// Copyright 2017 The Prometheus Authors
// 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 labels

import "testing"

func mustNewMatcher(t *testing.T, mType MatchType, value string) *Matcher {
	m, err := NewMatcher(mType, "", value)
	if err != nil {
		t.Fatal(err)
	}
	return m
}

func TestMatcher(t *testing.T) {
	tests := []struct {
		matcher *Matcher
		value   string
		match   bool
	}{
		{
			matcher: mustNewMatcher(t, MatchEqual, "bar"),
			value:   "bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchEqual, "bar"),
			value:   "foo-bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchNotEqual, "bar"),
			value:   "bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchNotEqual, "bar"),
			value:   "foo-bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, "bar"),
			value:   "bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, "bar"),
			value:   "foo-bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, ".*bar"),
			value:   "foo-bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchNotRegexp, "bar"),
			value:   "bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchNotRegexp, "bar"),
			value:   "foo-bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchNotRegexp, ".*bar"),
			value:   "foo-bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, `foo.bar`),
			value:   "foo-bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, `foo\.bar`),
			value:   "foo-bar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, `foo\.bar`),
			value:   "foo.bar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchEqual, "foo\nbar"),
			value:   "foo\nbar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, "foo.bar"),
			value:   "foo\nbar",
			match:   false,
		},
		{
			matcher: mustNewMatcher(t, MatchRegexp, "(?s)foo.bar"),
			value:   "foo\nbar",
			match:   true,
		},
		{
			matcher: mustNewMatcher(t, MatchEqual, "~!=\""),
			value:   "~!=\"",
			match:   true,
		},
	}

	for _, test := range tests {
		if test.matcher.Matches(test.value) != test.match {
			t.Fatalf("Unexpected match result for matcher %v and value %q; want %v, got %v", test.matcher, test.value, test.match, !test.match)
		}
	}
}