Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

analysis/lang/pl/stempel/file_test.go

@@ -0,0 +1,91 @@
+//  Copyright (c) 2018 Couchbase, Inc.
+//
+// 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 stempel
+
+import (
+	"bufio"
+	"compress/gzip"
+	"os"
+	"strings"
+	"testing"
+
+	"golang.org/x/text/encoding/charmap"
+)
+
+func TestEmpty(t *testing.T) {
+	trie, err := Open("pl/stemmer_20000.tbl")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	buff := []rune("")
+	diff := trie.GetLastOnPath(buff)
+	if len(diff) > 0 {
+		t.Fatalf("expected empty diff, got %v", diff)
+	}
+	buff = Diff(buff, diff)
+	if len(buff) > 0 {
+		t.Fatalf("expected empty buff, got %v", buff)
+	}
+}
+
+// TestStem only tests that we can successfully stem everything in the
+// dictionary without crashing.  It does not attempt to assert correct output.
+func TestStem(t *testing.T) {
+	trie, err := Open("pl/stemmer_20000.tbl")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	wordFileGz, err := os.Open("pl/pl_PL.dic.gz")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		cerr := wordFileGz.Close()
+		if cerr != nil {
+			t.Fatal(cerr)
+		}
+	}()
+
+	wordFile, err := gzip.NewReader(wordFileGz)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		cerr := wordFile.Close()
+		if cerr != nil {
+			t.Fatal(cerr)
+		}
+	}()
+
+	cr := charmap.ISO8859_2.NewDecoder().Reader(wordFile)
+
+	scanner := bufio.NewScanner(cr)
+	for scanner.Scan() {
+		before := scanner.Text()
+		hasSlash := strings.Index(before, "/")
+		if hasSlash > 0 {
+			before = before[0:hasSlash]
+		}
+		buff := []rune(before)
+		diff := trie.GetLastOnPath(buff)
+		_ = Diff(buff, diff)
+	}
+
+	if err := scanner.Err(); err != nil {
+		t.Fatal(err)
+	}
+}