Adding upstream version 0.28.1.

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

tools/picker/excerpt_modifier_test.go

@@ -0,0 +1,170 @@
+package picker
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/spf13/cast"
+)
+
+func TestNewExcerptModifier(t *testing.T) {
+	scenarios := []struct {
+		name        string
+		args        []string
+		expectError bool
+	}{
+		{
+			"no arguments",
+			nil,
+			true,
+		},
+		{
+			"too many arguments",
+			[]string{"12", "false", "something"},
+			true,
+		},
+		{
+			"non-numeric max argument",
+			[]string{"something"}, // should fallback to 0 which is not allowed
+			true,
+		},
+		{
+			"numeric max argument",
+			[]string{"12"},
+			false,
+		},
+		{
+			"non-bool withEllipsis argument",
+			[]string{"12", "something"}, // should fallback to false which is allowed
+			false,
+		},
+		{
+			"truthy withEllipsis argument",
+			[]string{"12", "t"},
+			false,
+		},
+	}
+
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			m, err := newExcerptModifier(s.args...)
+
+			hasErr := err != nil
+			if hasErr != s.expectError {
+				t.Fatalf("Expected hasErr %v, got %v (%v)", s.expectError, hasErr, err)
+			}
+
+			if hasErr {
+				if m != nil {
+					t.Fatalf("Expected nil modifier, got %v", m)
+				}
+
+				return
+			}
+
+			var argMax int
+			if len(s.args) > 0 {
+				argMax = cast.ToInt(s.args[0])
+			}
+
+			var argWithEllipsis bool
+			if len(s.args) > 1 {
+				argWithEllipsis = cast.ToBool(s.args[1])
+			}
+
+			if m.max != argMax {
+				t.Fatalf("Expected max %d, got %d", argMax, m.max)
+			}
+
+			if m.withEllipsis != argWithEllipsis {
+				t.Fatalf("Expected withEllipsis %v, got %v", argWithEllipsis, m.withEllipsis)
+			}
+		})
+	}
+}
+
+func TestExcerptModifierModify(t *testing.T) {
+	html := ` <script>var a = 123;</script>   <p>Hello</p><div id="test_id">t   est<b>12
+	3</b><span>456</span></div><span>word <b>7</b> 89<span>!<b>?</b><b> a </b><b>b </b>c</span>#<h1>title</h1>`
+
+	plainText := "Hello t est12 3456 word 7 89!? a b c# title"
+
+	scenarios := []struct {
+		name     string
+		args     []string
+		value    string
+		expected string
+	}{
+		// without ellipsis
+		{
+			"only max < len(plainText)",
+			[]string{"2"},
+			html,
+			plainText[:2],
+		},
+		{
+			"only max = len(plainText)",
+			[]string{fmt.Sprint(len(plainText))},
+			html,
+			plainText,
+		},
+		{
+			"only max > len(plainText)",
+			[]string{fmt.Sprint(len(plainText) + 5)},
+			html,
+			plainText,
+		},
+
+		// with ellipsis
+		{
+			"with ellipsis and max < len(plainText)",
+			[]string{"2", "t"},
+			html,
+			plainText[:2] + "...",
+		},
+		{
+			"with ellipsis and max = len(plainText)",
+			[]string{fmt.Sprint(len(plainText)), "t"},
+			html,
+			plainText,
+		},
+		{
+			"with ellipsis and max > len(plainText)",
+			[]string{fmt.Sprint(len(plainText) + 5), "t"},
+			html,
+			plainText,
+		},
+
+		// multibyte chars
+		{
+			"mutibyte chars <= max",
+			[]string{"4", "t"},
+			"аб\nв ",
+			"аб в",
+		},
+		{
+			"mutibyte chars > max",
+			[]string{"3", "t"},
+			"аб\nв ",
+			"аб...",
+		},
+	}
+
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			m, err := newExcerptModifier(s.args...)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			raw, err := m.Modify(s.value)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			if v := cast.ToString(raw); v != s.expected {
+				t.Fatalf("Expected %q, got %q", s.expected, v)
+			}
+		})
+	}
+}