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require File.expand_path(File.join('.','spec_helper'), File.dirname(__FILE__))
include NumRu
dir = File.expand_path(File.join('..','data'), File.dirname(__FILE__))
GribData = {
File.join(dir, 'regular_gaussian_surface.grib1') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>2.4552479553e2}}
},
File.join(dir, 'regular_gaussian_surface.grib2') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>2.4552479553e2}}
},
File.join(dir, 'regular_gaussian_model_level.grib1') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>1.9907820129e2}}
},
File.join(dir, 'regular_gaussian_model_level.grib2') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>1.9907820129e2}}
},
File.join(dir, 'regular_gaussian_pressure_level.grib1') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>2.4746011353e2}}
},
File.join(dir, 'regular_gaussian_pressure_level.grib2') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>2.4746011353e2}}
},
File.join(dir, 'regular_gaussian_pressure_level_constant.grib1') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>1.0}}
},
File.join(dir, 'regular_gaussian_pressure_level_constant.grib2') =>
{"t"=>{:dims=>["lon","lat"], :shape=>[128,64], :val=>{[0,0]=>1.0}}
},
File.join(dir, 'regular_latlon_surface.grib1') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[16,31], :val=>{[0,0]=>279.0}}
},
File.join(dir, 'regular_latlon_surface.grib2') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[16,31], :val=>{[0,0]=>279.0}}
},
File.join(dir, 'regular_latlon_surface_constant.grib1') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[16,31], :val=>{[0,0]=>1.0}}
},
File.join(dir, 'regular_latlon_surface_constant.grib2') =>
{"2t"=>{:dims=>["lon","lat"], :shape=>[16,31], :val=>{[0,0]=>1.0}}
},
File.join(dir, 'tp_ecmwf.grib') =>
{"tp"=>{:dims=>["lon","lat","step"], :shape=>[16,31,4], :val=>{[0,0,0]=>2.0546913147e-3}}
}
}
fname_not_exist = 'not_exist'
describe NumRu::Grib do
describe 'Grib.is_a_Grib?' do
it 'returns whether the specific file is a GRIB1/2 file' do
GribData.each do |fname, hash|
expect(NumRu::Grib.is_a_Grib?(fname)).to eq true
end
end
end
describe 'Grib.open' do
before { @files = [] }
after { @files.each{|file| file.close} }
it 'returns Grib object' do
GribData.each do |fname, hash|
file = NumRu::Grib.open(fname)
expect(file).to be_instance_of(NumRu::Grib)
@files.push file
end
end
it 'raise exception when file name which does not exist is given' do
expect { NumRu::Grib.open(fname_not_exist) }.to raise_error(RuntimeError)
end
end
describe '#close' do
before do
@files = []
GribData.each{|fname,hash| @files.push NumRu::Grib.open(fname) }
end
it do
@files.each do |file|
expect {file.close}.not_to raise_error
end
end
end
describe 'instance methods' do
before do
@files = {}
GribData.each{|fname,hash| @files[fname] = NumRu::Grib.open(fname) }
end
after do
@files.each{|fname,file| file.close}
end
it '#path returns path' do
@files.each do |fname,file|
expect( file.path ).to eq fname
end
end
it '#var_names returns Array of variable names' do
@files.each do |fname, file|
expect( file.var_names ).to eq GribData[fname].keys
end
end
it '#var returns GribVar object' do
@files.each do |fname, file|
GribData[fname].each do |vname, hash|
expect( file.var(vname) ).to be_instance_of NumRu::GribVar
end
end
end
end
end
describe NumRu::GribVar do
before do
@files = []
@vars = Hash.new
GribData.each do |fname,vars|
file = NumRu::Grib.open(fname)
@files.push file
vars.each{|vname, hash| @vars[file.var(vname)] = hash}
end
end
after { @files.each{|file| file.close}}
it '#rank returns rank' do
@vars.each{|var,hash| expect(var.rank).to eq hash[:shape].length}
end
it '#total returns total length' do
@vars.each{|var,hash| expect(var.total).to eq hash[:shape].inject(1,:*)}
end
it '#dim_names returns Array of dimension names' do
@vars.each{|var,hash| expect(var.dim_names).to eq hash[:dims]}
end
it '#shape returns Array of shape' do
@vars.each{|var,hash| expect(var.shape).to eq hash[:shape]}
end
it '#dim returns GribDim' do
@vars.each do |var,hash|
hash[:dims].each{|dname| expect(var.dim(dname)).to be_instance_of NumRu::GribDim}
end
end
it '#att_names returns Array of attribute names' do
@vars.each{|var,hash| expect(var.att_names).to be_instance_of Array}
end
it '#att returns attribute value' do
@vars.each do |var,hash|
var.att_names.each{|aname| expect(var.att(aname)).to_not eq nil }
end
end
it '#typecode returns type code' do
@vars.each{|var,hash| expect(var.typecode).to be_instance_of Integer}
end
it '#missing_value returns missing value' do
@vars.each{|var,hash| expect(var.missing_value).to be_kind_of Numeric}
end
it '#get returns value' do
@vars.each do |var,hash|
hash[:val].each do |idx,val|
v = var.get[*idx]
expect((v-val).abs/((v+val)/2)).to be < 1e-10
end
end
end
end
describe NumRu::GribDim do
before do
@files = []
@dims = Hash.new
GribData.each do |fname, vars|
file = NumRu::Grib.open(fname)
@files.push file
vars.each do |vname, hash|
var = file.var(vname)
hash[:dims].each_with_index do |dname,i|
@dims[var.dim(dname)] = hash[:shape][i]
end
end
end
end
after do
@files.each{|file| file.close}
end
it '#length returns length' do
@dims.each{|dim,len| expect(dim.length).to eq len}
end
it '#val returns value' do
@dims.each do |dim,len|
expect(dim.val).to be_instance_of NArray
expect(dim.val.length).to eq len
end
end
it '#typecode returns typecode' do
@dims.each{|dim,len| expect(dim.typecode).to be_instance_of Integer}
end
it '#att_names returns Array of attribute names' do
@dims.each{|dim,len| expect(dim.att_names).to be_instance_of Array}
end
it '#att returns attributes value' do
@dims.each do |dim,len|
dim.att_names.each{|aname| expect(dim.att(aname)).to_not eq nil }
end
end
end
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