :parsed, :version, :tunes, :header
+    def initialize(filepath)
+      @filepath = filepath
+      @file = ::File.open(@filepath, "r") {|f| f.read}
+      @parsed = false
+      parse
+    end
+    def parsed?
+      parsed
+    end
+    private
+    def parse
+      @sections = @file.split(/\n(?=\n)/)
+      @sections.each do |section|
+        case section_type(section)
+        when :tune
+          @tunes ||= []
+          @tunes << Tune.new(section)
+        when :file_header
+          @header = FileHeader.new(section)
+        else
+        end
+      end
+      @parsed = true
+    end
+    def section_type(section)
+      type = :unknown
+      section.each_line do |line|
+        if m = line.match(/%abc(-(?<version>[\d.]+))?/)
+          @version ||= m[:version].to_f
+        end
+        case line
+        when /^H:|^O:/ then type = :file_header
+        when /^X:|^T:|^K:/ then type = :tune
+        end
+      end
+      type
+    end
   end
 end

lib/abc/file_header.rb

@@ -18,7 +18,9 @@ module ABC
   # distributed.
   #
   class FileHeader
-
+    def initialize(header)
+
+    end
   end
 
 end

lib/abc/tune.rb

@@ -1,28 +1,8 @@
 
 module ABC
-  # An abc tune itself consists of a tune header and a tune body,
-  # terminated by an empty line or the end of the file. It may
-  # also contain comment lines or stylesheet directives.
-  #
-  # The tune header is composed of several information field lines,
-  # which are further discussed in information fields. The tune
-  # header should start with an X:(reference number) field followed
-  # by a T:(title) field and finish with a K:(key) field.
-  #
-  # The tune body, which contains the music code, follows immediately
-  # after. Certain fields may also be used inside the tune body - see
-  # use of fields within the tune body.
-  #
-  # It is legal to write an abc tune without a tune body. This
-  # feature can be used to document tunes without transcribing them.
-  #
-  # Abc music code lines are those lines in the tune body which give
-  # notes, bar lines and other musical symbols - see the tune body
-  # for details. In effect, music code is the contents of any line
-  # which is not an information field, stylesheet directive or
-  # comment line. 
-  #
   class Tune
+    def initialize(tune)
 
+    end
   end
 end

lib/abc_parser.rb

@@ -1,4 +1,4 @@
-
+require 'pry'
 require 'abc/file'
 require 'abc/file_header'
 require 'abc/tune'

spec/abc/file_spec.rb

@@ -1,5 +1,31 @@
 require 'spec_helper'
 
+# An abc file consists of one or more abc tune transcriptions,
+# optionally interspersed with free text and typeset text
+# annotations. It may optionally start with a file header to
+# set up default values for processing the file.
+#
+# The file header, abc tunes and text annotations are separated
+# from each other by empty lines (also known as blank lines).
+#
+# An abc file with more than one tune in it is called an abc
+# tunebook.
+#
 describe ABC::File do
-  it "loads the file without error"
+  let(:file) {ABC::File.new("spec/fixtures/english.abc")}
+  it "should load without error" do
+    expect {file}.not_to raise_error
+  end
+  it "should be parsed" do
+    expect(file).to be_parsed
+  end
+  it "should have a format version of 2.1" do
+    expect(file.version).to eq 2.1
+  end
+  it "should have a file header" do
+    expect(file.header)
+  end
+  it "should have 3 tunes" do
+    expect(file.tunes.count).to eq 3
+  end
 end

spec/abc/tune_spec.rb

@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+# An abc tune itself consists of a tune header and a tune body,
+# terminated by an empty line or the end of the file. It may
+# also contain comment lines or stylesheet directives.
+#
+# The tune header is composed of several information field lines,
+# which are further discussed in information fields. The tune
+# header should start with an X:(reference number) field followed
+# by a T:(title) field and finish with a K:(key) field.
+#
+# The tune body, which contains the music code, follows immediately
+# after. Certain fields may also be used inside the tune body - see
+# use of fields within the tune body.
+#
+# It is legal to write an abc tune without a tune body. This
+# feature can be used to document tunes without transcribing them.
+#
+# Abc music code lines are those lines in the tune body which give
+# notes, bar lines and other musical symbols - see the tune body
+# for details. In effect, music code is the contents of any line
+# which is not an information field, stylesheet directive or
+# comment line. 
+#
+describe ABC::Tune do
+
+end