expect --to-not-contain tests and fix

plugins/fish-spec/expect.fish

@@ -61,10 +61,10 @@ function expect
     case --to-not-contain
       set result 0
       for item in $actual
-        not contains -- "$item" $expected
+        contains -- "$item" $expected
           or set result $status
       end
-      test $result -eq 0
+      test $result -ne 0
     case --to-eq\*
       test "$expected" = "$actual"
   end

plugins/fish-spec/spec/expect.to_not_contain.spec.fish

@@ -0,0 +1,65 @@
+import plugins/fish-spec
+
+function describe_to_not_contain -d 'expect --to-not-contain'
+  function before_each
+    set -e result
+  end
+
+  function it_returns_1_when_arrays_are_the_same
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain $array; set result $status) >/dev/null
+    expect $result --to-equal 1
+  end
+
+  function it_returns_0_when_arrays_are_different
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain 8 9; set result $status) >/dev/null
+    expect $result --to-equal 0
+  end
+
+  function it_returns_1_when_arrays_have_the_same_elements_but_in_different_order
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain 2 1; set result $status) >/dev/null
+    expect $result --to-equal 1
+  end
+
+  function it_returns_1_when_expected_array_contains_the_element
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain 1; set result $status) >/dev/null
+    expect $result --to-equal 1
+  end
+
+  function it_returns_0_when_expected_array_does_not_contain_the_element
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain 9; set result $status) >/dev/null
+    expect $result --to-equal 0
+  end
+
+  function it_returns_1_when_expected_array_contains_all_elements
+    set -l array 1 2 3
+
+    echo (expect $array --to-not-contain 1 2; set result $status) >/dev/null
+    expect $result --to-equal 1
+  end
+
+  function it_returns_0_when_expected_array_does_not_contain_all_elements
+    set -l array 1 2 3
+
+    echo (expect $array --to-not-contain 1 2 9; set result $status) >/dev/null
+    expect $result --to-equal 0
+  end
+
+  function it_returns_0_when_expected_array_contains_less_elements
+    set -l array 1 2
+
+    echo (expect $array --to-not-contain 1 2 9; set result $status)
+    expect $result --to-equal 0
+  end
+end
+
+spec.run $argv