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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| /* | ||
| Copyright 2015 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| // Package fields implements a simple field system, parsing and matching | ||
| // selectors with sets of fields. | ||
| package fields |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| Copyright 2015 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package fields | ||
|
|
||
| import ( | ||
| "sort" | ||
| "strings" | ||
| ) | ||
|
|
||
| // Fields allows you to present fields independently from their storage. | ||
| type Fields interface { | ||
| // Has returns whether the provided field exists. | ||
| Has(field string) (exists bool) | ||
|
|
||
| // Get returns the value for the provided field. | ||
| Get(field string) (value string) | ||
| } | ||
|
|
||
| // Set is a map of field:value. It implements Fields. | ||
| type Set map[string]string | ||
|
|
||
| // String returns all fields listed as a human readable string. | ||
| // Conveniently, exactly the format that ParseSelector takes. | ||
| func (ls Set) String() string { | ||
| selector := make([]string, 0, len(ls)) | ||
| for key, value := range ls { | ||
| selector = append(selector, key+"="+value) | ||
| } | ||
| // Sort for determinism. | ||
| sort.StringSlice(selector).Sort() | ||
| return strings.Join(selector, ",") | ||
| } | ||
|
|
||
| // Has returns whether the provided field exists in the map. | ||
| func (ls Set) Has(field string) bool { | ||
| _, exists := ls[field] | ||
| return exists | ||
| } | ||
|
|
||
| // Get returns the value in the map for the provided field. | ||
| func (ls Set) Get(field string) string { | ||
| return ls[field] | ||
| } | ||
|
|
||
| // AsSelector converts fields into a selectors. | ||
| func (ls Set) AsSelector() Selector { | ||
| return SelectorFromSet(ls) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| /* | ||
| Copyright 2015 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package fields | ||
|
|
||
| import ( | ||
| "testing" | ||
| ) | ||
|
|
||
| func matches(t *testing.T, ls Set, want string) { | ||
| if ls.String() != want { | ||
| t.Errorf("Expected '%s', but got '%s'", want, ls.String()) | ||
| } | ||
| } | ||
|
|
||
| func TestSetString(t *testing.T) { | ||
| matches(t, Set{"x": "y"}, "x=y") | ||
| matches(t, Set{"foo": "bar"}, "foo=bar") | ||
| matches(t, Set{"foo": "bar", "baz": "qup"}, "baz=qup,foo=bar") | ||
| } | ||
|
|
||
| func TestFieldHas(t *testing.T) { | ||
| fieldHasTests := []struct { | ||
| Ls Fields | ||
| Key string | ||
| Has bool | ||
| }{ | ||
| {Set{"x": "y"}, "x", true}, | ||
| {Set{"x": ""}, "x", true}, | ||
| {Set{"x": "y"}, "foo", false}, | ||
| } | ||
| for _, lh := range fieldHasTests { | ||
| if has := lh.Ls.Has(lh.Key); has != lh.Has { | ||
| t.Errorf("%#v.Has(%#v) => %v, expected %v", lh.Ls, lh.Key, has, lh.Has) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func TestFieldGet(t *testing.T) { | ||
| ls := Set{"x": "y"} | ||
| if ls.Get("x") != "y" { | ||
| t.Errorf("Set.Get is broken") | ||
| } | ||
| } |
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