fix 0.7 warnings and 0.6 iteration

src/NCDatasets.jl

@@ -1150,15 +1150,15 @@ Base.start(a::NCIterable) = keys(a)
 Base.done(a::NCIterable,state) = length(state) == 0
 Base.next(a::NCIterable,state) = (state[1] => a[popfirst!(state)], state)
 
-
+@static if VERSION >= v"0.7.0-beta.0"
 function Base.iterate(a::NCIterable, state = keys(a))
     if length(state) == 0
         return nothing
     end
 
     return (state[1] => a[popfirst!(state)], state)
 end
-
+end
 
 """
     escape(val)

test/test_writevar.jl

@@ -1,3 +1,14 @@
+using NCDatasets
+if VERSION >= v"0.7.0-beta.0"
+    using Test
+    using Dates
+    using Printf
+else
+    using Base.Test
+end
+
+using Compat
+
 sz = (4,5)
 filename = tempname()
 #filename = "/tmp/test-9.nc"
@@ -75,45 +86,49 @@ v = NCDatasets.defVar(ds,"var-Char",Char,("lon","lat"))
 
 # write array (without transformation)
 v.var[:,:] = fill('a',size(v))
-@test all(v.var[:,:][:] .== 'a')
+@test all(i -> i == 'a',v.var[:,:][:])
 
 # write scalar
 v.var[:,:] = 'b'
-@test all(v.var[:,:][:] .== 'b')
+@test all(i -> i == 'b',v.var[:,:][:])
 
 # write array (with transformation)
 v[:,:] = fill('c',size(v))
-@test all(v[:,:][:] .== 'c')
+@test all(i -> i == 'c',v.var[:,:][:])
 
 # write scalar
 v[:,:] = 'd'
-@test all(v[:,:][:] .== 'd')
+@test all(i -> i == 'd',v.var[:,:][:])
 
 # using StepRange as index
 # write array (without transformation)
 v.var[1:end,1:end] = fill('e',size(v))
-@test all(v.var[1:end,1:end][:] .== 'e')
+@test all(i -> i == 'e',v.var[:,:][:])
 
 # write scalar
 v.var[1:end,1:end] = 'f'
-@test all(v.var[1:end,1:end][:] .== 'f')
+@test all(i -> i == 'f',v.var[:,:][:])
 
 # write array (with transformation)
 v[1:end,1:end] = fill('g',size(v))
-@test all(v[1:end,1:end][:] .== 'g')
+@test all(i -> i == 'g',v.var[:,:][:])
 
 # write scalar
 v[1:end,1:end] = 'h'
-@test all(v[1:end,1:end][:] .== 'h')
+@test all(i -> i == 'h',v.var[:,:][:])
 
 # write with StepRange
 v[:,:] = 'h'
 ref = fill('h',sz)
 
-ref[1:2:end,1:2:end] .= 'i'
+if VERSION >= v"0.7.0-beta.0"
+    ref[1:2:end,1:2:end] .= Ref('i')
+else
+    ref[1:2:end,1:2:end] = 'i'
+end
 v[1:2:end,1:2:end] = 'i'
-@test v[:,:] == ref
 
+@test v[:,:] == ref
 
 
 ref = ['a'+i+2*j for i = 0:sz[1]-1, j= 0:sz[2]-1]
@@ -130,4 +145,3 @@ v[:,:] = ref
 
 NCDatasets.close(ds)
 
-